Full band structure calculation of the linear electro-optic susceptibility
- 2 May 1994
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 64 (18) , 2421-2423
- https://doi.org/10.1063/1.111587
Abstract
We have derived a complete microscopic quantum mechanical expression for the frequency-dependent (clamped lattice) linear electro-optic (EO) susceptibility, χ⇊(2) (−ω;ω,0), of crystalline solids in the independent particle approximation. The expression is free of the unphysical divergent terms at zero frequency which often plague such calculations. Using these expressions and utilizing a linear combination of Gaussian orbitals technique in conjunction with the Xα method we have carried out a full band structure calculation of the frequency-dependent linear EO susceptibility of GaAs. Our calculated results are in good agreement with the available experimental measurements.Keywords
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