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Extraction of silver losses at cryogenic temperatures through the optical characterization of silver-coated plasmonic nanolasers
Citation key 2022_06_KoulasSimos
Author Aris Koulas-Simos and Georgios Sinatkas and Taiping Zhang and Jia-Lu Xu and William E. Hayenga and Qiang Kan and Ruikang Zhang and Mercedeh Khajavikhan and Cun-Zheng Ning and Stephan Reitzenstein
Pages 21664–21678
Year 2022
DOI 10.1364/OE.458513
Journal Opt. Express
Volume 30
Number 12
Month Jun
Publisher Optica Publishing Group
Abstract We report on the extraction of silver losses in the range 10 K-180 K by performing temperature-dependent micro-photoluminescence measurements in conjunction with numerical simulations on silver-coated nanolasers around near-infrared telecommunication wavelengths. By mapping changes in the quality factor of nanolasers into silver-loss variations, the imaginary part of silver permittivity is extracted at cryogenic temperatures. The latter is estimated to reach values an order of magnitude lower than room-temperature values. Temperature-dependent values for the thermo-optic coefficient of III-V semiconductors occupying the cavity are estimated as well. This data is missing from the literature and is crucial for precise device modeling. Our results can be useful for device designing, the theoretical validation of experimental observations as well as the evaluation of thermal effects in silver-coated nanophotonic structures.
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