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Appl. Sci. 2018, 8(11), 2186; https://doi.org/10.3390/app8112186

Low Threshold Plasmonic Nanolaser Based on Graphene

Optical Information Technology Lab, School of Optoelectronics and Energy, Wuhan Institute of Technology, Wuhan 430205, China
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Received: 13 October 2018 / Revised: 2 November 2018 / Accepted: 2 November 2018 / Published: 8 November 2018
(This article belongs to the Special Issue Ultrafast Laser Pulses)
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Abstract

A hybrid plasmonic nanolaser based on nanowire/air slot/semicircular graphene and metal wire structure was designed. In this structure, the waveguides in the nanowires and the graphene-metal interface are coupled to form a hybrid plasma mode, which effectively reduces the metal loss. The mode and strong coupling of the laser are analyzed by using the finite-element method. Its electric field distribution, propagation loss, normalized mode area, quality factor, and lasing threshold are studied with the different geometric model. Simulation results reveal that the performance of the laser using this structure can be optimized by adjusting the model parameters. Under the optimal parameters, the effective propagation loss is only 0.0096, and the lasing threshold can be as low as 0.14 μm−1. This structure can achieve deep sub-wavelength confinement and low-loss transmission, and provides technical support for the miniaturization and integration of nano-devices. View Full-Text
Keywords: hybrid plasma; nanolaser; finite element; threshold; mode properties hybrid plasma; nanolaser; finite element; threshold; mode properties
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Xu, L.; Li, F.; Liu, S.; Yao, F.; Liu, Y. Low Threshold Plasmonic Nanolaser Based on Graphene. Appl. Sci. 2018, 8, 2186.

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