--- _id: '43018' article_number: '108557' author: - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko citation: ama: Alhaddad S, Förstner J, Grynko Y. Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength. Journal of Quantitative Spectroscopy and Radiative Transfer. 2023;302. doi:10.1016/j.jqsrt.2023.108557 apa: Alhaddad, S., Förstner, J., & Grynko, Y. (2023). Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength. Journal of Quantitative Spectroscopy and Radiative Transfer, 302, Article 108557. https://doi.org/10.1016/j.jqsrt.2023.108557 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={10.1016/j.jqsrt.2023.108557}, number={108557}, journal={Journal of Quantitative Spectroscopy and Radiative Transfer}, publisher={Elsevier BV}, author={Alhaddad, Samer and Förstner, Jens and Grynko, Yevgen}, year={2023} }' chicago: Alhaddad, Samer, Jens Förstner, and Yevgen Grynko. “Numerical Study of Light Backscattering from Layers of Absorbing Irregular Particles Larger than the Wavelength.” Journal of Quantitative Spectroscopy and Radiative Transfer 302 (2023). https://doi.org/10.1016/j.jqsrt.2023.108557. ieee: 'S. Alhaddad, J. Förstner, and Y. Grynko, “Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength,” Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 302, Art. no. 108557, 2023, doi: 10.1016/j.jqsrt.2023.108557.' mla: Alhaddad, Samer, et al. “Numerical Study of Light Backscattering from Layers of Absorbing Irregular Particles Larger than the Wavelength.” Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 302, 108557, Elsevier BV, 2023, doi:10.1016/j.jqsrt.2023.108557. short: S. Alhaddad, J. Förstner, Y. Grynko, Journal of Quantitative Spectroscopy and Radiative Transfer 302 (2023). date_created: 2023-03-14T12:32:54Z date_updated: 2023-03-15T17:36:13Z ddc: - '530' department: - _id: '61' doi: 10.1016/j.jqsrt.2023.108557 file: - access_level: local content_type: application/pdf creator: fossie date_created: 2023-03-15T15:58:15Z date_updated: 2023-03-15T15:58:15Z file_id: '43028' file_name: 2023-03 Alhaddad - JQSRT - Numerical study of light backscattering from layers of absorbing particles larger than the wavelength.pdf file_size: 1508833 relation: main_file - access_level: open_access content_type: application/pdf creator: fossie date_created: 2023-03-15T17:35:29Z date_updated: 2023-03-15T17:35:29Z file_id: '43029' file_name: 2023-03 Alhaddad - JQSRT - Numerical study of light backscattering from layers of absorbing particles larger than the wavelength (accepted manuscript).pdf file_size: 4254386 relation: main_file file_date_updated: 2023-03-15T17:35:29Z has_accepted_license: '1' intvolume: ' 302' keyword: - tet_topic_scattering language: - iso: eng oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Journal of Quantitative Spectroscopy and Radiative Transfer publication_identifier: issn: - 0022-4073 publication_status: published publisher: Elsevier BV status: public title: Numerical study of light backscattering from layers of absorbing irregular particles larger than the wavelength type: journal_article user_id: '158' volume: 302 year: '2023' ... --- _id: '29075' abstract: - lang: eng 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. author: - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Henna full_name: Farheen, Henna last_name: Farheen - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: 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. Optics Letters. 2022;47(1):58. doi:10.1364/ol.444953 apa: Alhaddad, S., Grynko, Y., Farheen, H., & Förstner, J. (2022). Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles. Optics Letters, 47(1), 58. https://doi.org/10.1364/ol.444953 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={10.1364/ol.444953}, number={1}, journal={Optics Letters}, author={Alhaddad, Samer and Grynko, Yevgen and Farheen, Henna and Förstner, Jens}, year={2022}, pages={58} }' 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.” Optics Letters 47, no. 1 (2022): 58. https://doi.org/10.1364/ol.444953.' 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,” Optics Letters, vol. 47, no. 1, p. 58, 2022, doi: 10.1364/ol.444953.' mla: Alhaddad, Samer, et al. “Numerical Analysis of the Coherent Mechanism Producing Negative Polarization at Backscattering from Systems of Absorbing Particles.” Optics Letters, vol. 47, no. 1, 2022, p. 58, doi:10.1364/ol.444953. short: S. Alhaddad, Y. Grynko, H. Farheen, J. Förstner, Optics Letters 47 (2022) 58. date_created: 2021-12-21T13:49:29Z date_updated: 2022-01-06T06:58:46Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1364/ol.444953 file: - access_level: local content_type: application/pdf creator: fossie date_created: 2021-12-21T13:53:47Z date_updated: 2021-12-21T13:53:47Z embargo: 2022-12-21 embargo_to: open_access file_id: '29076' file_name: 2022-01 Alhaddad - Optics Letter - Double Scattering.pdf file_size: 3197213 relation: main_file file_date_updated: 2021-12-21T13:53:47Z has_accepted_license: '1' intvolume: ' 47' issue: '1' keyword: - tet_topic_scattering language: - iso: eng page: '58' project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Optics Letters publication_identifier: issn: - 0146-9592 - 1539-4794 publication_status: published status: public title: Numerical analysis of the coherent mechanism producing negative polarization at backscattering from systems of absorbing particles type: journal_article user_id: '158' volume: 47 year: '2022' ... --- _id: '34136' author: - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Yuriy full_name: Shkuratov, Yuriy last_name: Shkuratov - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: 'Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Light backscattering from numerical analog of planetary regoliths. In: Copernicus GmbH; 2022. doi:  10.5194/epsc2022-151' apa: Grynko, Y., Shkuratov, Y., Alhaddad, S., & Förstner, J. (2022). Light backscattering from numerical analog of planetary regoliths. 16th Europlanet Science Congress 2022, Granada, Spain. https://doi.org/  10.5194/epsc2022-151 bibtex: '@inproceedings{Grynko_Shkuratov_Alhaddad_Förstner_2022, title={Light backscattering from numerical analog of planetary regoliths}, DOI={  10.5194/epsc2022-151}, publisher={Copernicus GmbH}, author={Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}, year={2022} }' chicago: Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Light Backscattering from Numerical Analog of Planetary Regoliths.” Copernicus GmbH, 2022. https://doi.org/  10.5194/epsc2022-151. 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:   10.5194/epsc2022-151.' mla: Grynko, Yevgen, et al. Light Backscattering from Numerical Analog of Planetary Regoliths. Copernicus GmbH, 2022, doi:  10.5194/epsc2022-151. short: 'Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, in: Copernicus GmbH, 2022.' conference: end_date: 2022-09-23 location: Granada, Spain name: 16th Europlanet Science Congress 2022 start_date: 2022-09-18 date_created: 2022-11-23T12:03:29Z date_updated: 2022-11-23T12:09:03Z ddc: - '530' department: - _id: '61' - _id: '230' doi: ' 10.5194/epsc2022-151' file: - access_level: open_access content_type: application/pdf creator: fossie date_created: 2022-11-23T12:07:10Z date_updated: 2022-11-23T12:07:10Z file_id: '34137' file_name: 2022-09 Grynko - EPSC2022 conference -151-print.pdf file_size: 645190 relation: main_file file_date_updated: 2022-11-23T12:07:10Z has_accepted_license: '1' keyword: - tet_topic_scattering language: - iso: eng oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication_status: published publisher: Copernicus GmbH status: public title: Light backscattering from numerical analog of planetary regoliths type: conference_abstract user_id: '158' year: '2022' ... --- _id: '31574' 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. author: - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Yuriy full_name: Shkuratov, Yuriy last_name: Shkuratov - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Negative polarization of light at backscattering from a numerical analog of planetary regoliths. Icarus. 2022;384:115099. doi:10.1016/j.icarus.2022.115099 apa: Grynko, Y., Shkuratov, Y., Alhaddad, S., & Förstner, J. (2022). Negative polarization of light at backscattering from a numerical analog of planetary regoliths. Icarus, 384, 115099. https://doi.org/10.1016/j.icarus.2022.115099 bibtex: '@article{Grynko_Shkuratov_Alhaddad_Förstner_2022, title={Negative polarization of light at backscattering from a numerical analog of planetary regoliths}, volume={384}, DOI={10.1016/j.icarus.2022.115099}, journal={Icarus}, publisher={Elsevier BV}, author={Grynko, Yevgen and Shkuratov, Yuriy and Alhaddad, Samer and Förstner, Jens}, year={2022}, pages={115099} }' chicago: 'Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Negative Polarization of Light at Backscattering from a Numerical Analog of Planetary Regoliths.” Icarus 384 (2022): 115099. https://doi.org/10.1016/j.icarus.2022.115099.' ieee: 'Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Negative polarization of light at backscattering from a numerical analog of planetary regoliths,” Icarus, vol. 384, p. 115099, 2022, doi: 10.1016/j.icarus.2022.115099.' mla: Grynko, Yevgen, et al. “Negative Polarization of Light at Backscattering from a Numerical Analog of Planetary Regoliths.” Icarus, vol. 384, Elsevier BV, 2022, p. 115099, doi:10.1016/j.icarus.2022.115099. short: Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, Icarus 384 (2022) 115099. date_created: 2022-06-01T18:53:35Z date_updated: 2022-06-01T18:57:51Z ddc: - '530' department: - _id: '61' doi: 10.1016/j.icarus.2022.115099 file: - access_level: open_access content_type: application/pdf creator: fossie date_created: 2022-06-01T18:56:44Z date_updated: 2022-06-01T18:56:44Z file_id: '31575' file_name: 2022-06 Grynko - Icarus - Negative polarization of light at backscattering from a numerical analog of planetary regoliths.pdf file_size: 1419286 relation: main_file file_date_updated: 2022-06-01T18:56:44Z has_accepted_license: '1' intvolume: ' 384' keyword: - tet_topic_scattering language: - iso: eng oa: '1' page: '115099' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Icarus publication_identifier: issn: - 0019-1035 publication_status: published publisher: Elsevier BV status: public title: Negative polarization of light at backscattering from a numerical analog of planetary regoliths type: journal_article user_id: '158' volume: 384 year: '2022' ... --- _id: '33466' abstract: - lang: eng 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.' author: - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Yuriy full_name: Shkuratov, Yuriy last_name: Shkuratov - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: 'Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Light Scattering by Large Densely Packed Clusters of Particles. In: Kokhanovsky A, ed. Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media. Vol 8. Springer Series in Light Scattering. Springer International Publishing; 2022. doi:10.1007/978-3-031-10298-1_4' apa: 'Grynko, Y., Shkuratov, Y., Alhaddad, S., & Förstner, J. (2022). Light Scattering by Large Densely Packed Clusters of Particles. In A. Kokhanovsky (Ed.), Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media (Vol. 8). Springer International Publishing. https://doi.org/10.1007/978-3-031-10298-1_4' 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={10.1007/978-3-031-10298-1_4}, 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} }' chicago: 'Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Light Scattering by Large Densely Packed Clusters of Particles.” In Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media, edited by Alexander Kokhanovsky, Vol. 8. Springer Series in Light Scattering. Cham: Springer International Publishing, 2022. https://doi.org/10.1007/978-3-031-10298-1_4.' ieee: 'Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Light Scattering by Large Densely Packed Clusters of Particles,” in Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media, vol. 8, A. Kokhanovsky, Ed. Cham: Springer International Publishing, 2022.' mla: 'Grynko, Yevgen, et al. “Light Scattering by Large Densely Packed Clusters of Particles.” Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media, edited by Alexander Kokhanovsky, vol. 8, Springer International Publishing, 2022, doi:10.1007/978-3-031-10298-1_4.' 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.' date_created: 2022-09-22T09:18:45Z date_updated: 2023-01-11T15:28:17Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1007/978-3-031-10298-1_4 editor: - first_name: Alexander full_name: Kokhanovsky, Alexander last_name: Kokhanovsky file: - access_level: local content_type: application/pdf creator: fossie date_created: 2022-09-22T09:24:45Z date_updated: 2022-09-22T09:24:45Z file_id: '33467' file_name: 2022-09 Grynko - Book chapter on Light Scattering by Large Densely Packed Clusters of Particles.pdf file_size: 1525307 relation: main_file file_date_updated: 2022-09-22T09:24:45Z has_accepted_license: '1' intvolume: ' 8' keyword: - tet_topic_scattering language: - iso: eng main_file_link: - open_access: '1' url: https://rdcu.be/cV5GC oa: '1' place: Cham project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: 'Springer Series in Light Scattering - Volume 8: Light Polarization and Multiple Scattering in Turbid Media' publication_identifier: isbn: - '9783031102974' - '9783031102981' issn: - 2509-2790 - 2509-2804 publication_status: published publisher: Springer International Publishing series_title: Springer Series in Light Scattering status: public title: Light Scattering by Large Densely Packed Clusters of Particles type: book_chapter user_id: '158' volume: 8 year: '2022' ... --- _id: '21587' abstract: - lang: eng text: Solving partial differential equations on unstructured grids is a cornerstone of engineering and scientific computing. Nowadays, heterogeneous parallel platforms with CPUs, GPUs, and FPGAs enable energy-efficient and computationally demanding simulations. We developed the HighPerMeshes C++-embedded Domain-Specific Language (DSL) for bridging the abstraction gap between the mathematical and algorithmic formulation of mesh-based algorithms for PDE problems on the one hand and an increasing number of heterogeneous platforms with their different parallel programming and runtime models on the other hand. Thus, the HighPerMeshes DSL aims at higher productivity in the code development process for multiple target platforms. We introduce the concepts as well as the basic structure of the HighPerMeshes DSL, and demonstrate its usage with three examples, a Poisson and monodomain problem, respectively, solved by the continuous finite element method, and the discontinuous Galerkin method for Maxwell’s equation. The mapping of the abstract algorithmic description onto parallel hardware, including distributed memory compute clusters, is presented. Finally, the achievable performance and scalability are demonstrated for a typical example problem on a multi-core CPU cluster. author: - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Groth, Stefan last_name: Groth - first_name: Daniel full_name: Grünewald, Daniel last_name: Grünewald - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Frank