Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 4: Semiconductor Lasers

HL 4.8: Vortrag

Montag, 5. September 2022, 11:45–12:00, H33

Extraction of silver losses at cryogenic temperatures through optical characterization of Ag-coated plasmonic nanolasers — •Aris Koulas-Simos¹, Georgios Sinatkas^1,2, Taiping Zhang³, Jia-Lu Xu³, William E. Hayenga⁴, Qiang Kan⁵, Ruikang K. Zhang⁵, Mercedeh Khajavikhan^4,6, Cun-Zheng Ning^3,7, and Stephan Reitzenstein¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr. 36, 10623 Berlin, Germany — ²Institute of Integrated Photonics, RWTH Aachen University, Campus Blvd. 73, Aachen 20 52074, Germany — ³Department of Electronic Engineering, Tsinghua University, Beijing, 100084, China — ⁴CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, FL, USA — ⁵Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China — ⁶Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, USA — ⁷School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, 85287, Arizona, USA

We present a rigorous method for the extraction of silver losses at temperatures T from 10 K to 180 K at NIR wavelengths through T-dependent μPL studies on silver-coated InP-based nanolasers in conjunction with cavity simulations. The numerical algorithm maps the changes of the Q-factor, estimated at transparency, into the imaginary part of silver permittivity. The results are in good agreement with theoretical predictions estimating a drop of one order from room to cryogenic temperatures. This data is long missing from the literature and sets a pathway for the optimization of plasmonic nanolasers.