Anomalous refraction into free space with all-dielectric binary metagratings
Steering the incoming photonic power toward unusual directions, not predicted by Snell's laws of reflection and refraction, is a fundamental operation behind numerous wavefront engineering applications. In this study, strong anomalous transmission is reported to all-dielectric electrically thin...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2020-09-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033526 |
| _version_ | 1797211250930745344 |
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| author | Nikolaos L. Tsitsas Constantinos Valagiannopoulos |
| author_facet | Nikolaos L. Tsitsas Constantinos Valagiannopoulos |
| author_sort | Nikolaos L. Tsitsas |
| collection | DOAJ |
| description | Steering the incoming photonic power toward unusual directions, not predicted by Snell's laws of reflection and refraction, is a fundamental operation behind numerous wavefront engineering applications. In this study, strong anomalous transmission is reported to all-dielectric electrically thin structures comprising only two materials in alternating rectangular posts. These binary metagratings have been thoroughly optimized to support almost perfect negative refraction by suppressing all the rest of diffraction orders; such an effect is found to be very robust with respect to oscillation frequency, incident beam angle, and structural defects. In this way, easy-to-fabricate setups working at different colors of the visible spectrum are determined and may be directly incorporated in various optical integrated systems from lenses and beamformers to field enhancers and power splitters. |
| first_indexed | 2024-04-24T10:23:31Z |
| format | Article |
| id | doaj.art-21b5ee14c37845cfb4710aca3e66df9f |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:23:31Z |
| publishDate | 2020-09-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-21b5ee14c37845cfb4710aca3e66df9f2024-04-12T17:01:39ZengAmerican Physical SocietyPhysical Review Research2643-15642020-09-012303352610.1103/PhysRevResearch.2.033526Anomalous refraction into free space with all-dielectric binary metagratingsNikolaos L. TsitsasConstantinos ValagiannopoulosSteering the incoming photonic power toward unusual directions, not predicted by Snell's laws of reflection and refraction, is a fundamental operation behind numerous wavefront engineering applications. In this study, strong anomalous transmission is reported to all-dielectric electrically thin structures comprising only two materials in alternating rectangular posts. These binary metagratings have been thoroughly optimized to support almost perfect negative refraction by suppressing all the rest of diffraction orders; such an effect is found to be very robust with respect to oscillation frequency, incident beam angle, and structural defects. In this way, easy-to-fabricate setups working at different colors of the visible spectrum are determined and may be directly incorporated in various optical integrated systems from lenses and beamformers to field enhancers and power splitters.http://doi.org/10.1103/PhysRevResearch.2.033526 |
| spellingShingle | Nikolaos L. Tsitsas Constantinos Valagiannopoulos Anomalous refraction into free space with all-dielectric binary metagratings Physical Review Research |
| title | Anomalous refraction into free space with all-dielectric binary metagratings |
| title_full | Anomalous refraction into free space with all-dielectric binary metagratings |
| title_fullStr | Anomalous refraction into free space with all-dielectric binary metagratings |
| title_full_unstemmed | Anomalous refraction into free space with all-dielectric binary metagratings |
| title_short | Anomalous refraction into free space with all-dielectric binary metagratings |
| title_sort | anomalous refraction into free space with all dielectric binary metagratings |
| url | http://doi.org/10.1103/PhysRevResearch.2.033526 |
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