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dc.contributor.authorAkın, O.en_US
dc.contributor.authorDemir, H. V.en_US
dc.date.accessioned2018-04-12T11:06:29Z
dc.date.available2018-04-12T11:06:29Z
dc.date.issued2017en_US
dc.identifier.issn0003-6951
dc.identifier.urihttp://hdl.handle.net/11693/37225
dc.description.abstractHigh-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.en_US
dc.language.isoEnglishen_US
dc.source.titleApplied Physics Lettersen_US
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.4979664en_US
dc.subjectCrosstalken_US
dc.subjectEfficiencyen_US
dc.subjectFocal plane arraysen_US
dc.subjectFocusingen_US
dc.subjectMicrolensesen_US
dc.subjectMicroopticsen_US
dc.subjectOptical instrument lensesen_US
dc.subjectPixelsen_US
dc.subjectPolarizationen_US
dc.subjectCross polarizationsen_US
dc.subjectCrosstalk suppressionen_US
dc.subjectDevice performanceen_US
dc.subjectFigure of merit (FOM)en_US
dc.subjectFull wave solutionsen_US
dc.subjectMid wave infrared (MWIR)en_US
dc.subjectOptical cross-talken_US
dc.subjectOptical resolutionen_US
dc.subjectInfrared radiationen_US
dc.titleHigh-efficiency low-crosstalk dielectric metasurfaces of mid-wave infrared focal plane arraysen_US
dc.typeArticleen_US
dc.departmentInstitute of Materials Science and Nanotechnologyen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.citation.spage143106-1en_US
dc.citation.epage143106-5en_US
dc.citation.volumeNumber110en_US
dc.citation.issueNumber14en_US
dc.identifier.doi10.1063/1.4979664en_US
dc.publisherAmerican Institute of Physics Inc.en_US


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