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Proceedings Paper

Giant lasing effect in magnetic point contacts and its detection by DC electrical measurements
Author(s): A. M. Kadigrobov; R. I. Shekhter; S. I. Kulinich; M. Jonson
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Paper Abstract

We propose a new principle for a compact solid-state laser in 1-100 THz regime based on a new mechanism for creating spin-flip processes in ferromagnetic conductors. On the base of this mechanism, a giant lasing effect is predicted. The optical gain is estimated to exceed the optical gain of conventional semiconductor lasers by 4 or 5 orders of magnitude. We propose to use a point contact between ferromagnetic metals in order to create an inverted spin-population of hot electrons in the contact region. While point contact spectroscopy is an established technology the use of magnetic point contacts as a photon source is a new and potentially very useful application. We show that the generated photons conveniently can be detected by measuring the current through the illuminated point contact.

Paper Details

Date Published: 21 February 2011
PDF: 15 pages
Proc. SPIE 7933, Physics and Simulation of Optoelectronic Devices XIX, 79331G (21 February 2011); doi: 10.1117/12.873888
Show Author Affiliations
A. M. Kadigrobov, Univ. of Gothenburg (Sweden)
Ruhr-Univ. Bochum (Germany)
R. I. Shekhter, Univ. of Gothenburg (Sweden)
S. I. Kulinich, B.I. Verkin Institute for Low Temperature Physics and Engineering (Ukraine)
M. Jonson, Univ. of Gothenburg (Sweden)
Heriot-Watt Univ. (United Kingdom)
Konkuk Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7933:
Physics and Simulation of Optoelectronic Devices XIX
Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa; Alexandre Freundlich, Editor(s)

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