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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 5 — May. 1, 2008
  • pp: 810–817

Three-dimensional numerical modeling of emission from InSb light-emitting diodes with patterned surfaces

I. J. Buss, G. R. Nash, J. G. Rarity, and M. J. Cryan  »View Author Affiliations


JOSA B, Vol. 25, Issue 5, pp. 810-817 (2008)
http://dx.doi.org/10.1364/JOSAB.25.000810


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Abstract

Full 3D numerical modeling is undertaken on light-emitting diode structures with patterned surfaces represented by regular, pseudorandomly disordered, and uniformly distributed random arrays of square holes to investigate both grating and random scattering phenomena. Unlike typical roughened surface LEDs, no recycling mirror is present below the source, enabling straightforward implementation in existing device designs. The period or feature width of the arrays is varied and the output emission intensity calculated. A maximum enhancement factor of 2 is seen for both a disordered pattern with an array period of 1.7 μ m and pattern depth of 0.4 μ m and a particular random pattern with a feature width of 0.85 μ m and depth of 0.4 μ m . The enhancement is believed to be due to mitigation of both total internal reflection and Fresnel reflection phenomena at the semiconductor–air interface.

© 2008 Optical Society of America

OCIS Codes
(240.5770) Optics at surfaces : Roughness
(250.3140) Optoelectronics : Integrated optoelectronic circuits

ToC Category:
Optics at Surfaces

History
Original Manuscript: November 26, 2007
Manuscript Accepted: February 7, 2008
Published: April 28, 2008

Citation
I. J. Buss, G. R. Nash, J. G. Rarity, and M. J. Cryan, "Three-dimensional numerical modeling of emission from InSb light-emitting diodes with patterned surfaces," J. Opt. Soc. Am. B 25, 810-817 (2008)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-25-5-810


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