Abstract
The tunable optical response of elliptical nanohole arrays penetrating through metal–phase change material–metal (Au−Ge2Sb1Te4−Au) films is numerically investigated using the finite difference time domain method in the mid-infrared spectral region. The influence of amorphous and crystalline structural states of Ge2Sb1Te4 on the effective optical parameters of the structure is analyzed. Switching between these states provides a large wavelength shift of the structure’s effective optical parameters.
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