LINEAR AND NONLINEAR INTERSUBBAND REFRACTIVE INDEX CHANGES IN WURTZITEAlGaN/GaNDOUBLE QUANTUM WELLS: EFFECTS OF PIEZOELECTRICITY AND SPONTANEOUS POLARIZATION

L. Zhang ()
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L. Zhang: Department of Mechanism and Electronics, Panyu Polytechnic, Panyu, 511483, P. R. China

Surface Review and Letters (SRL), 2009, vol. 16, issue 01, 11-17

Abstract: Based on the density-matrix approach and iterative treatment, a detailed procedure for the calculation of the linear and nonlinear intersubband refractive index changes (RICs) in wurtzite GaN-based coupling quantum wells (CQWs) is given. The simple analytical formulas for electronic eigenstates and the linear and third-order nonlinear RICs in the systems are also deduced. Numerical result on a typicalAlGaN/GaNCQW shows that the linear and nonlinear RICs sensitively depend on the structural parameters of the CQW system as well as the doped fraction of nitride semicondutor.

Keywords: Double quantum wells; piezoelectricity and spontaneous polarization effects; refractive index; wurtzite nitride semiconductor (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012226

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