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Title: Random lasing in a nanocomposite medium

Abstract

The characteristics of a random laser based on a nanocomposite medium consisting of a transparent dielectric and scattering doped nanocrystals are calculated. It is proposed to use ytterbium laser media with a high concentration of active ions as nanocrystals and to use gases, liquids, or solid dielectrics with a refractive index lower than that of nanocrystals as dielectric matrices for nanocrystals. Based on the concept of nonresonant distributed feedback due to the Rayleigh scattering, an expression is obtained for the minimum length of a nanocomposite laser medium at which the random lasing threshold is overcome. Expressions are found for the critical (maximum) and the optimal size of nanocrystals, as well as for the optimal relative refractive index of nanocomposites that corresponds not only to the maximum gain but also to the minimum of the medium threshold length at the optimal size of nanocrystals. It is shown that the optimal relative refractive index of a nanocomposite increases with increasing pump level, but is independent of the other nanocomposite parameters. (nanocomposites)

Authors:
;  [1]
  1. A M Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)
Publication Date:
OSTI Identifier:
22113740
Resource Type:
Journal Article
Journal Name:
Quantum Electronics (Woodbury, N.Y.)
Additional Journal Information:
Journal Volume: 43; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1063-7818
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 77 NANOSCIENCE AND NANOTECHNOLOGY; COMPOSITE MATERIALS; CONCENTRATION RATIO; CRYSTALS; DIELECTRIC MATERIALS; DOPED MATERIALS; IONS; LASERS; MATRIX MATERIALS; NANOSTRUCTURES; RANDOMNESS; RAYLEIGH SCATTERING; REFRACTIVE INDEX; YTTERBIUM

Citation Formats

Smetanin, Sergei N, and Basiev, Tasoltan T. Random lasing in a nanocomposite medium. United States: N. p., 2013. Web. doi:10.1070/QE2013V043N01ABEH014944.
Smetanin, Sergei N, & Basiev, Tasoltan T. Random lasing in a nanocomposite medium. United States. https://doi.org/10.1070/QE2013V043N01ABEH014944
Smetanin, Sergei N, and Basiev, Tasoltan T. 2013. "Random lasing in a nanocomposite medium". United States. https://doi.org/10.1070/QE2013V043N01ABEH014944.
@article{osti_22113740,
title = {Random lasing in a nanocomposite medium},
author = {Smetanin, Sergei N and Basiev, Tasoltan T},
abstractNote = {The characteristics of a random laser based on a nanocomposite medium consisting of a transparent dielectric and scattering doped nanocrystals are calculated. It is proposed to use ytterbium laser media with a high concentration of active ions as nanocrystals and to use gases, liquids, or solid dielectrics with a refractive index lower than that of nanocrystals as dielectric matrices for nanocrystals. Based on the concept of nonresonant distributed feedback due to the Rayleigh scattering, an expression is obtained for the minimum length of a nanocomposite laser medium at which the random lasing threshold is overcome. Expressions are found for the critical (maximum) and the optimal size of nanocrystals, as well as for the optimal relative refractive index of nanocomposites that corresponds not only to the maximum gain but also to the minimum of the medium threshold length at the optimal size of nanocrystals. It is shown that the optimal relative refractive index of a nanocomposite increases with increasing pump level, but is independent of the other nanocomposite parameters. (nanocomposites)},
doi = {10.1070/QE2013V043N01ABEH014944},
url = {https://www.osti.gov/biblio/22113740}, journal = {Quantum Electronics (Woodbury, N.Y.)},
issn = {1063-7818},
number = 1,
volume = 43,
place = {United States},
year = {Thu Jan 31 00:00:00 EST 2013},
month = {Thu Jan 31 00:00:00 EST 2013}
}