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Open AccessArticle

A Low-Threshold Miniaturized Plasmonic Nanowire Laser with High-Reflectivity Metal Mirrors

State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon 999077, Hong Kong, China
ITMO University, Kronverkskiy pr. 49, 197101 St. Petersburg, Russia
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(10), 1928;
Received: 4 September 2020 / Revised: 21 September 2020 / Accepted: 23 September 2020 / Published: 27 September 2020
(This article belongs to the Special Issue Advances in Photonic and Plasmonic Nanomaterials)
A reflectivity-enhanced hybrid plasmonic GaAs/AlGaAs core-shell nanowire laser is proposed and studied by 3D finite-difference time-domain simulations. The results demonstrate that by introducing thin metal mirrors at both ends, the end facet reflectivity of nanowire is increased by 30–140%, resulting in a much stronger optical feedback. Due to the enhanced interaction between the surface charge oscillation and light, the electric field intensity inside the dielectric gap layer increases, resulting in a much lower threshold gain. For a small diameter in the range of 100–150 nm, the threshold gain is significantly reduced to 60–80% that of nanowire without mirrors. Moreover, as the mode energy is mainly concentrated in the gap between the nanowire and metal substrate, the output power maintains >60% that of nanowire without mirrors in the diameter range of 100–150 nm. The low-threshold miniaturized plasmonic nanowire laser with simple processing technology is promising for low-consumption ultra-compact optoelectronic integrated circuits and on-chip communications. View Full-Text
Keywords: plasmonic nanowire laser; reflectivity-enhanced; nanolaser; GaAs plasmonic nanowire laser; reflectivity-enhanced; nanolaser; GaAs
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MDPI and ACS Style

Zheng, J.; Yan, X.; Wei, W.; Wu, C.; Sibirev, N.; Zhang, X.; Ren, X. A Low-Threshold Miniaturized Plasmonic Nanowire Laser with High-Reflectivity Metal Mirrors. Nanomaterials 2020, 10, 1928.

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