{"title":"Broadband optical Ta2O5 antennas for directional emission of light","project":[{"grant_number":"231447078","name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"publication":"Optics Express","abstract":[{"lang":"eng","text":"Highly directive antennas with the ability of shaping radiation patterns in desired directions are essential for efficient on-chip optical communication with reduced cross talk. In this paper, we design and optimize three distinct broadband traveling-wave tantalum pentoxide antennas exhibiting highly directional characteristics. Our antennas contain a director and reflector deposited on a glass substrate, which are excited by a dipole emitter placed in the feed gap between the two elements. Full-wave simulations in conjunction with global optimization provide structures with an enhanced linear directivity as high as 119 radiating in the substrate. The high directivity is a result of the interplay between two dominant TE modes and the leaky modes present in the antenna director. Furthermore, these low-loss dielectric antennas exhibit a near-unity radiation efficiency at the operational wavelength of 780 nm and maintain a broad bandwidth. Our numerical results are in good agreement with experimental measurements from the optimized antennas fabricated using a two-step electron-beam lithography, revealing the highly directive nature of our structures. We envision that our antenna designs can be conveniently adapted to other dielectric materials and prove instrumental for inter-chip optical communications and other on-chip applications."}],"page":"19288","publication_status":"published","volume":30,"doi":"10.1364/oe.455815","citation":{"ama":"Farheen H, Yan L-Y, Quiring V, et al. Broadband optical Ta2O5 antennas for directional emission of light. <i>Optics Express</i>. 2022;30(11):19288. doi:<a href=\"https://doi.org/10.1364/oe.455815\">10.1364/oe.455815</a>","chicago":"Farheen, Henna, Lok-Yee Yan, Viktor Quiring, Christof Eigner, Thomas Zentgraf, Stefan Linden, Jens Förstner, and Viktor Myroshnychenko. “Broadband Optical Ta2O5 Antennas for Directional Emission of Light.” <i>Optics Express</i> 30, no. 11 (2022): 19288. <a href=\"https://doi.org/10.1364/oe.455815\">https://doi.org/10.1364/oe.455815</a>.","short":"H. Farheen, L.-Y. Yan, V. Quiring, C. Eigner, T. Zentgraf, S. Linden, J. Förstner, V. Myroshnychenko, Optics Express 30 (2022) 19288.","ieee":"H. Farheen <i>et al.</i>, “Broadband optical Ta2O5 antennas for directional emission of light,” <i>Optics Express</i>, vol. 30, no. 11, p. 19288, 2022, doi: <a href=\"https://doi.org/10.1364/oe.455815\">10.1364/oe.455815</a>.","apa":"Farheen, H., Yan, L.-Y., Quiring, V., Eigner, C., Zentgraf, T., Linden, S., Förstner, J., &#38; Myroshnychenko, V. (2022). Broadband optical Ta2O5 antennas for directional emission of light. <i>Optics Express</i>, <i>30</i>(11), 19288. <a href=\"https://doi.org/10.1364/oe.455815\">https://doi.org/10.1364/oe.455815</a>","bibtex":"@article{Farheen_Yan_Quiring_Eigner_Zentgraf_Linden_Förstner_Myroshnychenko_2022, title={Broadband optical Ta2O5 antennas for directional emission of light}, volume={30}, DOI={<a href=\"https://doi.org/10.1364/oe.455815\">10.1364/oe.455815</a>}, number={11}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Farheen, Henna and Yan, Lok-Yee and Quiring, Viktor and Eigner, Christof and Zentgraf, Thomas and Linden, Stefan and Förstner, Jens and Myroshnychenko, Viktor}, year={2022}, pages={19288} }","mla":"Farheen, Henna, et al. “Broadband Optical Ta2O5 Antennas for Directional Emission of Light.” <i>Optics Express</i>, vol. 30, no. 11, Optica Publishing Group, 2022, p. 19288, doi:<a href=\"https://doi.org/10.1364/oe.455815\">10.1364/oe.455815</a>."},"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"date_updated":"2024-07-22T07:44:58Z","date_created":"2022-05-18T16:39:17Z","status":"public","intvolume":"        30","user_id":"158","type":"journal_article","publisher":"Optica Publishing Group","language":[{"iso":"eng"}],"publication_identifier":{"issn":["1094-4087"]},"_id":"31329","issue":"11","keyword":["tet_topic_opticalantenna"],"author":[{"orcid":"0000-0001-7730-3489","first_name":"Henna","last_name":"Farheen","full_name":"Farheen, Henna","id":"53444"},{"first_name":"Lok-Yee","full_name":"Yan, Lok-Yee","last_name":"Yan"},{"full_name":"Quiring, Viktor","last_name":"Quiring","first_name":"Viktor"},{"orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","last_name":"Eigner","full_name":"Eigner, Christof","first_name":"Christof"},{"id":"30525","last_name":"Zentgraf","full_name":"Zentgraf, Thomas","first_name":"Thomas","orcid":"0000-0002-8662-1101"},{"first_name":"Stefan","full_name":"Linden, Stefan","last_name":"Linden"},{"id":"158","first_name":"Jens","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862"},{"id":"46371","first_name":"Viktor","full_name":"Myroshnychenko, Viktor","last_name":"Myroshnychenko"}],"year":"2022"}