full_name: Hannig, Frank last_name: Hannig - first_name: Tobias full_name: Kenter, Tobias id: '3145' last_name: Kenter - first_name: Franz-Josef full_name: Pfreundt, Franz-Josef last_name: Pfreundt - first_name: Christian full_name: Plessl, Christian id: '16153' last_name: Plessl orcid: 0000-0001-5728-9982 - first_name: Merlind full_name: Schotte, Merlind last_name: Schotte - first_name: Thomas full_name: Steinke, Thomas last_name: Steinke - first_name: Jürgen full_name: Teich, Jürgen last_name: Teich - first_name: Martin full_name: Weiser, Martin last_name: Weiser - first_name: Florian full_name: Wende, Florian last_name: Wende citation: ama: 'Alhaddad S, Förstner J, Groth S, et al. HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids. In: Euro-Par 2020: Parallel Processing Workshops. ; 2021. doi:10.1007/978-3-030-71593-9_15' apa: 'Alhaddad, S., Förstner, J., Groth, S., Grünewald, D., Grynko, Y., Hannig, F., Kenter, T., Pfreundt, F.-J., Plessl, C., Schotte, M., Steinke, T., Teich, J., Weiser, M., & Wende, F. (2021). HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids. In Euro-Par 2020: Parallel Processing Workshops. https://doi.org/10.1007/978-3-030-71593-9_15' bibtex: '@inbook{Alhaddad_Förstner_Groth_Grünewald_Grynko_Hannig_Kenter_Pfreundt_Plessl_Schotte_et al._2021, place={Cham}, title={HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids}, DOI={10.1007/978-3-030-71593-9_15}, booktitle={Euro-Par 2020: Parallel Processing Workshops}, author={Alhaddad, Samer and Förstner, Jens and Groth, Stefan and Grünewald, Daniel and Grynko, Yevgen and Hannig, Frank and Kenter, Tobias and Pfreundt, Franz-Josef and Plessl, Christian and Schotte, Merlind and et al.}, year={2021} }' chicago: 'Alhaddad, Samer, Jens Förstner, Stefan Groth, Daniel Grünewald, Yevgen Grynko, Frank Hannig, Tobias Kenter, et al. “HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids.” In Euro-Par 2020: Parallel Processing Workshops. Cham, 2021. https://doi.org/10.1007/978-3-030-71593-9_15.' ieee: 'S. Alhaddad et al., “HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids,” in Euro-Par 2020: Parallel Processing Workshops, Cham, 2021.' mla: 'Alhaddad, Samer, et al. “HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids.” Euro-Par 2020: Parallel Processing Workshops, 2021, doi:10.1007/978-3-030-71593-9_15.' short: 'S. Alhaddad, J. Förstner, S. Groth, D. Grünewald, Y. Grynko, F. Hannig, T. Kenter, F.-J. Pfreundt, C. Plessl, M. Schotte, T. Steinke, J. Teich, M. Weiser, F. Wende, in: Euro-Par 2020: Parallel Processing Workshops, Cham, 2021.' date_created: 2021-03-31T19:39:42Z date_updated: 2023-09-26T11:40:25Z ddc: - '004' department: - _id: '61' - _id: '230' - _id: '429' - _id: '27' - _id: '518' doi: 10.1007/978-3-030-71593-9_15 file: - access_level: closed content_type: application/pdf creator: fossie date_created: 2021-03-31T19:42:52Z date_updated: 2021-03-31T19:42:52Z file_id: '21588' file_name: 2021-03 Alhaddad2021_Chapter_HighPerMeshesADomain-SpecificL.pdf file_size: 564398 relation: main_file success: 1 file_date_updated: 2021-03-31T19:42:52Z has_accepted_license: '1' keyword: - tet_topic_hpc language: - iso: eng place: Cham project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: 'Euro-Par 2020: Parallel Processing Workshops' publication_identifier: isbn: - '9783030715922' - '9783030715939' issn: - 0302-9743 - 1611-3349 publication_status: published quality_controlled: '1' status: public title: HighPerMeshes – A Domain-Specific Language for Numerical Algorithms on Unstructured Grids type: book_chapter user_id: '15278' year: '2021' ... --- _id: '24788' author: - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Groth, Stefan last_name: Groth - first_name: Daniel full_name: Grünewald, Daniel last_name: Grünewald - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Frank full_name: Hannig, Frank last_name: Hannig - first_name: Tobias full_name: Kenter, Tobias id: '3145' last_name: Kenter - first_name: Franz‐Josef full_name: Pfreundt, Franz‐Josef last_name: Pfreundt - first_name: Christian full_name: Plessl, Christian id: '16153' last_name: Plessl orcid: 0000-0001-5728-9982 - first_name: Merlind full_name: Schotte, Merlind last_name: Schotte - first_name: Thomas full_name: Steinke, Thomas last_name: Steinke - first_name: Jürgen full_name: Teich, Jürgen last_name: Teich - first_name: Martin full_name: Weiser, Martin last_name: Weiser - first_name: Florian full_name: Wende, Florian last_name: Wende citation: ama: 'Alhaddad S, Förstner J, Groth S, et al. The HighPerMeshes framework for numerical algorithms on unstructured grids. Concurrency and Computation: Practice and Experience. Published online 2021:e6616. doi:10.1002/cpe.6616' apa: 'Alhaddad, S., Förstner, J., Groth, S., Grünewald, D., Grynko, Y., Hannig, F., Kenter, T., Pfreundt, F., Plessl, C., Schotte, M., Steinke, T., Teich, J., Weiser, M., & Wende, F. (2021). The HighPerMeshes framework for numerical algorithms on unstructured grids. Concurrency and Computation: Practice and Experience, e6616. https://doi.org/10.1002/cpe.6616' bibtex: '@article{Alhaddad_Förstner_Groth_Grünewald_Grynko_Hannig_Kenter_Pfreundt_Plessl_Schotte_et al._2021, title={The HighPerMeshes framework for numerical algorithms on unstructured grids}, DOI={10.1002/cpe.6616}, journal={Concurrency and Computation: Practice and Experience}, author={Alhaddad, Samer and Förstner, Jens and Groth, Stefan and Grünewald, Daniel and Grynko, Yevgen and Hannig, Frank and Kenter, Tobias and Pfreundt, Franz‐Josef and Plessl, Christian and Schotte, Merlind and et al.