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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 13 — Jun. 23, 2008
  • pp: 9918–9926

Individually-addressable flip-chip AlInGaN micropixelated light emitting diode arrays with high continuous and nanosecond output power

H. X. Zhang, D. Massoubre, J. McKendry, Z. Gong, B. Guilhabert, C. Griffin, E. Gu, P. E. Jessop, J. M. Girkin, and M. D. Dawson  »View Author Affiliations


Optics Express, Vol. 16, Issue 13, pp. 9918-9926 (2008)
http://dx.doi.org/10.1364/OE.16.009918


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Abstract

Micropixelated blue (470nm) and ultraviolet (370nm) AlInGaN light emitting diode (�??micro-LED�??) arrays have been fabricated in flip-chip format with different pixel diameters (72μm and 30μm at, respectively, 100 and 278 pixels/mm2). Each micro-LED pixel can be individually-addressed and the devices possess a specially designed n-common contact incorporated to ensure uniform current injection and consequently uniform light emission across the array. The flip-chip micro-LEDs show, per pixel, high continuous output intensity of up to 0.55μW/μm2 (55W/cm2) at an injection current density of 10kA/cm2 and can sustain continuous injection current densities of up to 12kA/cm2 before breakdown. We also demonstrate that nanosecond pulsed output operation of these devices with per pixel onaxis average peak intensity up to 2.9μW/μm2 (corresponding to energy of 45pJ per 22ns optical pulse) can be achieved. We investigate the pertinent performance characteristics of these arrays for micro-projection applications, including the prospect of integrated optical pumping of organic semiconductor lasers.

© 2008 Optical Society of America

OCIS Codes
(180.1790) Microscopy : Confocal microscopy
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.3670) Optical devices : Light-emitting diodes
(230.3990) Optical devices : Micro-optical devices
(230.6080) Optical devices : Sources

ToC Category:
Microscopy

History
Original Manuscript: March 19, 2008
Revised Manuscript: May 9, 2008
Manuscript Accepted: May 15, 2008
Published: June 20, 2008

Virtual Issues
Vol. 3, Iss. 7 Virtual Journal for Biomedical Optics

Citation
H. X. Zhang, D. Massoubre, J. McKendry, Z. Gong, B. Guilhabert, C. Griffin, E. Gu, P. E. Jessop, J. M. Girkin, and M. D. Dawson, "Individually-addressable flip-chip AlInGaN micropixelated light emitting diode arrays with high continuous and nanosecond output power," Opt. Express 16, 9918-9926 (2008)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-13-9918


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