[{"volume":302,"author":[{"full_name":"Alhaddad, Samer","id":"42456","last_name":"Alhaddad","first_name":"Samer"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"},{"first_name":"Yevgen","last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen"}],"date_updated":"2023-03-15T17:36:13Z","oa":"1","doi":"10.1016/j.jqsrt.2023.108557","publication_identifier":{"issn":["0022-4073"]},"has_accepted_license":"1","publication_status":"published","intvolume":"       302","citation":{"bibtex":"@article{Alhaddad_Förstner_Grynko_2023, title={Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength}, volume={302}, DOI={<a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">10.1016/j.jqsrt.2023.108557</a>}, number={108557}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, publisher={Elsevier BV}, author={Alhaddad, Samer and Förstner, Jens and Grynko, Yevgen}, year={2023} }","mla":"Alhaddad, Samer, et al. “Numerical Study of Light Backscattering from Layers of Absorbing Irregular Particles Larger than the Wavelength.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 302, 108557, Elsevier BV, 2023, doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">10.1016/j.jqsrt.2023.108557</a>.","short":"S. Alhaddad, J. Förstner, Y. Grynko, Journal of Quantitative Spectroscopy and Radiative Transfer 302 (2023).","apa":"Alhaddad, S., Förstner, J., &#38; Grynko, Y. (2023). Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, <i>302</i>, Article 108557. <a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">https://doi.org/10.1016/j.jqsrt.2023.108557</a>","chicago":"Alhaddad, Samer, Jens Förstner, and Yevgen Grynko. “Numerical Study of Light Backscattering from Layers of Absorbing Irregular Particles Larger than the Wavelength.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i> 302 (2023). <a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">https://doi.org/10.1016/j.jqsrt.2023.108557</a>.","ieee":"S. Alhaddad, J. Förstner, and Y. Grynko, “Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength,” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 302, Art. no. 108557, 2023, doi: <a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">10.1016/j.jqsrt.2023.108557</a>.","ama":"Alhaddad S, Förstner J, Grynko Y. Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>. 2023;302. doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2023.108557\">10.1016/j.jqsrt.2023.108557</a>"},"department":[{"_id":"61"}],"user_id":"158","_id":"43018","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"file_date_updated":"2023-03-15T17:35:29Z","article_number":"108557","type":"journal_article","status":"public","date_created":"2023-03-14T12:32:54Z","publisher":"Elsevier BV","title":"Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength","year":"2023","language":[{"iso":"eng"}],"keyword":["tet_topic_scattering"],"ddc":["530"],"publication":"Journal of Quantitative Spectroscopy and Radiative Transfer","file":[{"file_size":1508833,"access_level":"local","file_id":"43028","file_name":"2023-03 Alhaddad - JQSRT - Numerical study of light backscattering from layers of absorbing particles larger than the wavelength.pdf","date_updated":"2023-03-15T15:58:15Z","creator":"fossie","date_created":"2023-03-15T15:58:15Z","relation":"main_file","content_type":"application/pdf"},{"content_type":"application/pdf","relation":"main_file","date_created":"2023-03-15T17:35:29Z","creator":"fossie","date_updated":"2023-03-15T17:35:29Z","file_name":"2023-03 Alhaddad - JQSRT - Numerical study of light backscattering from layers of absorbing particles larger than the wavelength (accepted manuscript).pdf","file_id":"43029","access_level":"open_access","file_size":4254386}]},{"file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2022-06-01T18:56:44Z","creator":"fossie","date_created":"2022-06-01T18:56:44Z","file_size":1419286,"file_id":"31575","access_level":"open_access","file_name":"2022-06 Grynko - Icarus - Negative polarization of light at backscattering from a numerical analog of planetary regoliths.pdf"}],"abstract":[{"lang":"eng","text":"We model negative polarization, which is observed for planetary regoliths at backscattering, solving a full wave problem of light scattering with a numerically exact Discontinuous Galerkin Time Domain (DGTD) method. Pieces of layers with the bulk packing density of particles close to 0.5 are used. The model particles are highly absorbing and have irregular shapes and sizes larger than the wavelength of light. This represents a realistic analog of low-albedo planetary regoliths. Our simulations confirm coherent backscattering mechanism of the origin of negative polarization. We show that angular profiles of polarization are stabilized if the number of particles in a layer piece becomes larger than ten. This allows application of our approach to the negative polarization modeling for planetary regoliths."}],"publication":"Icarus","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_scattering"],"year":"2022","title":"Negative polarization of light at backscattering from a numerical analog of planetary regoliths","date_created":"2022-06-01T18:53:35Z","publisher":"Elsevier BV","status":"public","type":"journal_article","file_date_updated":"2022-06-01T18:56:44Z","user_id":"158","department":[{"_id":"61"}],"project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"31574","citation":{"chicago":"Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Negative Polarization of Light at Backscattering from a Numerical Analog of Planetary Regoliths.” <i>Icarus</i> 384 (2022): 115099. <a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">https://doi.org/10.1016/j.icarus.2022.115099</a>.","ieee":"Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Negative polarization of light at backscattering from a numerical analog of planetary regoliths,” <i>Icarus</i>, vol. 384, p. 115099, 2022, doi: <a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">10.1016/j.icarus.2022.115099</a>.","ama":"Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Negative polarization of light at backscattering from a numerical analog of planetary regoliths. <i>Icarus</i>. 