III-nitride deep ultraviolet micro- and nano-photonics

Z. Y. Fan, J. Y. Lin, H. X. Jiang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Recent progresses in epitaxial growth, fundamental studies of high Al content AlGaN alloys with Si and Mg doping, light polarization properties, and deep UV LEDs combined with microlens or photonic crystal structure to improve light extraction are presented. For Si doped Al0.7Ga0.3N, a room temperature n-type resistivity as low as 0.0075 Ω·cm has been obtained. We have also achieved n-AlN with a free electron concentration and mobility of about 1.0 × 1017cm-3 and 2 cm 2/Vs, respectively. For Mg doped Al0.7Ga0.3N, we have obtained a resistivity around 105 Ω cm at room temperature and confirmed p-type conduction at elevated temperatures (> 700 K) with a resistivity of about 40 Ω cm at 800 K. Based on the optimized material growth, 280 nm deep UV LED with forward voltage of 6.7 V, and output power of 0.35 mW has been achieved at 20 mA. To enhance light extraction efficiency, sapphire microlens array was monolithically integrated on flip-chip bonded deep UV LED substrates; a light extraction enhancement of 55% was achieved. To improve the transverse light extraction, photonic crystal structures were incorporated into the devices, and significant light extraction enhancement was achieved.

Original languageEnglish (US)
Title of host publicationQuantum Sensing and Nanophotonic Devices III
DOIs
StatePublished - 2006
Externally publishedYes
EventQuantum Sensing and Nanophotonic Devices III - San Jose, CA, United States
Duration: Jan 23 2006Jan 26 2006

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6127
ISSN (Print)0277-786X

Conference

ConferenceQuantum Sensing and Nanophotonic Devices III
CountryUnited States
CitySan Jose, CA
Period1/23/061/26/06

Keywords

  • DUV LEDs
  • III-nitride wide bandgap semiconductors
  • Light extraction efficiency
  • Light polarization
  • Microlens
  • n-AlGaN
  • Nano-photonics
  • p-AlGaN
  • Photonic crystals

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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