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Journal of Nanophotonics • Open Access

Optical gain in surface plasmon nanocavity oscillators
Author(s): Chuan Sheng Liu; Vipin K. Tripathi

Paper Abstract

An analytical model of optical gain is developed for three types of surface plasmon nano-oscillators: (i) a metal film with a gain medium nanostrip, (ii) a metal film, with nanohole, deposited on a layer of gain medium, and (iii) a nanoparticle coated with a gain medium. The operating frequency of the plasmon laser is close to surface plasmon resonance, hence the cavity size is strongly reduced. The evanescent field of the oscillator stimulates the electron–hole recombination in the gain medium, amplifying the cavity field. With electron–hole occupation probabilities in the relevant energy states in the gain medium just exceeding 50% each, the growth rate exceeds 1013  s1. The excited cavity mode acts as an oscillatory dipole to emit optical radiation.

Paper Details

Date Published: 14 March 2016
PDF: 11 pages
J. Nanophoton. 10(1) 016015 doi: 10.1117/1.JNP.10.016015
Published in: Journal of Nanophotonics Volume 10, Issue 1
Show Author Affiliations
Chuan Sheng Liu, Univ. of Macau (China)
Vipin K. Tripathi, Univ. of Macau (China)

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