}, year={2021}, pages={e6616} }' chicago: 'Alhaddad, Samer, Jens Förstner, Stefan Groth, Daniel Grünewald, Yevgen Grynko, Frank Hannig, Tobias Kenter, et al. “The HighPerMeshes Framework for Numerical Algorithms on Unstructured Grids.” Concurrency and Computation: Practice and Experience, 2021, e6616. https://doi.org/10.1002/cpe.6616.' ieee: 'S. Alhaddad et al., “The HighPerMeshes framework for numerical algorithms on unstructured grids,” Concurrency and Computation: Practice and Experience, p. e6616, 2021, doi: 10.1002/cpe.6616.' mla: 'Alhaddad, Samer, et al. “The HighPerMeshes Framework for Numerical Algorithms on Unstructured Grids.” Concurrency and Computation: Practice and Experience, 2021, p. e6616, doi:10.1002/cpe.6616.' short: 'S. Alhaddad, J. Förstner, S. Groth, D. Grünewald, Y. Grynko, F. Hannig, T. Kenter, F. Pfreundt, C. Plessl, M. Schotte, T. Steinke, J. Teich, M. Weiser, F. Wende, Concurrency and Computation: Practice and Experience (2021) e6616.' date_created: 2021-09-22T06:15:50Z date_updated: 2023-09-26T11:42:19Z ddc: - '004' department: - _id: '61' - _id: '230' - _id: '27' - _id: '518' doi: 10.1002/cpe.6616 file: - access_level: open_access content_type: application/pdf creator: fossie date_created: 2021-09-22T06:19:29Z date_updated: 2021-09-22T06:19:29Z file_id: '24789' file_name: 2021-09 Alhaddad - Concurrency... - The HighPerMeshes framework for numerical algorithms on unstructured grids.pdf file_size: 2300152 relation: main_file file_date_updated: 2021-09-22T06:19:29Z has_accepted_license: '1' keyword: - tet_topic_hpc language: - iso: eng oa: '1' page: e6616 project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '33' grant_number: 01|H16005A name: HighPerMeshes publication: 'Concurrency and Computation: Practice and Experience' publication_identifier: issn: - 1532-0626 - 1532-0634 publication_status: published quality_controlled: '1' status: public title: The HighPerMeshes framework for numerical algorithms on unstructured grids type: journal_article user_id: '15278' year: '2021' ... --- _id: '3588' abstract: - lang: eng text: 'In scientific computing, unstructured meshes are a crucial foundation for the simulation of real-world physical phenomena. Compared to regular grids, they allow resembling the computational domain with a much higher accuracy, which in turn leads to more efficient computations.
There exists a wealth of supporting libraries and frameworks that aid programmers with the implementation of applications working on such grids, each built on top of existing parallelization technologies. However, many approaches require the programmer to introduce a different programming paradigm into their application or provide different variants of the code. SYCL is a new programming standard providing a remedy to this dilemma by building on standard C ++17 with its so-called single-source approach: Programmers write standard C ++ code and expose parallelism using C++17 keywords. The application is
then transformed into a concrete implementation by the SYCL implementation. By encapsulating the OpenCL ecosystem, different SYCL implementations enable not only the programming of CPUs but also of heterogeneous platforms such as GPUs or other devices. For the first time, this paper showcases a SYCL-
based solver for the nodal Discontinuous Galerkin method for Maxwell’s equations on unstructured meshes. We compare our solution to a previous C-based implementation with respect to programmability and performance on heterogeneous platforms.Proceedings of the 29th Annual IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP). ; 2018:49-56. doi:10.1109/ASAP.2018.8445127' apa: 'Afzal, A., Schmitt, C., Alhaddad, S., Grynko, Y., Teich, J., Förstner, J., & Hannig, F. (2018). Solving Maxwell’s Equations with Modern C++ and SYCL: A Case Study. In Proceedings of the 29th Annual IEEE International Conference on Application-specific Systems, Architectures and Processors (ASAP) (pp. 49–56). https://doi.org/10.1109/ASAP.2018.8445127' bibtex: '@inproceedings{Afzal_Schmitt_Alhaddad_Grynko_Teich_Förstner_Hannig_2018, title={Solving Maxwell’s Equations with Modern C++ and SYCL: A Case Study}, DOI={10.1109/ASAP.2018.8445127}, booktitle={Proceedings of the 29th Annual IEEE International Conference on Application-specific Systems, Architectures and Processors (ASAP)}, author={Afzal, Ayesha and Schmitt, Christian and Alhaddad, Samer and Grynko, Yevgen and Teich, Jürgen and Förstner, Jens and Hannig, Frank}, year={2018}, pages={49–56} }' chicago: 'Afzal, Ayesha, Christian Schmitt, Samer Alhaddad, Yevgen Grynko, Jürgen Teich, Jens Förstner, and Frank Hannig. “Solving