2022;384:115099. doi:<a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">10.1016/j.icarus.2022.115099</a>","bibtex":"@article{Grynko_Shkuratov_Alhaddad_Förstner_2022, title={Negative polarization of light at backscattering from a numerical analog of planetary regoliths}, volume={384}, DOI={<a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">10.1016/j.icarus.2022.115099</a>}, journal={Icarus}, publisher={Elsevier BV}, author={Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}, year={2022}, pages={115099} }","short":"Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, Icarus 384 (2022) 115099.","mla":"Grynko, Yevgen, et al. “Negative Polarization of Light at Backscattering from a Numerical Analog of Planetary Regoliths.” <i>Icarus</i>, vol. 384, Elsevier BV, 2022, p. 115099, doi:<a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">10.1016/j.icarus.2022.115099</a>.","apa":"Grynko, Y., Shkuratov, Y., Alhaddad, S., &#38; Förstner, J. (2022). Negative polarization of light at backscattering from a numerical analog of planetary regoliths. <i>Icarus</i>, <i>384</i>, 115099. <a href=\"https://doi.org/10.1016/j.icarus.2022.115099\">https://doi.org/10.1016/j.icarus.2022.115099</a>"},"intvolume":"       384","page":"115099","publication_status":"published","publication_identifier":{"issn":["0019-1035"]},"has_accepted_license":"1","doi":"10.1016/j.icarus.2022.115099","author":[{"last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059","first_name":"Yevgen"},{"last_name":"Shkuratov","full_name":"Shkuratov, Yuriy","first_name":"Yuriy"},{"id":"42456","full_name":"Alhaddad, Samer","last_name":"Alhaddad","first_name":"Samer"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"volume":384,"oa":"1","date_updated":"2022-06-01T18:57:51Z"},{"volume":8,"author":[{"last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen","first_name":"Yevgen"},{"full_name":"Shkuratov, Yuriy","last_name":"Shkuratov","first_name":"Yuriy"},{"first_name":"Samer","last_name":"Alhaddad","full_name":"Alhaddad, Samer","id":"42456"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"oa":"1","date_updated":"2023-01-11T15:28:17Z","doi":"10.1007/978-3-031-10298-1_4","main_file_link":[{"open_access":"1","url":"https://rdcu.be/cV5GC"}],"has_accepted_license":"1","publication_identifier":{"issn":["2509-2790","2509-2804"],"isbn":["9783031102974","9783031102981"]},"publication_status":"published","intvolume":"         8","citation":{"apa":"Grynko, Y., Shkuratov, Y., Alhaddad, S., &#38; Förstner, J. (2022). Light Scattering by Large Densely Packed Clusters of Particles. In A. Kokhanovsky (Ed.), <i>Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media</i> (Vol. 8). Springer International Publishing. <a href=\"https://doi.org/10.1007/978-3-031-10298-1_4\">https://doi.org/10.1007/978-3-031-10298-1_4</a>","short":"Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, in: A. Kokhanovsky (Ed.), Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media, Springer International Publishing, Cham, 2022.","bibtex":"@inbook{Grynko_Shkuratov_Alhaddad_Förstner_2022, place={Cham}, series={Springer Series in Light Scattering}, title={Light Scattering by Large Densely Packed Clusters of Particles}, volume={8}, DOI={<a href=\"https://doi.org/10.1007/978-3-031-10298-1_4\">10.1007/978-3-031-10298-1_4</a>}, booktitle={Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media}, publisher={Springer International Publishing}, author={Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}, editor={Kokhanovsky, Alexander}, year={2022}, collection={Springer Series in Light Scattering} }","mla":"Grynko, Yevgen, et al. “Light Scattering by Large Densely Packed Clusters of Particles.” <i>Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media</i>, edited by Alexander Kokhanovsky, vol. 8, Springer International Publishing, 2022, doi:<a href=\"https://doi.org/10.1007/978-3-031-10298-1_4\">10.1007/978-3-031-10298-1_4</a>.","ama":"Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Light Scattering by Large Densely Packed Clusters of Particles. In: Kokhanovsky A, ed. <i>Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media</i>. Vol 8. Springer Series in Light Scattering. Springer International Publishing; 2022. doi:<a href=\"https://doi.org/10.1007/978-3-031-10298-1_4\">10.1007/978-3-031-10298-1_4</a>","ieee":"Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Light Scattering by Large Densely Packed Clusters of Particles,” in <i>Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media</i>, vol. 8, A. Kokhanovsky, Ed. Cham: Springer International Publishing, 2022.","chicago":"Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Light Scattering by Large Densely Packed Clusters of Particles.” In <i>Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media</i>, edited by Alexander Kokhanovsky, Vol. 8. Springer Series in Light Scattering. Cham: Springer International Publishing, 2022. <a href=\"https://doi.org/10.1007/978-3-031-10298-1_4\">https://doi.org/10.1007/978-3-031-10298-1_4</a>."},"place":"Cham","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","series_title":"Springer Series in Light Scattering","_id":"33466","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"file_date_updated":"2022-09-22T09:24:45Z","type":"book_chapter","status":"public","editor":[{"last_name":"Kokhanovsky","full_name":"Kokhanovsky, Alexander","first_name":"Alexander"}],"date_created":"2022-09-22T09:18:45Z","publisher":"Springer International Publishing","title":"Light Scattering by Large Densely Packed Clusters of Particles","year":"2022","language":[{"iso":"eng"}],"keyword":["tet_topic_scattering"],"ddc":["530"],"publication":"Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media","file":[{"file_size":1525307,"access_level":"local","file_name":"2022-09 Grynko - Book chapter on Light Scattering by Large Densely Packed Clusters of Particles.pdf","file_id":"33467","date_updated":"2022-09-22T09:24:45Z","creator":"fossie","date_created":"2022-09-22T09:24:45Z","relation":"main_file","content_type":"application/pdf"}],"abstract":[{"text":"We review our results of numerical simulations of light scattering from different systems of densely packed irregular particles. We consider spherical clusters, thick layers and monolayers with realistic topologies and dimensions much larger than the wavelength of light. The maximum bulk packing density of clusters is 0.5. A numerically exact solution of the electromagnetic problem is obtained using the Discontinuous Galerkin Time Domain method and with application of high- performance computing. We show that high packing density causes light localization in such structures which makes an impact on the opposition phenomena: backscattering intensity surge and negative linear polarization feature. Diffuse multiple scattering is significantly reduced in the case of non-absorbing particles and near-field interaction results in a percolation-like light transport determined by the topology of the medium. With this the negative polarization feature caused by single scattering gets enhanced if compared to lower density samples. We also confirm coherent double scattering mechanism of negative polarization for light scattered from dense absorbing slabs. In this case convergent result for the scattering angle polarization dependency at backscattering can be obtained for a layer of just a few tens of particles if they are larger than the wavelength.","lang":"eng"}]},{"date_created":"2021-12-21T13:49:29Z","title":"Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles","issue":"1","year":"2022","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["tet_topic_scattering"],"publication":"Optics Letters","file":[{"relation":"main_file","content_type":"application/pdf","embargo_to":"open_access","file_name":"2022-01 Alhaddad - Optics Letter - Double Scattering.pdf","embargo":"2022-12-21","access_level":"local","file_id":"29076","file_size":3197213,"date_created":"2021-12-21T13:53:47Z","creator":"fossie","date_updated":"2021-12-21T13:53:47Z"}],"abstract":[{"text":"We study a double-scattering coherent mechanism of negative polarization (NP) near opposition that is observed for powder-like surfaces. The problem is solved numerically for absorbing structures