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, Jerry R. Meyer

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

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 ≈λ/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.

Original languageEnglish
Pages (from-to)7827-7830
Number of pages4
JournalJapanese journal of applied physics
Volume47
Issue number10 PART 1
DOIs
Publication statusPublished - 2008 Oct

Keywords

  • GaN
  • Micro cavity light-emitting diode
  • Photonic crystal

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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