Maxwell’s Equations with Modern C++ and SYCL: A Case Study.” In Proceedings of the 29th Annual IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP), 49–56, 2018. https://doi.org/10.1109/ASAP.2018.8445127.' ieee: 'A. Afzal et al., “Solving Maxwell’s Equations with Modern C++ and SYCL: A Case Study,” in Proceedings of the 29th Annual IEEE International Conference on Application-specific Systems, Architectures and Processors (ASAP), 2018, pp. 49–56.' mla: 'Afzal, Ayesha, et al. “Solving Maxwell’s Equations with Modern C++ and SYCL: A Case Study.” Proceedings of the 29th Annual IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP), 2018, pp. 49–56, doi:10.1109/ASAP.2018.8445127.' short: 'A. Afzal, C. Schmitt, S. Alhaddad, Y. Grynko, J. Teich, J. Förstner, F. Hannig, in: Proceedings of the 29th Annual IEEE International Conference on Application-Specific Systems, Architectures and Processors (ASAP), 2018, pp. 49–56.' date_created: 2018-07-23T07:12:03Z date_updated: 2022-01-06T06:59:26Z ddc: - '004' department: - _id: '61' doi: 10.1109/ASAP.2018.8445127 file: - access_level: request content_type: application/pdf creator: fossie date_created: 2018-08-21T10:12:05Z date_updated: 2022-01-06T06:59:26Z embargo: 2019-09-03 embargo_to: open_access file_id: '3986' file_name: 2018-08 Afzal - ASAP Proceedings - Solving Maxwell equations with modern C++ and SYCL.pdf file_size: 252186 relation: main_file file_date_updated: 2022-01-06T06:59:26Z has_accepted_license: '1' keyword: - tet_topic_hpc language: - iso: eng page: 49-56 project: - _id: '33' grant_number: 01|H16005 name: HighPerMeshes - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing publication: Proceedings of the 29th Annual IEEE International Conference on Application-specific Systems, Architectures and Processors (ASAP) publication_identifier: isbn: - 978-1-5386-7479-6 status: public title: 'Solving Maxwell''s Equations with Modern C++ and SYCL: A Case Study' type: conference user_id: '158' year: '2018' ... --- _id: '4579' abstract: - lang: eng text: Semi-guided waves confined in dielectric slab waveguides are being considered for oblique angles of propagation. If the waves encounter a linear discontinuity of (mostly) arbitrary shape and extension, a variant of Snell's law applies, separately for each pair of incoming and outgoing modes. Depending on the effective indices involved, and on the angle of incidence, power transfer to specific outgoing waves can be allowed or forbidden. In particular, critical angles of incidence can be identified, beyond which any power transfer to non-guided waves is forbidden, i.e. all radiative losses are suppressed. In that case the input power is carried away from the discontinuity exclusively by reflected semi-guided waves in the input slab, or by semi-guided waves that are transmitted into other outgoing slab waveguides. Vectorial equations on a 2-D cross sectional domain apply. These are formally identical to the equations that govern the eigenmodes of 3-D channel waveguides. Here, however, these need to be solved not as an eigenvalue problem, but as an inhomogeneous problem with a right-hand-side that is given by the incoming semi-guided wave, and subject to transparent boundary conditions. The equations resemble a standard 2-D Helmholtz problem, with an effective permittivity in place of the actual relative permittivity. Depending on the properties of the incoming wave, including the angle of incidence, this effective permittivity can become locally negative, causing the suppression of propagating outgoing waves. A series of high-contrast example configurations are discussed, where these effects lead to - in some respects - quite surprising transmission characteristics. author: - first_name: Manfred full_name: Hammer, Manfred id: '48077' last_name: Hammer orcid: 0000-0002-6331-9348 - first_name: Lena full_name: Ebers, Lena id: '40428' last_name: Ebers - first_name: Andre full_name: Hildebrandt, Andre last_name: Hildebrandt - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: 'Hammer M, Ebers L, Hildebrandt A, Alhaddad S, Förstner J. Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET). IEEE; 2018. doi:10.1109/mmet.2018.8460455' apa: 'Hammer, M., Ebers, L., Hildebrandt, A., Alhaddad, S., & Förstner, J. (2018). Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity. In 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET). IEEE. https://doi.org/10.1109/mmet.2018.8460455' bibtex: '@inproceedings{Hammer_Ebers_Hildebrandt_Alhaddad_Förstner_2018, title={Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity}, DOI={10.1109/mmet.2018.8460455}, booktitle={2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)}, publisher={IEEE}, author={Hammer, Manfred and Ebers, Lena and Hildebrandt, Andre and Alhaddad, Samer and Förstner, Jens}, year={2018} }' chicago: 'Hammer, Manfred, Lena Ebers, Andre Hildebrandt, Samer Alhaddad, and Jens Förstner. