Infrared Optical Absorptions in Corrugated Lateral Surface Superlattices |
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| Authors: | SUN Hong HUANG Jinmin YU Kinwah |
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| Institution: | 1. Deartment of Physics and Institute of Condensed Matter Physics, Shanghai Jiao Tong University, Shanghai 200030, China;
2. Shanghai Vocational College of Mechanical and Electrical Engineering, Branch Ⅱ, Shanghai 200082, China;
3. Department of Physics, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China |
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| Abstract: | The optical properties are investigated numerically in infrared (IR) regions for GaAs/AIAs corrugated lateral surface superlattices (CLSSLs) with short lateral periods. The calculations are carried out for refractive indexes and optical absorption coefficients with and without inclusion of electron interactions in an attempt to study the effects of intersubbahd plasmons on the IR optical properties of CLSSLs. As lateral periods of CLSSLs increase from 10 nm to 30 nm, their IR optical properties change from the behavior dominated by single electron transitions between conduction subbands to those dominated by intersubband plasmon excitations. Strong and sharp peaks in the optical absorption coefficients, large variations of the refractive indexes and strong anisotropic optical properties of CLSSLs are predicted in IR regions. |
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| Keywords: | corrugated lateral surface superlattice infrared optical absorption |
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