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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 2 — Feb. 1, 2009
  • pp: 328–336

Design of superperiodic photonic-crystal light-emitting plates with highly directive luminance characteristics

Chan M. Lim and G. Hugh Song  »View Author Affiliations


JOSA B, Vol. 26, Issue 2, pp. 328-336 (2009)
http://dx.doi.org/10.1364/JOSAB.26.000328


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Abstract

A “superperiodic” photonic-crystal (PhC) light-emitting diode (LED) design exhibiting high-luminance patterns is proposed for applications that require highly directive vertical light extraction. The superperiodic design employs a periodic arrangement of defective missing holes on an otherwise perfect periodic pattern of holes for the basic two-dimensional PhC structure. Avoiding the fragile semiconductor membrane structure that is popular in current PhC laser designs, the design utilizes a thick epitaxy structure with electromagnetic density-of-mode singularity. This singularity is created by the defect mode in a three-dimensional frequency versus wave vector relation within the band matched with the gain spectrum of the LED that is placed on top of the base reflector plate material. The superperiodic structure of this design is shown to provide an effective means for sharpening the vertical beam in the far field, based on discrete-Fourier transformation theory. Subsequent simulations based on the finite-difference time-domain analysis verify the effectiveness of the design principle on GaN epitaxy structures with various bottom layers.

© 2009 Optical Society of America

OCIS Codes
(230.3670) Optical devices : Light-emitting diodes
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optical Devices

History
Original Manuscript: July 26, 2008
Revised Manuscript: October 9, 2008
Manuscript Accepted: October 13, 2008
Published: January 28, 2009

Citation
Chan M. Lim and G. Hugh Song, "Design of superperiodic photonic-crystal light-emitting plates with highly directive luminance characteristics," J. Opt. Soc. Am. B 26, 328-336 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-2-328


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