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Symmetry Analysis of ZnSe(100) Surface in Air By Second Harmonic Generation

Xiangyang Song·Arnold Neumann·Rein Maripuu·Kai Siegbahn
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Abstract

Polarized and azimuthal dependencies of optical second harmonics generation (SHG) at the surface of noncentrosymmetric semiconductor crystals have been measured on polished surfaces of ZnSe(100), using a fundamental wavelength of 1.06$μm$. The SHG intensity patterns were analyzed for all four combination of p- and s-polarized incidence and output, considering both the bulk and surface optical nonlinearities in the electric dipole approximation. We found that the measurement using $S_{in}-S_{out}$ is particularly useful in determining the symmetry of the oxdized layer interface, which would lower the effective symmetry of the surface from $C_{4v}$ to $C_{2v}.$ We also have shown that the [011] and [0$\bar{1}$1] directions can be distinguished through the analysis of p-incident and p-output confugration.

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Xiangyang Song, Arnold Neumann, Rein Maripuu, Kai Siegbahn. 2002-03-09. Symmetry Analysis of ZnSe(100) Surface in Air By Second Harmonic Generation. https://arxiv.org/abs/physics/0203023

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