Control of LED emission with functional dielectric metasurfaces

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage1900235-8en_US
dc.citation.issueNumber1en_US
dc.citation.spage1900235-1en_US
dc.citation.volumeNumber14en_US
dc.contributor.authorKhaidarov, E.
dc.contributor.authorLiu, Z.
dc.contributor.authorPaniagua-Domínguez, R.
dc.contributor.authorHa, S. T.
dc.contributor.authorValuckas, V.
dc.contributor.authorLiang, X.
dc.contributor.authorAkimov, Y.
dc.contributor.authorBai, P.
dc.contributor.authorPng, C. E.
dc.contributor.authorDemir, Hilmi Volkan
dc.contributor.authorKuznetsov, A. I.
dc.date.accessioned2021-02-19T12:17:34Z
dc.date.available2021-02-19T12:17:34Z
dc.date.issued2020
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractThe improvement of light‐emitting diodes (LEDs) is one of the major goals of optoelectronics and photonics research. LED integration to complex photonic devices requires precise control of the wavefront of the emitted light. Metasurfaces are spatial arrangements of engineered scatters that may enable this light manipulation capability with unprecedented resolution. Most of these devices, however, are only able to function properly under irradiation of laser light with a large spatial coherence. LEDs, on the other hand, have angularly broad, Lambertian‐like emission patterns characterized by a low spatial coherence, which makes the integration of metasurface devices on LEDs challenging. A novel concept for metasurface integration on LED is proposed, using a cavity to increase the LED spatial coherence through an angular collimation. The experimental demonstration of the proposed concept is implemented on a GaP LED architecture including a hybrid metallic‐Bragg cavity. By integrating a silicon metasurface on top, two different functionalities of these compact devices are demonstrated: directional LED emission at a desired angle and LED emission of a vortex beam with an orbital angular momentum. The presented concept is general, being applicable to other incoherent light sources and enabling metasurfaces designed for plane waves to work with incoherent light emitters.en_US
dc.description.provenanceSubmitted by Onur Emek (onur.emek@bilkent.edu.tr) on 2021-02-19T12:17:33Z No. of bitstreams: 1 Control_of_LED_Emission_with_Functional_Dielectric_Metasurfaces.pdf: 1080221 bytes, checksum: 08d7c142093dfc99b0dbb53c9651d9c0 (MD5)en
dc.description.provenanceMade available in DSpace on 2021-02-19T12:17:34Z (GMT). No. of bitstreams: 1 Control_of_LED_Emission_with_Functional_Dielectric_Metasurfaces.pdf: 1080221 bytes, checksum: 08d7c142093dfc99b0dbb53c9651d9c0 (MD5) Previous issue date: 2020en
dc.description.sponsorshipA*STAR SERC Pharos program. Grant Number: 152 73 00025 Science and Engineering Research Council. Grant Number: 152 73 00025en_US
dc.description.sponsorshipA*STAR SERC Pharos program. Grant Number: 152 73 00025 Science and Engineering Research Council. Grant Number: 152 73 00025en_US
dc.embargo.release2021-01-01
dc.identifier.doi10.1002/lpor.201900235en_US
dc.identifier.issn1863-8880
dc.identifier.urihttp://hdl.handle.net/11693/75500
dc.language.isoEnglishen_US
dc.publisherWileyen_US
dc.relation.isversionofhttps://dx.doi.org/10.1002/lpor.201900235en_US
dc.source.titleLaser and Photonics Reviewsen_US
dc.titleControl of LED emission with functional dielectric metasurfacesen_US
dc.typeArticleen_US

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