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” In 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET). IEEE, 2018. https://doi.org/10.1109/mmet.2018.8460455.' ieee: 'M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, and J. Förstner, “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity,” in 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), 2018.' mla: 'Hammer, Manfred, et al. “Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity.” 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), IEEE, 2018, doi:10.1109/mmet.2018.8460455.' short: 'M. Hammer, L. Ebers, A. Hildebrandt, S. Alhaddad, J. Förstner, in: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET), IEEE, 2018.' date_created: 2018-10-02T17:11:59Z date_updated: 2022-01-06T07:01:13Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1109/mmet.2018.8460455 file: - access_level: closed content_type: application/pdf creator: fossie date_created: 2018-10-02T17:13:55Z date_updated: 2018-10-02T17:13:55Z file_id: '4580' file_name: 2018-09 Hammer - MMET (final draft).pdf file_size: 242956 relation: main_file success: 1 file_date_updated: 2018-10-02T17:13:55Z has_accepted_license: '1' keyword: - tet_topic_waveguides project: - _id: '53' name: TRR 142 - _id: '56' name: TRR 142 - Project Area C - _id: '75' name: TRR 142 - Subproject C5 publication: 2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET) publication_identifier: isbn: - '9781538654385' publication_status: published publisher: IEEE status: public title: 'Oblique Semi-Guided Waves: 2-D Integrated Photonics with Negative Effective Permittivity' type: conference user_id: '158' year: '2018' ... --- _id: '1588' abstract: - lang: eng text: The exploration of FPGAs as accelerators for scientific simulations has so far mostly been focused on small kernels of methods working on regular data structures, for example in the form of stencil computations for finite difference methods. In computational sciences, often more advanced methods are employed that promise better stability, convergence, locality and scaling. Unstructured meshes are shown to be more effective and more accurate, compared to regular grids, in representing computation domains of various shapes. Using unstructured meshes, the discontinuous Galerkin method preserves the ability to perform explicit local update operations for simulations in the time domain. In this work, we investigate FPGAs as target platform for an implementation of the nodal discontinuous Galerkin method to find time-domain solutions of Maxwell's equations in an unstructured mesh. When maximizing data reuse and fitting constant coefficients into suitably partitioned on-chip memory, high computational intensity allows us to implement and feed wide data paths with hundreds of floating point operators. By decoupling off-chip memory accesses from the computations, high memory bandwidth can be sustained, even for the irregular access pattern required by parts of the application. Using the Intel/Altera OpenCL SDK for FPGAs, we present different implementation variants for different polynomial orders of the method. In different phases of the algorithm, either computational or bandwidth limits of the Arria 10 platform are almost reached, thus outperforming a highly multithreaded CPU implementation by around 2x. author: - first_name: Tobias full_name: Kenter, Tobias id: '3145' last_name: Kenter - first_name: Gopinath full_name: Mahale, Gopinath last_name: Mahale - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Yevgen full_name: Grynko, Yevgen id: '26059' last_name: Grynko - first_name: Christian full_name: Schmitt, Christian last_name: Schmitt - first_name: Ayesha full_name: Afzal, Ayesha last_name: Afzal - first_name: Frank full_name: Hannig, Frank last_name: Hannig - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Christian full_name: Plessl, Christian id: '16153' last_name: Plessl orcid: 0000-0001-5728-9982 citation: ama: 'Kenter T, Mahale G, Alhaddad S, et al. OpenCL-based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes. In: Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM). IEEE; 2018. doi:10.1109/FCCM.2018.00037' apa: Kenter, T., Mahale, G., Alhaddad, S., Grynko, Y., Schmitt, C., Afzal, A., Hannig, F., Förstner, J., & Plessl, C. (2018). OpenCL-based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes. Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM). Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM). https://doi.org/10.1109/FCCM.2018.00037 bibtex: '@inproceedings{Kenter_Mahale_Alhaddad_Grynko_Schmitt_Afzal_Hannig_Förstner_Plessl_2018, title={OpenCL-based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes}, DOI={10.1109/FCCM.2018.00037}, booktitle={Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM)}, publisher={IEEE}, author={Kenter, Tobias and Mahale, Gopinath and Alhaddad, Samer and Grynko, Yevgen and Schmitt, Christian and Afzal, Ayesha and Hannig, Frank and Förstner, Jens and Plessl, Christian}, year={2018} }' chicago: Kenter, Tobias, Gopinath Mahale, Samer Alhaddad, Yevgen Grynko, Christian Schmitt, Ayesha Afzal, Frank Hannig, Jens Förstner, and Christian Plessl. “OpenCL-Based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes.” In Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM). IEEE, 2018. https://doi.org/10.1109/FCCM.2018.00037. ieee: 'T. Kenter et al., “OpenCL-based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes,” presented at the Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM), 2018, doi: 10.1109/FCCM.2018.00037.' mla: Kenter, Tobias, et al. “OpenCL-Based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes.” Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM), IEEE, 2018, doi:10.1109/FCCM.2018.00037. short: 'T. Kenter, G. Mahale, S. Alhaddad, Y. Grynko, C. Schmitt, A. Afzal, F. Hannig, J. Förstner, C. Plessl, in: Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM), IEEE, 2018.' conference: name: Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM) date_created: 2018-03-22T10:48:01Z date_updated: 2023-09-26T11:47:52Z ddc: - '000' department: - _id: '27' - _id: '518' - _id: '61' doi: 10.1109/FCCM.2018.00037 file: - access_level: closed content_type: application/pdf creator: ups date_created: 2018-11-02T14:45:05Z date_updated: 2018-11-02T14:45:05Z file_id: '5282' file_name: 08457652.pdf file_size: 269130 relation: main_file success: 1 file_date_updated: 2018-11-02T14:45:05Z has_accepted_license: '1' keyword: - tet_topic_hpc language: - iso: eng project: - _id: '33' grant_number: 01|H16005A name: HighPerMeshes - _id: '1' grant_number: '160364472' name: SFB 901 - _id: '4' name: SFB 901 - Project Area C - _id: '14' grant_number: '160364472' name: SFB 901 - Subproject C2 publication: Proc. Int. Symp. on Field-Programmable Custom Computing Machines (FCCM) publisher: IEEE quality_controlled: '1' status: public title: OpenCL-based FPGA Design to Accelerate the Nodal Discontinuous Galerkin Method for Unstructured Meshes type: conference user_id: '15278' year: '2018' ... --- _id: '3543' author: - first_name: Andre full_name: Hildebrandt, Andre last_name: Hildebrandt - first_name: Samer full_name: Alhaddad, Samer id: '42456' last_name: Alhaddad - first_name: Manfred full_name: Hammer, Manfred id: '48077' last_name: Hammer orcid: 0000-0002-6331-9348 - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: 'Hildebrandt A, Alhaddad S, Hammer M, Förstner J. Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits. In: Broquin J-E, Nunzi Conti G, eds. Integrated Optics: Devices, Materials, and Technologies XX. SPIE; 2016. doi:10.1117/12.2214460' apa: 'Hildebrandt, A., Alhaddad, S., Hammer, M., & Förstner, J. (2016). Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits. In J.-E. Broquin & G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX. SPIE. https://doi.org/10.1117/12.2214460' bibtex: '@inproceedings{Hildebrandt_Alhaddad_Hammer_Förstner_2016, title={Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits}, DOI={10.1117/12.2214460}, booktitle={Integrated Optics: Devices, Materials, and Technologies XX}, publisher={SPIE}, author={Hildebrandt, Andre and Alhaddad, Samer and Hammer, Manfred and Förstner, Jens}, editor={Broquin, Jean-Emmanuel and Nunzi Conti, GualtieroEditors}, year={2016} }' chicago: 'Hildebrandt, Andre, Samer Alhaddad, Manfred Hammer, and Jens Förstner. “Oblique Incidence of Semi-Guided Waves on Step-like Folds in Planar Dielectric Slabs: Lossless Vertical Interconnects in 3D Integrated Photonic Circuits.” In Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti. SPIE, 2016. https://doi.org/10.1117/12.2214460.' ieee: 'A. Hildebrandt, S. Alhaddad, M. Hammer, and J. Förstner, “Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits,” in Integrated Optics: Devices, Materials, and Technologies XX, 2016.' mla: 'Hildebrandt, Andre, et al. “Oblique Incidence of Semi-Guided Waves on Step-like Folds in Planar Dielectric Slabs: Lossless Vertical Interconnects in 3D Integrated Photonic Circuits.” Integrated Optics: Devices, Materials, and Technologies XX, edited by Jean-Emmanuel Broquin and Gualtiero Nunzi Conti, SPIE, 2016, doi:10.1117/12.2214460.' short: 'A. Hildebrandt, S. Alhaddad, M. Hammer, J. Förstner, in: J.-E. Broquin, G. Nunzi Conti (Eds.), Integrated Optics: Devices, Materials, and Technologies XX, SPIE, 2016.' date_created: 2018-07-11T09:35:06Z date_updated: 2022-01-06T06:59:23Z ddc: - '530' department: - _id: '61' - _id: '230' - _id: '429' doi: 10.1117/12.2214460 editor: - first_name: Jean-Emmanuel full_name: Broquin, Jean-Emmanuel last_name: Broquin - first_name: Gualtiero full_name: Nunzi Conti, Gualtiero last_name: Nunzi Conti file: - access_level: closed content_type: application/pdf creator: fossie date_created: 2018-07-11T09:38:29Z date_updated: 2018-07-11T09:38:29Z file_id: '3544' file_name: 2016-02 Hildebrandt SPIE OPTO 2016.pdf file_size: 1239213 relation: main_file success: 1 file_date_updated: 2018-07-11T09:38:29Z has_accepted_license: '1' keyword: - tet_topic_waveguide language: - iso: eng publication: 'Integrated Optics: Devices, Materials, and Technologies XX' publication_status: published publisher: SPIE status: public title: 'Oblique incidence of semi-guided waves on step-like folds in planar dielectric slabs: Lossless vertical interconnects in 3D integrated photonic circuits' type: conference user_id: '158' year: '2016' ...