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Open AccessArticle

Miniaturized GaAs Nanowire Laser with a Metal Grating Reflector

by Wei Wei 1,2,*, Xin Yan 3 and Xia Zhang 3
1
School of Mechanical and Electric Engineering, Guangzhou University, Guangzhou 510006, China
2
Photonics Research Centre, Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
3
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 680; https://doi.org/10.3390/nano10040680
Received: 26 February 2020 / Revised: 29 March 2020 / Accepted: 30 March 2020 / Published: 4 April 2020
(This article belongs to the Special Issue Dynamics and Applications of Photon-Nanostructured Systems)
This work proposed a miniaturized nanowire laser with high end-facet reflection. The high end-facet reflection was realized by integrating an Ag grating between the nanowire and the substrate. Its propagation and reflection properties were calculated using the finite elements method. The simulation results show that the reflectivity can be as high as 77.6% for a nanowire diameter of 200 nm and a period of 20, which is nearly three times larger than that of the nanowire without a metal grating reflector. For an equal length of nanowire with/without the metal grating reflector, the corresponding threshold gain is approximately a quarter of that of the nanowire without the metal grating reflector. Owing to the high reflection, the length of the nanowire can be reduced to 0.9 μm for the period of 5, resulting in a genuine nanolaser, composed of nanowire, with three dimensions smaller than 1 μm (the diameter is 200 nm). The proposed nanowire laser with a lowered threshold and reduced dimensions would be of great significance in on-chip information systems and networks. View Full-Text
Keywords: nanowire; nanolaser; metal grating nanowire; nanolaser; metal grating
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MDPI and ACS Style

Wei, W.; Yan, X.; Zhang, X. Miniaturized GaAs Nanowire Laser with a Metal Grating Reflector. Nanomaterials 2020, 10, 680.

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