with irregular constituents, cubes, spheres, and ellipsoids larger than the wavelength of incident light. Our simulations show that double scattering between two random irregular particles shows weak NP. Adding one more particle significantly increases the relative contribution of double scattering which enhances NP. Simulations with regular shapes and controlled geometric parameters show that the interference mechanism is sensitive to the geometry of the scattering system and can also result in no polarization or even strong enhancement of positive polarization at backscattering.","lang":"eng"}],"author":[{"id":"42456","full_name":"Alhaddad, Samer","last_name":"Alhaddad","first_name":"Samer"},{"first_name":"Yevgen","last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059"},{"full_name":"Farheen, Henna","id":"53444","orcid":"0000-0001-7730-3489","last_name":"Farheen","first_name":"Henna"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"volume":47,"date_updated":"2024-07-22T07:45:05Z","doi":"10.1364/ol.444953","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0146-9592","1539-4794"]},"citation":{"chicago":"Alhaddad, Samer, Yevgen Grynko, Henna Farheen, and Jens Förstner. “Numerical Analysis of the Coherent Mechanism Producing Negative Polarization at Backscattering from Systems of Absorbing Particles.” <i>Optics Letters</i> 47, no. 1 (2022): 58. <a href=\"https://doi.org/10.1364/ol.444953\">https://doi.org/10.1364/ol.444953</a>.","ieee":"S. Alhaddad, Y. Grynko, H. Farheen, and J. Förstner, “Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles,” <i>Optics Letters</i>, vol. 47, no. 1, p. 58, 2022, doi: <a href=\"https://doi.org/10.1364/ol.444953\">10.1364/ol.444953</a>.","ama":"Alhaddad S, Grynko Y, Farheen H, Förstner J. Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles. <i>Optics Letters</i>. 2022;47(1):58. doi:<a href=\"https://doi.org/10.1364/ol.444953\">10.1364/ol.444953</a>","short":"S. Alhaddad, Y. Grynko, H. Farheen, J. Förstner, Optics Letters 47 (2022) 58.","bibtex":"@article{Alhaddad_Grynko_Farheen_Förstner_2022, title={Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles}, volume={47}, DOI={<a href=\"https://doi.org/10.1364/ol.444953\">10.1364/ol.444953</a>}, number={1}, journal={Optics Letters}, author={Alhaddad, Samer and Grynko, Yevgen and Farheen, Henna and Förstner, Jens}, year={2022}, pages={58} }","mla":"Alhaddad, Samer, et al. “Numerical Analysis of the Coherent Mechanism Producing Negative Polarization at Backscattering from Systems of Absorbing Particles.” <i>Optics Letters</i>, vol. 47, no. 1, 2022, p. 58, doi:<a href=\"https://doi.org/10.1364/ol.444953\">10.1364/ol.444953</a>.","apa":"Alhaddad, S., Grynko, Y., Farheen, H., &#38; Förstner, J. (2022). Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles. <i>Optics Letters</i>, <i>47</i>(1), 58. <a href=\"https://doi.org/10.1364/ol.444953\">https://doi.org/10.1364/ol.444953</a>"},"page":"58","intvolume":"        47","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"29075","file_date_updated":"2021-12-21T13:53:47Z","type":"journal_article","status":"public"},{"conference":{"start_date":"2022-09-18","name":"16th Europlanet Science Congress 2022","location":"Granada, Spain","end_date":"2022-09-23"},"doi":"10.5194/epsc2022-151","oa":"1","date_updated":"2026-01-17T16:42:35Z","author":[{"first_name":"Yevgen","last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen"},{"first_name":"Yuriy","last_name":"Shkuratov","full_name":"Shkuratov, Yuriy"},{"full_name":"Alhaddad, Samer","id":"42456","last_name":"Alhaddad","first_name":"Samer"},{"id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","first_name":"Jens"}],"citation":{"bibtex":"@inproceedings{Grynko_Shkuratov_Alhaddad_Förstner_2022, title={Light backscattering from numerical analog of planetary regoliths}, DOI={<a href=\"https://doi.org/10.5194/epsc2022-151\">10.5194/epsc2022-151</a>}, publisher={Copernicus GmbH}, author={Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}, year={2022} }","mla":"Grynko, Yevgen, et al. <i>Light Backscattering from Numerical Analog of Planetary Regoliths</i>. Copernicus GmbH, 2022, doi:<a href=\"https://doi.org/10.5194/epsc2022-151\">10.5194/epsc2022-151</a>.","short":"Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, in: Copernicus GmbH, 2022.","apa":"Grynko, Y., Shkuratov, Y., Alhaddad, S., &#38; Förstner, J. (2022). <i>Light backscattering from numerical analog of planetary regoliths</i>. 16th Europlanet Science Congress 2022, Granada, Spain. <a href=\"https://doi.org/10.5194/epsc2022-151\">https://doi.org/10.5194/epsc2022-151</a>","chicago":"Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Light Backscattering from Numerical Analog of Planetary Regoliths.” Copernicus GmbH, 2022. <a href=\"https://doi.org/10.5194/epsc2022-151\">https://doi.org/10.5194/epsc2022-151</a>.","ieee":"Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Light backscattering from numerical analog of planetary regoliths,” presented at the 16th Europlanet Science Congress 2022, Granada, Spain, 2022, doi: <a href=\"https://doi.org/10.5194/epsc2022-151\">10.5194/epsc2022-151</a>.","ama":"Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Light backscattering from numerical analog of planetary regoliths. In: Copernicus GmbH; 2022. doi:<a href=\"https://doi.org/10.5194/epsc2022-151\">10.5194/epsc2022-151</a>"},"has_accepted_license":"1","publication_status":"published","file_date_updated":"2022-11-23T12:07:10Z","_id":"34136","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"61"},{"_id":"230"}],"user_id":"158","status":"public","type":"conference_abstract","title":"Light backscattering from numerical analog of planetary regoliths","publisher":"Copernicus GmbH","date_created":"2022-11-23T12:03:29Z","year":"2022","keyword":["tet_topic_scattering"],"ddc":["530"],"language":[{"iso":"eng"}],"file":[{"date_updated":"2022-11-23T12:07:10Z","date_created":"2022-11-23T12:07:10Z","creator":"fossie","file_size":645190,"file_id":"34137","file_name":"2022-09 Grynko - EPSC2022 conference -151-print.pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file"}]},{"status":"public","type":"journal_article","file_date_updated":"2020-08-11T15:24:31Z","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"17803","user_id":"158","department":[{"_id":"61"},{"_id":"230"}],"citation":{"mla":"Grynko, Yevgen, et al. “Light Backscattering from Large Clusters of Densely Packed Irregular Particles.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 255, 2020, p. 107234, doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2020.107234\">10.1016/j.jqsrt.2020.107234</a>.","bibtex":"@article{Grynko_Shkuratov_Förstner_2020, title={Light backscattering from large clusters of densely packed irregular particles}, volume={255}, DOI={<a href=\"https://doi.org/10.1016/j.jqsrt.2020.107234\">10.1016/j.jqsrt.2020.107234</a>}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, author={Grynko, Yevgen and Shkuratov, Yuriy and Förstner, Jens}, year={2020}, pages={107234} }","short":"Y. Grynko, Y. Shkuratov, J. Förstner, Journal of Quantitative Spectroscopy and Radiative Transfer 255 (2020) 107234.","apa":"Grynko, Y., Shkuratov, Y., &#38; Förstner, J. (2020). Light backscattering from large clusters of densely packed irregular particles. