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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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. © 2011 SPIE.

Original languageEnglish
Title of host publicationPhysics and Simulation of Optoelectronic Devices XIX
Publication statusPublished - 2011
EventQuantum Sensing and Nanophotonic Devices VIII - San Francisco, CA, United States
Duration: 23 Jan 201127 Jan 2011


ConferenceQuantum Sensing and Nanophotonic Devices VIII
Country/TerritoryUnited States
CitySan Francisco, CA


  • inverse population
  • laser
  • point contact
  • spin-polarized injection


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