Yu. V. Gulyaev, P. E. Zil'berman, I. V. Malikov, G. M. Mikhailov, A. I. Panas, S. G. Chigarev, E. M. Epshtein, “Spin-injection terahertz radiation in magnetic junctions”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2011, Volume 93, Issue 5,Pages <nobr>289

This article is cited in 36 papers

ATOMS, SPECTRA, RADIATIONS

Spin-injection terahertz radiation in magnetic junctions

Yu. V. Gulyaev^a, P. E. Zil'berman^a, I. V. Malikov^b, G. M. Mikhailov^b, A. I. Panas^a, S. G. Chigarev^a, E. M. Epshtein^a

^a Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences
^b Institute of Microelectronics Technology and High Purity Materials, Russian Academy of Sciences

Abstract: Electromagnetic radiation of 1–10 THz range is observed at room temperature in a structure with a point contact between a ferromagnetic rod and a thin ferromagnetic film under electric current of high enough density. The radiation is due to nonequilibrium spin injection between the components of the structure. By estimates, the injection can lead to inverted population of the spin subbands. The radiation power exceeds by orders of magnitude the thermal background (with the Joule heating taken into account) and follows the current without inertia.

Received: 19.01.2011
Revised: 31.01.2011