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, <i>255</i>, 107234. <a href=\"https://doi.org/10.1016/j.jqsrt.2020.107234\">https://doi.org/10.1016/j.jqsrt.2020.107234</a>","chicago":"Grynko, Yevgen, Yuriy Shkuratov, and Jens Förstner. “Light Backscattering from Large Clusters of Densely Packed Irregular Particles.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i> 255 (2020): 107234. <a href=\"https://doi.org/10.1016/j.jqsrt.2020.107234\">https://doi.org/10.1016/j.jqsrt.2020.107234</a>.","ieee":"Y. Grynko, Y. Shkuratov, and J. Förstner, “Light backscattering from large clusters of densely packed irregular particles,” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 255, p. 107234, 2020.","ama":"Grynko Y, Shkuratov Y, Förstner J. Light backscattering from large clusters of densely packed irregular particles. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>. 2020;255:107234. doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2020.107234\">10.1016/j.jqsrt.2020.107234</a>"},"page":"107234","intvolume":"       255","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0022-4073"]},"doi":"10.1016/j.jqsrt.2020.107234","oa":"1","date_updated":"2022-01-06T06:53:20Z","author":[{"last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059","first_name":"Yevgen"},{"last_name":"Shkuratov","full_name":"Shkuratov, Yuriy","first_name":"Yuriy"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158"}],"volume":255,"abstract":[{"text":"We numerically simulate multiple light scattering in discrete disordered media represented by large clusters of irregular non-absorbing particles. The packing density of clusters is 0.5. With such conditions diffuse scattering is significantly reduced and light transport follows propagation channels that are determined by the particle size and topology of the medium. This kind of localization produces coherent backscattering intensity surge and enhanced negative polarization branch if compared to lower density samples.","lang":"eng"}],"file":[{"date_updated":"2020-08-11T15:24:31Z","creator":"fossie","date_created":"2020-08-11T15:24:31Z","title":"Preprint","file_size":1567605,"access_level":"open_access","file_id":"17814","file_name":"2020-08 Grynko - JQSRT PREPRINT - Large Cluster.pdf","content_type":"application/pdf","relation":"main_file"}],"publication":"Journal of Quantitative Spectroscopy and Radiative Transfer","ddc":["530"],"keyword":["tet_topic_scattering"],"language":[{"iso":"eng"}],"year":"2020","title":"Light backscattering from large clusters of densely packed irregular particles","date_created":"2020-08-11T09:07:04Z"},{"department":[{"_id":"61"}],"user_id":"158","_id":"8872","language":[{"iso":"eng"}],"keyword":["tet_topic_scattering"],"publication":"Journal of Quantitative Spectroscopy and Radiative Transfer","type":"journal_article","status":"public","abstract":[{"text":"We consider light scattering from a new type of model particle whose shape is represented in the form of a generalized ellipsoid having N foci, where N is greater than two. Such particles can be convex as well as concave. We use the geometrical optics approximation to study the light scattering from 3-foci particles. Non-zero elements of the scattering matrix are calculated for ensembles of randomly oriented independent transparent particles, m = n + i0. Several internal reflection orders are considered separately. It was found that the transmission-transmission (TT) and transmission-reflectance-transmission (TRT) components dominate in the formation of intensity of scattered light at large and small phase angles, respectively. We found a significant role of the total internal reflections of the TRT in the middle portion of the phase angle range. The main factors in the formation of positive linear polarization are the R and TRT component. The TT component is responsible for the formation of negative polarization branch at large phase angles.","lang":"eng"}],"volume":231,"date_created":"2019-04-11T07:38:54Z","author":[{"first_name":"Dmitriy","full_name":"Stankevich, Dmitriy","last_name":"Stankevich"},{"full_name":"Hradyska, Larissa","last_name":"Hradyska","first_name":"Larissa"},{"first_name":"Yuriy","full_name":"Shkuratov, Yuriy","last_name":"Shkuratov"},{"first_name":"Yevgen","last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059"},{"last_name":"Videen","full_name":"Videen, Gorden","first_name":"Gorden"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"date_updated":"2022-01-06T07:04:04Z","doi":"10.1016/j.jqsrt.2019.04.016","title":"Light scattering by 3-Foci convex and concave particles in the geometrical optics approximation","publication_identifier":{"issn":["0022-4073"]},"publication_status":"published","intvolume":"       231","page":"49","citation":{"ieee":"D. Stankevich, L. Hradyska, Y. Shkuratov, Y. Grynko, G. Videen, and J. Förstner, “Light scattering by 3-Foci convex and concave particles in the geometrical optics approximation,” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 231, p. 49, 2019.","chicago":"Stankevich, Dmitriy, Larissa Hradyska, Yuriy Shkuratov, Yevgen Grynko, Gorden Videen, and Jens Förstner. “Light Scattering by 3-Foci Convex and Concave Particles in the Geometrical Optics Approximation.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i> 231 (2019): 49. <a href=\"https://doi.org/10.1016/j.jqsrt.2019.04.016\">https://doi.org/10.1016/j.jqsrt.2019.04.016</a>.","ama":"Stankevich D, Hradyska L, Shkuratov Y, Grynko Y, Videen G, Förstner J. Light scattering by 3-Foci convex and concave particles in the geometrical optics approximation. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>. 2019;231:49. doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2019.04.016\">10.1016/j.jqsrt.2019.04.016</a>","mla":"Stankevich, Dmitriy, et al. “Light Scattering by 3-Foci Convex and Concave Particles in the Geometrical Optics Approximation.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 231, 2019, p. 49, doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2019.04.016\">10.1016/j.jqsrt.2019.04.016</a>.","bibtex":"@article{Stankevich_Hradyska_Shkuratov_Grynko_Videen_Förstner_2019, title={Light scattering by 3-Foci convex and concave particles in the geometrical optics approximation}, volume={231}, DOI={<a href=\"https://doi.org/10.1016/j.jqsrt.2019.04.016\">10.1016/j.jqsrt.2019.04.016</a>}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, author={Stankevich, Dmitriy and Hradyska, Larissa and Shkuratov, Yuriy and Grynko, Yevgen and Videen, Gorden and Förstner, Jens}, year={2019}, pages={49} }","short":"D. Stankevich, L. Hradyska, Y. Shkuratov, Y. Grynko, G. Videen, J. Förstner, Journal of Quantitative Spectroscopy and Radiative Transfer 231 (2019) 49.","apa":"Stankevich, D., Hradyska, L., Shkuratov, Y., Grynko, Y., Videen, G., &#38; Förstner, J. (2019). Light scattering by 3-Foci convex and concave particles in the geometrical optics approximation. