Sub-micron inGaN ring structures for high-efficiency LEDs

H.W. Choi, P.R. Edwards, C. Liu, C.W. Jeon, R.W. Martin, I.M. Watson, M.D. Dawson, P. Tripathy, S.J. Chua

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

A novel technique based on the Fresnel diffraction effect for the fabrication of sub-micron ring structures in InGaN/GaN multi-quantum well structures has been demonstrated. The ring structures have an external diameter of 1.5 m and a wall width of 500 nm. A 1 cm-1 Raman shift has been measured, signifying substantial strain relaxation from the fabricated structure. The 5 nm blue shift observed in the cathodoluminescence spectra can be attributed to band-filling and/or screening of the piezoelectric field. A light emitting diode based on this geometry has been demonstrated.
LanguageEnglish
Pages202-205
Number of pages3
JournalPhysica Status Solidi C
Volume1
Issue number2
DOIs
Publication statusPublished - 2004

Fingerprint

ring structures
light emitting diodes
Fresnel diffraction
cathodoluminescence
blue shift
screening
quantum wells
fabrication
shift
geometry

Keywords

  • light-emitting-diodes
  • gan
  • sub-micron ring structures
  • cathodoluminescence

Cite this

Choi, H.W. ; Edwards, P.R. ; Liu, C. ; Jeon, C.W. ; Martin, R.W. ; Watson, I.M. ; Dawson, M.D. ; Tripathy, P. ; Chua, S.J. / Sub-micron inGaN ring structures for high-efficiency LEDs. In: Physica Status Solidi C. 2004 ; Vol. 1, No. 2. pp. 202-205.
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Sub-micron inGaN ring structures for high-efficiency LEDs. / Choi, H.W.; Edwards, P.R.; Liu, C.; Jeon, C.W.; Martin, R.W.; Watson, I.M.; Dawson, M.D.; Tripathy, P.; Chua, S.J.

In: Physica Status Solidi C, Vol. 1, No. 2, 2004, p. 202-205.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Sub-micron inGaN ring structures for high-efficiency LEDs

AU - Choi, H.W.

AU - Edwards, P.R.

AU - Liu, C.

AU - Jeon, C.W.

AU - Martin, R.W.

AU - Watson, I.M.

AU - Dawson, M.D.

AU - Tripathy, P.

AU - Chua, S.J.

PY - 2004

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KW - light-emitting-diodes

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KW - cathodoluminescence

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