Spin-Injection Stimulated Radiation of Terahertz Waves in Magnetic Junctions (“Twaser” Action)

Abstract:

We report on apparently the first observation of terahertz stimulated radiation in magnetic junctions due to nonequilibrium spins injected by current at room temperatures. The contact between ferromagnetic layers is investigated and so the contact between ferromagnetic and antiferromagnetic layers. The current flowing in the structure creates an inversed population of spin energy levels. After a placing of such a structure in a resonator positive feedback and stimulated emission appears. When current is growing, we observe the relatively narrow (in frequencies) peak - analogous to laser generation but at terahertz frequencies. For the higher currents we observe the picture of electromagnetic turbulence.

• Periodical: Solid State Phenomena (Volumes 233-234)
• Pages: 399-402
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.233-234.399
• Online since: July 2015
• Authors: A.V. Chernych, Sergey G. Chigarev, Yu.V. Gulyaev, G.M. Mikhailov, A.I. Panas, Evgeniy Alexandrovich Vilkov*, P.E. Zilberman
• Keywords: Magnetic Junctions

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DOI: 10.1134/s0021364011050055

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