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, <i>231</i>, 49. <a href=\"https://doi.org/10.1016/j.jqsrt.2019.04.016\">https://doi.org/10.1016/j.jqsrt.2019.04.016</a>"},"year":"2019"},{"type":"journal_article","status":"public","_id":"4324","user_id":"158","department":[{"_id":"61"}],"article_type":"original","file_date_updated":"2021-07-27T21:04:54Z","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0146-9592","1539-4794"]},"citation":{"apa":"Grynko, Y., Shkuratov, Y., &#38; Förstner, J. (2018). Intensity surge and negative polarization of light from compact irregular particles. <i>Optics Letters</i>, <i>43</i>(15), 3562. <a href=\"https://doi.org/10.1364/ol.43.003562\">https://doi.org/10.1364/ol.43.003562</a>","mla":"Grynko, Yevgen, et al. “Intensity Surge and Negative Polarization of Light from Compact Irregular Particles.” <i>Optics Letters</i>, vol. 43, no. 15, The Optical Society, 2018, p. 3562, doi:<a href=\"https://doi.org/10.1364/ol.43.003562\">10.1364/ol.43.003562</a>.","bibtex":"@article{Grynko_Shkuratov_Förstner_2018, title={Intensity surge and negative polarization of light from compact irregular particles}, volume={43}, DOI={<a href=\"https://doi.org/10.1364/ol.43.003562\">10.1364/ol.43.003562</a>}, number={15}, journal={Optics Letters}, publisher={The Optical Society}, author={Grynko, Yevgen and Shkuratov, Yuriy and Förstner, Jens}, year={2018}, pages={3562} }","short":"Y. Grynko, Y. Shkuratov, J. Förstner, Optics Letters 43 (2018) 3562.","ama":"Grynko Y, Shkuratov Y, Förstner J. Intensity surge and negative polarization of light from compact irregular particles. <i>Optics Letters</i>. 2018;43(15):3562. doi:<a href=\"https://doi.org/10.1364/ol.43.003562\">10.1364/ol.43.003562</a>","ieee":"Y. Grynko, Y. Shkuratov, and J. Förstner, “Intensity surge and negative polarization of light from compact irregular particles,” <i>Optics Letters</i>, vol. 43, no. 15, p. 3562, 2018.","chicago":"Grynko, Yevgen, Yuriy Shkuratov, and Jens Förstner. “Intensity Surge and Negative Polarization of Light from Compact Irregular Particles.” <i>Optics Letters</i> 43, no. 15 (2018): 3562. <a href=\"https://doi.org/10.1364/ol.43.003562\">https://doi.org/10.1364/ol.43.003562</a>."},"page":"3562","intvolume":"        43","date_updated":"2022-01-06T07:00:55Z","oa":"1","author":[{"first_name":"Yevgen","last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059"},{"last_name":"Shkuratov","full_name":"Shkuratov, Yuriy","first_name":"Yuriy"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"volume":43,"doi":"10.1364/ol.43.003562","publication":"Optics Letters","abstract":[{"text":"We study the dependence of the intensity and linear polarization of light scattered by isolated particles with the compact\r\nirregular shape on their size using the discontinuous Galerkin time domain numerical method. The size parameter of particles varies in the range of X = 10 to 150, and the complex refractive index is m = 1.5 + 0i. Our results show\r\nthat the backscattering negative polarization branch weakens monotonously, but does not disappear at large sizes, up to the geometrical optics regime, and can be simulated without accounting for wave effects. The intensity backscattering surge becomes narrower with increasing particle size. For X = 150, the surge width is several degrees.","lang":"eng"}],"file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2021-07-27T21:04:54Z","date_created":"2018-08-30T10:18:10Z","creator":"hclaudia","file_size":1797893,"file_id":"4325","access_level":"open_access","file_name":"2018-07 Grynko,Shkuratov,Förstner_Intensity surge and negative polarization of light from compact irregular particles.pdf"}],"ddc":["530"],"keyword":["tet_topic_scattering"],"language":[{"iso":"eng"}],"issue":"15","year":"2018","publisher":"The Optical Society","date_created":"2018-08-30T10:17:08Z","title":"Intensity surge and negative polarization of light from compact irregular particles"},{"title":"Radar backscattering from a large-grain cometary coma: numerical simulation","publisher":"EDP Sciences","date_created":"2018-07-10T10:19:01Z","year":"2017","ddc":["530"],"keyword":["tet_topic_scattering"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"We numerically simulate the circular polarization ratio of the radar signal backscattered from a large-grain cometary coma and compare the simulation results with the radar measurements for seven comets. We apply the discrete dipole approximation method and a model of random irregular particles. Our results confirm water ice composition of the cm-sized chunks detected by the NASA Deep Impact space probe in the vicinity of the nucleus of Comet 103P/Hartley 2. The index of the power-law size distribution in this case can be constrained to the range n ≈ 3.3–4.3. For the other considered comets the circular polarization ratio can be reproduced with variations of the power index between 2 and 5."}],"file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2018-08-14T10:17:27Z","creator":"hclaudia","date_updated":"2018-09-03T14:05:33Z","access_level":"open_access","file_id":"3903","file_name":"2017-10 Dogra,Grynko,Zubko,Förstner_Radar backscattering from large scale cometary coma-Numerical simulation_Astronomy and Astrophysics.pdf","file_size":1206283}],"publication":"Astronomy & Astrophysics","doi":"10.1051/0004-6361/201730801","date_updated":"2022-01-06T06:59:21Z","oa":"1","author":[{"full_name":"Dogra, Shraddha","last_name":"Dogra","first_name":"Shraddha"},{"last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen","first_name":"Yevgen"},{"last_name":"Zubko","full_name":"Zubko, Evgenij","first_name":"Evgenij"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"volume":608,"citation":{"chicago":"Dogra, Shraddha, Yevgen Grynko, Evgenij Zubko, and Jens Förstner. “Radar Backscattering from a Large-Grain Cometary Coma: Numerical Simulation.” <i>Astronomy &#38; Astrophysics</i> 608 (2017): A20. <a href=\"https://doi.org/10.1051/0004-6361/201730801\">https://doi.org/10.1051/0004-6361/201730801</a>.","ieee":"S. Dogra, Y. Grynko, E. Zubko, and J. Förstner, “Radar backscattering from a large-grain cometary coma: numerical simulation,” <i>Astronomy &#38; Astrophysics</i>, vol. 608, p. A20, 2017.","ama":"Dogra S, Grynko Y, Zubko E, Förstner J. Radar backscattering from a large-grain cometary coma: numerical simulation. <i>Astronomy &#38; Astrophysics</i>. 2017;608:A20. doi:<a href=\"https://doi.org/10.1051/0004-6361/201730801\">10.1051/0004-6361/201730801</a>","apa":"Dogra, S., Grynko, Y., Zubko, E., &#38; Förstner, J. (2017). Radar backscattering from a large-grain cometary coma: numerical simulation. <i>Astronomy &#38; Astrophysics</i>, <i>608</i>, A20. <a href=\"https://doi.org/10.1051/0004-6361/201730801\">https://doi.org/10.1051/0004-6361/201730801</a>","mla":"Dogra, Shraddha, et al. “Radar Backscattering from a Large-Grain Cometary Coma: Numerical Simulation.” <i>Astronomy &#38; Astrophysics</i>, vol. 608, EDP Sciences, 2017, p. A20, doi:<a href=\"https://doi.org/10.1051/0004-6361/201730801\">10.1051/0004-6361/201730801</a>.","bibtex":"@article{Dogra_Grynko_Zubko_Förstner_2017, title={Radar backscattering from a large-grain cometary coma: numerical simulation}, volume={608}, DOI={<a href=\"https://doi.org/10.1051/0004-6361/201730801\">10.1051/0004-6361/201730801</a>}, journal={Astronomy &#38; Astrophysics}, publisher={EDP Sciences}, author={Dogra, Shraddha and Grynko, Yevgen and Zubko, Evgenij and Förstner, Jens}, year={2017}, pages={A20} }","short":"S. Dogra, Y. Grynko, E. Zubko, J. Förstner, Astronomy &#38; Astrophysics 608 (2017) A20."