Please use this identifier to cite or link to this item:
|Title:||Control of LED emission with functional dielectric metasurfaces||Authors:||Khaidarov, Egor
Ha, Son Tung
Png, Ching Eng
Demir, Hilmi Volkan
Kuznetsov, Arseniy I.
|Keywords:||Science::Physics::Optics and light||Issue Date:||2019||Source:||Khaidarov, E., Liu, Z., Paniagua-Domínguez, R., Ha, S. T., Valuckas, V., Liang, X., Akimov, Y., Bai, P., Png, C. E., Demir, H. V. & Kuznetsov, A. I. (2019). Control of LED emission with functional dielectric metasurfaces. Laser and Photonics Reviews, 14(1), 1900235-. https://dx.doi.org/10.1002/lpor.201900235||Journal:||Laser and Photonics Reviews||Abstract:||The 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.||URI:||https://hdl.handle.net/10356/149496||ISSN:||1863-8899||DOI:||10.1002/lpor.201900235||Rights:||This is the peer reviewed version of the following article: Khaidarov, E., Liu, Z., Paniagua-Domínguez, R., Ha, S. T., Valuckas, V., Liang, X., Akimov, Y., Bai, P., Png, C. E., Demir, H. V. & Kuznetsov, A. I. (2019). Control of LED emission with functional dielectric metasurfaces. Laser and Photonics Reviews, 14(1), 1900235-. https://dx.doi.org/10.1002/lpor.201900235 , which has been published in final form at https://doi.org/10.1002/lpor.201900235. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.||Fulltext Permission:||open||Fulltext Availability:||With Fulltext|
|Appears in Collections:||EEE Journal Articles|
Updated on Jan 28, 2023
Web of ScienceTM
Updated on Jan 22, 2023
Updated on Feb 3, 2023
Updated on Feb 3, 2023
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.