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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 9 — May. 1, 2013
  • pp: 1491–1493

Air-ring microstructure arrays for enhanced light extraction from a face-up light-emitting diode

Hyun Kyu Kim, Young Jae Park, Ji Hye Kang, Nam Han, Min Han, Beo Deul Ryu, Kang Bok Ko, Jong Han Yang, Young Taek Kim, S. Chandramohan, Hyun Jeong, Mun Seok Jeong, and Chang-Hee Hong  »View Author Affiliations


Optics Letters, Vol. 38, Issue 9, pp. 1491-1493 (2013)
http://dx.doi.org/10.1364/OL.38.001491


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Abstract

In this Letter, a light-emitting diode (LED) with prism-shaped-air-ring microstructures (PSAMs) formed on flat sapphire substrate is demonstrated as an alternative design to face-up LEDs on patterned sapphire substrate (PSS) for enhanced light extraction efficiency. In this LED design, the emitted photons can be deflected to the top of the chip for its effective extraction, contrary to the PSS-LED wherein photons are guided to sapphire and get absorbed by packaging materials. The PSAM-LED showed an enhancement in the radiometric power as high as 10% with a low far-field angle of 129° over that of a PSS-LED under an injection current of 20 mA.

© 2013 Optical Society of America

OCIS Codes
(130.0250) Integrated optics : Optoelectronics
(230.0230) Optical devices : Optical devices
(230.3670) Optical devices : Light-emitting diodes
(260.6970) Physical optics : Total internal reflection
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:
Optical Devices

History
Original Manuscript: March 1, 2013
Revised Manuscript: March 26, 2013
Manuscript Accepted: March 27, 2013
Published: April 26, 2013

Citation
Hyun Kyu Kim, Young Jae Park, Ji Hye Kang, Nam Han, Min Han, Beo Deul Ryu, Kang Bok Ko, Jong Han Yang, Young Taek Kim, S. Chandramohan, Hyun Jeong, Mun Seok Jeong, and Chang-Hee Hong, "Air-ring microstructure arrays for enhanced light extraction from a face-up light-emitting diode," Opt. Lett. 38, 1491-1493 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-9-1491


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