},"intvolume":"       608","page":"A20","publication_status":"published","has_accepted_license":"1","publication_identifier":{"issn":["0004-6361","1432-0746"]},"article_type":"original","file_date_updated":"2018-09-03T14:05:33Z","_id":"3523","user_id":"158","department":[{"_id":"61"}],"urn":"35230","status":"public","type":"journal_article"},{"year":"2016","title":"Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation","publisher":"Elsevier BV","date_created":"2018-08-07T10:20:26Z","abstract":[{"lang":"eng","text":"The problem of light scattering by ice crystals of cirrus clouds is considered in the case of a hexagonal ice plate with different distributions over crystal orientations. The physical-optics approximation based on (E, M)-diffraction theory is compared with two exact numerical methods: the finite difference time domain (FDTD) and the discontinuous Galerkin time domain (DGTD) in order to estimate its accuracy and limits of applicability. It is shown that the accuracy of the physical-optics approximation is estimated as 95% for the averaged backscattering Mueller matrix for particles with size parameter more than 120. Furthermore, the simple expression that allows one to estimate the minimal number of particle orientations required for appropriate spatial averaging has been derived."}],"file":[{"content_type":"application/pdf","relation":"main_file","success":1,"date_created":"2018-08-07T10:23:33Z","creator":"hclaudia","date_updated":"2018-08-07T10:23:33Z","file_name":"2017-07 Grynko_Light scattering by ice crystals of cirrus clouds From exact numerical methods to physical-optics approximation.pdf","file_id":"3835","access_level":"closed","file_size":1916248}],"publication":"Journal of Quantitative Spectroscopy and Radiative Transfer","keyword":["tet_topic_scattering"],"ddc":["530"],"language":[{"iso":"eng"}],"page":"132-140","intvolume":"       195","citation":{"mla":"Konoshonkin, Alexander, et al. “Light Scattering by Ice Crystals of Cirrus Clouds: From Exact Numerical Methods to Physical-Optics Approximation.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 195, Elsevier BV, 2016, pp. 132–40, doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2016.12.024\">10.1016/j.jqsrt.2016.12.024</a>.","bibtex":"@article{Konoshonkin_Borovoi_Kustova_Okamoto_Ishimoto_Grynko_Förstner_2016, title={Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation}, volume={195}, DOI={<a href=\"https://doi.org/10.1016/j.jqsrt.2016.12.024\">10.1016/j.jqsrt.2016.12.024</a>}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, publisher={Elsevier BV}, author={Konoshonkin, Alexander and Borovoi, Anatoli and Kustova, Natalia and Okamoto, Hajime and Ishimoto, Hiroshi and Grynko, Yevgen and Förstner, Jens}, year={2016}, pages={132–140} }","short":"A. Konoshonkin, A. Borovoi, N. Kustova, H. Okamoto, H. Ishimoto, Y. Grynko, J. Förstner, Journal of Quantitative Spectroscopy and Radiative Transfer 195 (2016) 132–140.","apa":"Konoshonkin, A., Borovoi, A., Kustova, N., Okamoto, H., Ishimoto, H., Grynko, Y., &#38; Förstner, J. (2016). Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, <i>195</i>, 132–140. <a href=\"https://doi.org/10.1016/j.jqsrt.2016.12.024\">https://doi.org/10.1016/j.jqsrt.2016.12.024</a>","chicago":"Konoshonkin, Alexander, Anatoli Borovoi, Natalia Kustova, Hajime Okamoto, Hiroshi Ishimoto, Yevgen Grynko, and Jens Förstner. “Light Scattering by Ice Crystals of Cirrus Clouds: From Exact Numerical Methods to Physical-Optics Approximation.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i> 195 (2016): 132–40. <a href=\"https://doi.org/10.1016/j.jqsrt.2016.12.024\">https://doi.org/10.1016/j.jqsrt.2016.12.024</a>.","ieee":"A. Konoshonkin <i>et al.</i>, “Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation,” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 195, pp. 132–140, 2016.","ama":"Konoshonkin A, Borovoi A, Kustova N, et al. Light scattering by ice crystals of cirrus clouds: From exact numerical methods to physical-optics approximation. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>. 2016;195:132-140. doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2016.12.024\">10.1016/j.jqsrt.2016.12.024</a>"},"has_accepted_license":"1","publication_identifier":{"issn":["0022-4073"]},"publication_status":"published","doi":"10.1016/j.jqsrt.2016.12.024","date_updated":"2022-01-06T06:59:40Z","volume":195,"author":[{"first_name":"Alexander","full_name":"Konoshonkin, Alexander","last_name":"Konoshonkin"},{"full_name":"Borovoi, Anatoli","last_name":"Borovoi","first_name":"Anatoli"},{"full_name":"Kustova, Natalia","last_name":"Kustova","first_name":"Natalia"},{"last_name":"Okamoto","full_name":"Okamoto, Hajime","first_name":"Hajime"},{"first_name":"Hiroshi","last_name":"Ishimoto","full_name":"Ishimoto, Hiroshi"},{"first_name":"Yevgen","last_name":"Grynko","full_name":"Grynko, Yevgen","id":"26059"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"status":"public","type":"journal_article","article_type":"original","file_date_updated":"2018-08-07T10:23:33Z","_id":"3834","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"61"}],"user_id":"158"},{"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_id":"4326","file_name":"2016 Konoshonkin et al_Comparison beween the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds.pdf","access_level":"closed","file_size":811794,"creator":"hclaudia","date_created":"2018-08-30T10:26:54Z","date_updated":"2018-08-30T10:26:54Z"}],"abstract":[{"text":"In the problem of light scattering by ice crystals of cirrus clouds, two exact methods (FDTD – finite difference time domain and DGTD – discontinuous Galerkin time domain) and the physical-optics approximation are used for numerical calculations of the Mueller matrix in the case of ice hexagonal plates and columns. It is shown that for the crystals larger than 10 μm at the wavelength of 0.532 μm the exact methods and physical-optics approximation closely agreed within three diffraction fringes about the centers of the diffraction patterns. As a result, in the case of random orientation of these crystals, the physical-optics approximation provides accuracy 95% for the averaged Mueller matrix.","lang":"eng"}],"publication":"22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics","language":[{"iso":"eng"}],"keyword":["tet_topic_scattering"],"ddc":["530"],"year":"2016","title":"Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds","date_created":"2018-08-08T09:27:40Z","publisher":"SPIE","status":"public","editor":[{"last_name":"Matvienko","full_name":"Matvienko, Gennadii G.","first_name":"Gennadii G."},{"last_name":"Romanovskii","full_name":"Romanovskii, Oleg A.","first_name":"Oleg A."}],"type":"conference","file_date_updated":"2018-08-30T10:26:54Z","department":[{"_id":"61"}],"user_id":"55706","_id":"3840","citation":{"apa":"Konoshonkin, A. V., Kustova, N. V., Borovoi, A. G., Okamoto, H., Sato, K., Ishimoto, H., … Förstner, J. (2016). Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds. In G. G. Matvienko &#38; O. A. Romanovskii (Eds.), <i>22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics</i>. SPIE. <a href=\"https://doi.org/10.1117/12.2248409\">https://doi.org/10.1117/12.2248409</a>","mla":"Konoshonkin, Alexander V., et al. “Comparison between the Physical-Optics Approximation and Exact Methods Solving the Problem of Light Scattering by Ice Crystals of Cirrus Clouds.” <i>22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics</i>, edited by Gennadii G. Matvienko and Oleg A. Romanovskii, SPIE, 2016, doi:<a href=\"https://doi.org/10.1117/12.2248409\">10.1117/12.2248409</a>.","short":"A.V. Konoshonkin, N.V. Kustova, A.G. Borovoi, H. Okamoto, K. Sato, H. Ishimoto, Y. Grynko, J. Förstner, in: G.G. Matvienko, O.A. Romanovskii (Eds.), 22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, SPIE, 2016.","bibtex":"@inproceedings{Konoshonkin_Kustova_Borovoi_Okamoto_Sato_Ishimoto_Grynko_Förstner_2016, title={Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds}, DOI={<a href=\"https://doi.org/10.1117/12.2248409\">10.1117/12.2248409</a>}, booktitle={22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics}, publisher={SPIE}, author={Konoshonkin, Alexander V. and Kustova, Natalia V. and Borovoi, Anatoli G. and Okamoto, H. and Sato, K. and Ishimoto, H. and Grynko, Yevgen and Förstner, Jens}, editor={Matvienko, Gennadii G. and Romanovskii, Oleg A.Editors}, year={2016} }","ama":"Konoshonkin AV, Kustova NV, Borovoi AG, et al. Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds. In: Matvienko GG, Romanovskii OA, eds. <i>22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics</i>. SPIE; 2016. doi:<a href=\"https://doi.org/10.1117/12.2248409\">10.1117/12.2248409</a>","ieee":"A. V. Konoshonkin <i>et al.</i>, “Comparison between the physical-optics approximation and exact methods solving the problem of light scattering by ice crystals of cirrus clouds,” in <i>22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics</i>, 2016.","chicago":"Konoshonkin, Alexander V., Natalia V. Kustova, Anatoli G. Borovoi, H. Okamoto, K. Sato, H. Ishimoto, Yevgen Grynko, and Jens Förstner. “Comparison between the Physical-Optics Approximation and Exact Methods Solving the Problem of Light Scattering by Ice Crystals of Cirrus Clouds.” In <i>22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics</i>, edited by Gennadii G. Matvienko and Oleg A. Romanovskii. SPIE, 2016. <a href=\"https://doi.org/10.1117/12.2248409\">https://doi.org/10.1117/12.2248409</a>."},"has_accepted_license":"1","publication_status":"published","doi":"10.1117/12.2248409","conference":{"name":"22nd International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics"},"author":[{"first_name":"Alexander V.","full_name":"Konoshonkin, Alexander V.","last_name":"Konoshonkin"},{"full_name":"Kustova, Natalia V.","last_name":"Kustova","first_name":"Natalia V."},{"first_name":"Anatoli G.","full_name":"Borovoi, Anatoli G.","last_name":"Borovoi"},{"full_name":"Okamoto, H.","last_name":"Okamoto","first_name":"H."},{"first_name":"K.","full_name":"Sato, K.","last_name":"Sato"},{"first_name":"H.","full_name":"Ishimoto, H.","last_name":"Ishimoto"},{"first_name":"Yevgen","last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen"},{"first_name":"Jens","full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862"}],"date_updated":"2022-01-06T06:59:42Z"},{"article_type":"original","file_date_updated":"2018-08-08T09:56:05Z","_id":"3843","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"61"}],"user_id":"158","status":"public","type":"journal_article","doi":"10.1364/ol.41.003491","date_updated":"2022-01-06T06:59:43Z","volume":41,"author":[{"first_name":"Yevgen","full_name":"Grynko, Yevgen","id":"26059","last_name":"Grynko"},{"first_name":"Yuriy","last_name":"Shkuratov","full_name":"Shkuratov, Yuriy"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"intvolume":"        41","page":"3491-3493","citation":{"ieee":"Y. Grynko, Y. Shkuratov, and J. Förstner, “Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness,” <i>Optics Letters</i>, vol. 41, no. 15, pp. 3491–3493, 2016.","chicago":"Grynko, Yevgen, Yuriy Shkuratov, and Jens Förstner. “Light Scattering by Irregular Particles Much Larger than the Wavelength with Wavelength-Scale Surface Roughness.” <i>Optics Letters</i> 41, no. 15 (2016): 3491–93. <a href=\"https://doi.org/10.1364/ol.41.003491\">https://doi.org/10.1364/ol.41.003491</a>.","ama":"Grynko Y, Shkuratov Y, Förstner J. Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness. <i>Optics Letters</i>. 2016;41(15):3491-3493. doi:<a href=\"https://doi.org/10.1364/ol.41.003491\">10.1364/ol.41.003491</a>","apa":"Grynko, Y., Shkuratov, Y., &#38; Förstner, J. (2016). Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness. <i>Optics Letters</i>, <i>41</i>(15), 3491–3493. <a href=\"https://doi.org/10.1364/ol.41.003491\">https://doi.org/10.1364/ol.41.003491</a>","short":"Y. Grynko, Y. Shkuratov, J. Förstner, Optics Letters 41 (2016) 3491–3493.","mla":"Grynko, Yevgen, et al. “Light Scattering by Irregular Particles Much Larger than the Wavelength with Wavelength-Scale Surface Roughness.” <i>Optics Letters</i>, vol. 41, no. 15, The Optical Society, 2016, pp. 3491–93, doi:<a href=\"https://doi.org/10.1364/ol.41.003491\">10.1364/ol.41.003491</a>.","bibtex":"@article{Grynko_Shkuratov_Förstner_2016, title={Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness}, volume={41}, DOI={<a href=\"https://doi.org/10.1364/ol.41.003491\">10.1364/ol.41.003491</a>}, number={15}, journal={Optics Letters}, publisher={The Optical Society}, author={Grynko, Yevgen and Shkuratov, Yuriy and Förstner, Jens}, year={2016}, pages={3491–3493} }"},"publication_identifier":{"issn":["0146-9592","1539-4794"]},"has_accepted_license":"1","publication_status":"published","keyword":["tet_topic_scattering"],"ddc":["530"],"language":[{"iso":"eng"}],"abstract":[{"text":"We simulate light scattering by random irregular particles that have dimensions much larger than the wavelength of incident light at the size parameter of 𝑋=200 using the discontinuous Galerkin time domain method. A comparison of the DGTD solution for smoothly faceted particles with that obtained with a geometric optics model shows good agreement for the scattering angle curves of intensity and polarization. If a wavelength-scale surface roughness is introduced, diffuse scattering at rough interface results in smooth and featureless curves for all scattering matrix elements which is consistent with the laboratory measurements of real samples.","lang":"eng"}],"file":[{"success":1,"relation":"main_file","content_type":"application/pdf","file_size":1581998,"file_name":"2016-07 Grynko,Förstner_Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness_Optics Letter ol-41-15-3491.pdf","file_id":"3844","access_level":"closed","date_updated":"2018-08-08T09:56:05Z","date_created":"2018-08-08T09:56:05Z","creator":"hclaudia"}],"publication":"Optics Letters","title":"Light scattering by irregular particles much larger than the wavelength with wavelength-scale surface roughness","publisher":"The Optical Society","date_created":"2018-08-08T09:53:28Z","year":"2016","issue":"15"},{"title":"Light scattering by ice crystals of cirrus clouds: comparison of the physical optics methods","publisher":"Elsevier BV","date_created":"2018-08-08T10:41:31Z","year":"2016","ddc":["530"],"keyword":["tet_topic_scattering"],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"The physical optics approximations are derived from the Maxwell equations. The scattered field equations by Kirchhoff, Stratton-Chu, Kottler and Franz are compared and discussed. It is shown that in the case of faceted particles, these equations reduce to a sum of the diffraction integrals, where every diffraction integral is associated with one plane–parallel optical beam leaving a particle facet. In the far zone, these diffraction integrals correspond to the Fraunhofer diffraction patterns. The paper discusses the E-, M- and (E, M)-diffraction theories as applied to ice crystals of cirrus clouds. The comparison to the exact solution obtained by the discontinuous Galerkin time domain method shows that the Kirchhoff diffraction theory is preferable."