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Gold substrate-induced single-mode lasing of GaN nanowires

Xu, Huiwen and Wright, Jeremy B and Hurtado, Antonio and Li, Qiming and Luk, Ting-Shan and Figiel, Jeffrey J and Cross, Karen and Balakrishnan, Ganesh and Lester, Luke F and Brener, Igal and Wang, George T (2012) 'Gold substrate-induced single-mode lasing of GaN nanowires.' Applied Physics Letters, 101 (22). p. 221114. ISSN 0003-6951

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Abstract

We demonstrate a method for mode-selection by coupling a GaN nanowire laser to an underlying gold substrate. Multimode lasing of GaN nanowires is converted to single-mode behavior following placement onto a gold film. A mode-dependent loss is generated by the absorbing substrate to suppress multiple transverse-mode operation with a concomitant increase in lasing threshold of only ∼13%. This method provides greater flexibility in realizing practical single-mode nanowire lasers and offers insight into the design of metal-contacted nanoscale optoelectronics.

Item Type: Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science and Health > Computer Science and Electronic Engineering, School of
Depositing User: Jim Jamieson
Date Deposited: 06 Mar 2013 11:28
Last Modified: 06 Mar 2013 11:28
URI: http://repository.essex.ac.uk/id/eprint/5524

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