Giant lasing effect in magnetic point contacts and its detection by DC electrical measurements

A. M. Kadigrobov; R. I. Shekhter; S. I. Kulinich; M. Jonson

doi:10.1117/12.873888

21 February 2011 Giant lasing effect in magnetic point contacts and its detection by DC electrical measurements

A. M. Kadigrobov, R. I. Shekhter, S. I. Kulinich, M. Jonson

Proceedings Volume 7933, Physics and Simulation of Optoelectronic Devices XIX; 79331G (2011) https://doi.org/10.1117/12.873888
Event: SPIE OPTO, 2011, San Francisco, California, United States

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.

Citation Download Citation

A. M. Kadigrobov, R. I. Shekhter, S. I. Kulinich, and M. Jonson "Giant lasing effect in magnetic point contacts and its detection by DC electrical measurements", Proc. SPIE 7933, Physics and Simulation of Optoelectronic Devices XIX, 79331G (21 February 2011); https://doi.org/10.1117/12.873888

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