High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays
High-resolution compact-size focal plane arrays (FPAs) suffer the fundamental geometrical tradeoff between the optical resolution (pixel size miniaturization) and the optical crosstalk (spillover of neighboring pixel focusing). For FPAs, our previously reported metallic metasurfaces reached an unpre...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/83337 http://hdl.handle.net/10220/42515 |
| _version_ | 1811683163378810880 |
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| author | Akın, Onur Demir, Hilmi Volkan |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Akın, Onur Demir, Hilmi Volkan |
| author_sort | Akın, Onur |
| collection | NTU |
| description | High-resolution compact-size focal plane arrays (FPAs) suffer the fundamental geometrical tradeoff between the optical resolution (pixel size miniaturization) and the optical crosstalk (spillover of neighboring pixel focusing). For FPAs, our previously reported metallic metasurfaces reached an unprecedented level of crosstalk suppression. However, practical utilization of these metallic microlens arrays has proved to be intrinsically limited due to the low device efficiency (of the order of 0.10) resulting from the fundamental absorption losses of metals and their cross-polarization scheme. Exceeding this limit, here we show highly efficient microlens designs enabled by dielectric metasurfaces for mid-wave infrared (MWIR) operation. These dielectric MWIR FPAs allow for a substantially high device efficiency over 0.80 without compromising the optical crosstalk performance. Systematically studying dielectric nanoantennas of silicon nanodisks that do not dictate the cross-polarization scheme using full-wave solutions, we found that the optical crosstalk is suppressed to low levels ≤≤ 3.0% while sustaining the high efficiency. A figure-of-merit (FoM) defined for the device performance as the focusing efficiency per optical crosstalk times the f-number achieves 84, which is superior to all other types of MWIR FPAs reported to date, all falling below a maximum FoM of 70. These findings indicate that the proposed approach can pave the way for the practical usage of metasurface microlens arrays in MWIR. |
| first_indexed | 2024-10-01T04:08:22Z |
| format | Journal Article |
| id | ntu-10356/83337 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:08:22Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/833372020-03-07T13:57:27Z High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays Akın, Onur Demir, Hilmi Volkan School of Electrical and Electronic Engineering Dielectrics Dielectric devices High-resolution compact-size focal plane arrays (FPAs) suffer the fundamental geometrical tradeoff between the optical resolution (pixel size miniaturization) and the optical crosstalk (spillover of neighboring pixel focusing). For FPAs, our previously reported metallic metasurfaces reached an unprecedented level of crosstalk suppression. However, practical utilization of these metallic microlens arrays has proved to be intrinsically limited due to the low device efficiency (of the order of 0.10) resulting from the fundamental absorption losses of metals and their cross-polarization scheme. Exceeding this limit, here we show highly efficient microlens designs enabled by dielectric metasurfaces for mid-wave infrared (MWIR) operation. These dielectric MWIR FPAs allow for a substantially high device efficiency over 0.80 without compromising the optical crosstalk performance. Systematically studying dielectric nanoantennas of silicon nanodisks that do not dictate the cross-polarization scheme using full-wave solutions, we found that the optical crosstalk is suppressed to low levels ≤≤ 3.0% while sustaining the high efficiency. A figure-of-merit (FoM) defined for the device performance as the focusing efficiency per optical crosstalk times the f-number achieves 84, which is superior to all other types of MWIR FPAs reported to date, all falling below a maximum FoM of 70. These findings indicate that the proposed approach can pave the way for the practical usage of metasurface microlens arrays in MWIR. Published version 2017-05-29T09:28:10Z 2019-12-06T15:20:15Z 2017-05-29T09:28:10Z 2019-12-06T15:20:15Z 2017 Journal Article Akın, O., & Demir, H. V. (2017). High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays. Applied Physics Letters, 110(14), 143106-. 0003-6951 https://hdl.handle.net/10356/83337 http://hdl.handle.net/10220/42515 10.1063/1.4979664 en Applied Physics Letters © 2017 AIP Publishing. This paper was published in Applied Physics Letters and is made available as an electronic reprint (preprint) with permission of AIP Publishing. The published version is available at: [http://dx.doi.org/10.1063/1.4979664]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. 6 p. application/pdf |
| spellingShingle | Dielectrics Dielectric devices Akın, Onur Demir, Hilmi Volkan High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title | High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title_full | High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title_fullStr | High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title_full_unstemmed | High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title_short | High-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arrays |
| title_sort | high efficiency low crosstalk dielectric metasurfaces of mid wave infrared focal plane arrays |
| topic | Dielectrics Dielectric devices |
| url | https://hdl.handle.net/10356/83337 http://hdl.handle.net/10220/42515 |
| work_keys_str_mv | AT akınonur highefficiencylowcrosstalkdielectricmetasurfacesofmidwaveinfraredfocalplanearrays AT demirhilmivolkan highefficiencylowcrosstalkdielectricmetasurfacesofmidwaveinfraredfocalplanearrays |