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arXiv · 2009.01155

Zinc Sulphide Overlayer Two-Dimensional Photonic Crystal for Enhanced Extraction of Light from a Micro Cavity Light-Emitting Diode

Michael A. Mastro·Chul Soo Kim·Mijin Kim·Josh Caldwell·Ron T. Holm·Igor Vurgaftman·Jihyun Kim·Charles R. Eddy Jr.·Jerry R. Meyer
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Abstract

A two-dimensional (2D) ZnS photonic crystal was deposited on the surface of a one-dimensional (1D) III-nitride micro cavity light-emitting diode (LED), to intermix the light extraction features of both structures (1D+2D). The deposition of an ideal micro-cavity optical thickness of lambda/2 is impractical for III-nitride LEDs, and in realistic multi-mode devices a large fraction of the light is lost to internal refraction as guided light. Therefore, a 2D photonic crystal on the surface of the LED was used to diffract and thus redirect this guided light out of the semiconductor over several hundred microns. Additionally, the employment of a post-epitaxy ZnS 2D photonic crystal avoided the typical etching into the GaN:Mg contact layer, a procedure which can cause damage to the near surface.

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Michael A. Mastro, Chul Soo Kim, Mijin Kim, Josh Caldwell, Ron T. Holm, Igor Vurgaftman, Jihyun Kim, Charles R. Eddy Jr., Jerry R. Meyer. 2020-09-02. Zinc Sulphide Overlayer Two-Dimensional Photonic Crystal for Enhanced Extraction of Light from a Micro Cavity Light-Emitting Diode. https://doi.org/10.1143/jjap.47.7827

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