Here, we analytically study optical activity of chiral semiconductor gammadions whose chirality arises from the nonuniformity of their thickness. We show that such gammadions distinguish between the two circular polarizations upon the absorption of light, unlike two-dimensional semiconductor nanostructures with planar chirality. Chiral semiconductor gammadions of inverse conical shape are found to exhibit the highest dissymmetry of optical response among the nanostructures of the same size. The results of our theoretical study can be used in future applications of semiconductor gammadions in biomedicine and optoelectronics.
Nikita V. Tepliakov, Ilia A. Vovk, Anvar S. Baimuratov, Mikhail Yu. Leonov, Alexander V. Baranov, Anatoly V. Fedorov, and Ivan D. Rukhlenko, "Optical activity of chiral semiconductor gammadions," Proc. SPIE 11026, Nonlinear Optics and Applications XI, 110260B (Presented at SPIE Optics + Optoelectronics: April 01, 2019; Published: 30 April 2019); https://doi.org/10.1117/12.2520794.
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