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Subwavelength terahertz spin-flip laser based on a magnetic point-contact array
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2011 (English)In: Optics Letters, ISSN 0146-9592, E-ISSN 1539-4794, Vol. 36, no 12, 2381-2383 p.Article in journal (Refereed) Published
Abstract [en]

We present a theoretical design for a single-mode, truly subwavelength terahertz disk laser based on a nanocomposite gain medium comprising an array of normal-metal/ferromagnetic (FM) point contacts embedded in a thin dielectric layer. Stimulated emission of light occurs due to spin-flip relaxation of spin-polarized electrons injected from the FM side of the contacts. Ultrahigh electrical current densities in the contacts and a dielectric material with a large refractive index, neither condition being achievable in conventional semiconductor media, enables the thresholds of lasing to be overcome for the lowest-order modes of the disk, making single-mode operation possible.

Place, publisher, year, edition, pages
2011. Vol. 36, no 12, 2381-2383 p.
Keyword [en]
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Atom and Molecular Physics and Optics
URN: urn:nbn:se:kth:diva-35605DOI: 10.1364/OL.36.002381ISI: 000291722100070ScopusID: 2-s2.0-79959428131OAI: diva2:429719
EU, FP7, Seventh Framework Programme, 225955 STELESwedish Research Council
QC 20110705Available from: 2011-07-05 Created: 2011-07-04 Last updated: 2011-07-05Bibliographically approved

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Korenivski, Vladislav
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Nanostructure Physics
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