7 March 2014 ZnO as a tunable metal: New surface plasmon polaritons at telecommunication wavelengths
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Abstract
Ga doping of ZnO allows for generation of free electrons up to concentrations of about 1021 cm-3 without significant deterioration of the crystal structure. In this way, a metallic dielectric function is formed with a negative-to-positive crossover of the real part tunable from mid infrared up to telecommunication wavelengths. The losses are at least one order of magnitude lower than for traditional metals. We demonstrate surface plasmon polaritons with dispersion relations that can be engineered in a unique way by utilizing epitaxial multi-layer structures of different doping level.
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Sascha Kalusniak, Sascha Kalusniak, Sergey Sadofev, Sergey Sadofev, Fritz Henneberger, Fritz Henneberger, } "ZnO as a tunable metal: New surface plasmon polaritons at telecommunication wavelengths", Proc. SPIE 8980, Physics and Simulation of Optoelectronic Devices XXII, 89800N (7 March 2014); doi: 10.1117/12.2042235; https://doi.org/10.1117/12.2042235
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