}],"file":[{"date_updated":"2018-08-08T10:47:08Z","creator":"hclaudia","date_created":"2018-08-08T10:47:08Z","file_size":3315958,"file_id":"3850","access_level":"closed","file_name":"2016 Grynko,Förstner_Light scattering by ice crystals of cirrus clouds comparison of the physical optics methods.pdf","content_type":"application/pdf","success":1,"relation":"main_file"}],"publication":"Journal of Quantitative Spectroscopy and Radiative Transfer","doi":"10.1016/j.jqsrt.2016.05.006","date_updated":"2022-01-06T06:59:45Z","author":[{"first_name":"Alexander V.","full_name":"Konoshonkin, Alexander V.","last_name":"Konoshonkin"},{"full_name":"Kustova, Natalia V.","last_name":"Kustova","first_name":"Natalia V."},{"last_name":"Borovoi","full_name":"Borovoi, Anatoli G.","first_name":"Anatoli G."},{"last_name":"Grynko","id":"26059","full_name":"Grynko, Yevgen","first_name":"Yevgen"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"volume":182,"citation":{"ieee":"A. V. Konoshonkin, N. V. Kustova, A. G. Borovoi, Y. Grynko, and J. Förstner, “Light scattering by ice crystals of cirrus clouds: comparison of the physical optics methods,” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 182, pp. 12–23, 2016.","chicago":"Konoshonkin, Alexander V., Natalia V. Kustova, Anatoli G. Borovoi, Yevgen Grynko, and Jens Förstner. “Light Scattering by Ice Crystals of Cirrus Clouds: Comparison of the Physical Optics Methods.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i> 182 (2016): 12–23. <a href=\"https://doi.org/10.1016/j.jqsrt.2016.05.006\">https://doi.org/10.1016/j.jqsrt.2016.05.006</a>.","ama":"Konoshonkin AV, Kustova NV, Borovoi AG, Grynko Y, Förstner J. Light scattering by ice crystals of cirrus clouds: comparison of the physical optics methods. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>. 2016;182:12-23. doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2016.05.006\">10.1016/j.jqsrt.2016.05.006</a>","bibtex":"@article{Konoshonkin_Kustova_Borovoi_Grynko_Förstner_2016, title={Light scattering by ice crystals of cirrus clouds: comparison of the physical optics methods}, volume={182}, DOI={<a href=\"https://doi.org/10.1016/j.jqsrt.2016.05.006\">10.1016/j.jqsrt.2016.05.006</a>}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, publisher={Elsevier BV}, author={Konoshonkin, Alexander V. and Kustova, Natalia V. and Borovoi, Anatoli G. and Grynko, Yevgen and Förstner, Jens}, year={2016}, pages={12–23} }","mla":"Konoshonkin, Alexander V., et al. “Light Scattering by Ice Crystals of Cirrus Clouds: Comparison of the Physical Optics Methods.” <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, vol. 182, Elsevier BV, 2016, pp. 12–23, doi:<a href=\"https://doi.org/10.1016/j.jqsrt.2016.05.006\">10.1016/j.jqsrt.2016.05.006</a>.","short":"A.V. Konoshonkin, N.V. Kustova, A.G. Borovoi, Y. Grynko, J. Förstner, Journal of Quantitative Spectroscopy and Radiative Transfer 182 (2016) 12–23.","apa":"Konoshonkin, A. V., Kustova, N. V., Borovoi, A. G., Grynko, Y., &#38; Förstner, J. (2016). Light scattering by ice crystals of cirrus clouds: comparison of the physical optics methods. <i>Journal of Quantitative Spectroscopy and Radiative Transfer</i>, <i>182</i>, 12–23. <a href=\"https://doi.org/10.1016/j.jqsrt.2016.05.006\">https://doi.org/10.1016/j.jqsrt.2016.05.006</a>"},"page":"12-23","intvolume":"       182","publication_status":"published","publication_identifier":{"issn":["0022-4073"]},"has_accepted_license":"1","article_type":"original","file_date_updated":"2018-08-08T10:47:08Z","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"3849","user_id":"55706","department":[{"_id":"61"}],"status":"public","type":"journal_article"},{"author":[{"first_name":"Yevgen","id":"26059","full_name":"Grynko, Yevgen","last_name":"Grynko"},{"first_name":"Yuriy","full_name":"Shkuratov, Yuriy","last_name":"Shkuratov"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"date_created":"2018-03-26T14:42:02Z","volume":38,"date_updated":"2022-01-06T06:53:20Z","doi":"10.1364/OL.38.005153","title":"Light scattering by randomly irregular dielectric particles larger than the wavelength","issue":"23","citation":{"ieee":"Y. Grynko, Y. Shkuratov, and J. Förstner, “Light scattering by randomly irregular dielectric particles larger than the wavelength,” <i>Optical Letters</i>, vol. 38, no. 23, pp. 5153–5156, 2013.","chicago":"Grynko, Yevgen, Yuriy Shkuratov, and Jens Förstner. “Light Scattering by Randomly Irregular Dielectric Particles Larger than the Wavelength.” <i>Optical Letters</i> 38, no. 23 (2013): 5153–56. <a href=\"https://doi.org/10.1364/OL.38.005153\">https://doi.org/10.1364/OL.38.005153</a>.","ama":"Grynko Y, Shkuratov Y, Förstner J. Light scattering by randomly irregular dielectric particles larger than the wavelength. <i>Optical Letters</i>. 2013;38(23):5153-5156. doi:<a href=\"https://doi.org/10.1364/OL.38.005153\">10.1364/OL.38.005153</a>","mla":"Grynko, Yevgen, et al. “Light Scattering by Randomly Irregular Dielectric Particles Larger than the Wavelength.” <i>Optical Letters</i>, vol. 38, no. 23, 2013, pp. 5153–56, doi:<a href=\"https://doi.org/10.1364/OL.38.005153\">10.1364/OL.38.005153</a>.","bibtex":"@article{Grynko_Shkuratov_Förstner_2013, title={Light scattering by randomly irregular dielectric particles larger than the wavelength}, volume={38}, DOI={<a href=\"https://doi.org/10.1364/OL.38.005153\">10.1364/OL.38.005153</a>}, number={23}, journal={Optical Letters}, author={Grynko, Yevgen and Shkuratov, Yuriy and Förstner, Jens}, year={2013}, pages={5153–5156} }","short":"Y. Grynko, Y. Shkuratov, J. Förstner, Optical Letters 38 (2013) 5153–5156.","apa":"Grynko, Y., Shkuratov, Y., &#38; Förstner, J. (2013). Light scattering by randomly irregular dielectric particles larger than the wavelength. <i>Optical Letters</i>, <i>38</i>(23), 5153–5156. <a href=\"https://doi.org/10.1364/OL.38.005153\">https://doi.org/10.1364/OL.38.005153</a>"},"page":"5153-5156","intvolume":"        38","year":"2013","user_id":"158","department":[{"_id":"61"}],"_id":"1783","language":[{"iso":"eng"}],"keyword":["tet_topic_scattering"],"type":"journal_article","publication":"Optical Letters","status":"public"}]