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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. 11 — Nov. 1, 2009
  • pp: 2181–2184

Bandgap investigations and the effect of the In and Al concentration on the optical properties of In x Al 1 x N

Muhammad Maqbool, Bin Amin, and Iftikhar Ahmad  »View Author Affiliations


JOSA B, Vol. 26, Issue 11, pp. 2181-2184 (2009)
http://dx.doi.org/10.1364/JOSAB.26.002181


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Abstract

Optical properties of In x Al 1 x N are calculated as a function of the concentration of indium and aluminum. Aluminum is partially replaced by indium in an AlN sample, and optical properties of the resulting materials are studied. The fractional concentration of indium is increased gradually from x = 0 to x = 1 in steps of 0.25. The bandgap decreases with increasing indium concentration, ending up with a narrow gap of 0.9 eV for pure InN and a wide gap of 5.4 eV for pure AlN. Frequency-dependent reflectivity, absorption coefficient, and optical conductivity of In x Al 1 x N are calculated and found to be the constituent’s concentration dependent. The maximum value of reflectivity, absorption coefficient, and optical conductivity shifts from higher frequency into the lower frequency region as the material goes from pure AlN to pure InN.

© 2009 Optical Society of America

OCIS Codes
(230.1150) Optical devices : All-optical devices
(310.3840) Thin films : Materials and process characterization
(350.4600) Other areas of optics : Optical engineering
(230.5298) Optical devices : Photonic crystals

ToC Category:
Optics at Surfaces

History
Original Manuscript: June 5, 2009
Revised Manuscript: August 13, 2009
Manuscript Accepted: September 23, 2009
Published: October 27, 2009

Citation
Muhammad Maqbool, Bin Amin, and Iftikhar Ahmad, "Bandgap investigations and the effect of the In and Al concentration on the optical properties of InxAl1−xN," J. Opt. Soc. Am. B 26, 2181-2184 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-11-2181

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