Stimulated emission and absorption of photons in magnetic point contacts

Yu. G. Naidyuk; O. P. Balkashin; V. V. Fisun; I. K. Yanson; A. M. Kadigrobov; R. I. Shekhter; Mats Jonson; V. Neu; M. Seifert; S. Andersson; V. Korenivski

doi:10.1088/1367-2630/14/9/093021

Stimulated emission and absorption of photons in magnetic point contacts

Yu. G. Naidyuk, O. P. Balkashin, V. V. Fisun, I. K. Yanson, A. M. Kadigrobov, R. I. Shekhter, Mats Jonson, V. Neu, M. Seifert, S. Andersson, V. Korenivski

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Abstract

Point contacts between high anisotropy ferromagnetic SmCo5 and normal metal Cu are used to achieve a strong spin-population inversion in the contact core. Subjected to microwave irradiation in resonance with the Zeeman splitting in Cu, the inverted spin population relaxes through stimulated spin-flip photon emission, detected as peaks in the point-contact resistance. Resonant spin-flip photon absorption is detected as resistance minima, corresponding to sourcing the photon field energy into the electrical circuit. These results demonstrate fundamental mechanisms that are potentially useful in designing metallic spin-based lasers.

Original language	English
Pages (from-to)	093021
Number of pages	10
Journal	New Journal of Physics
Volume	14
Issue number	9
DOIs	https://doi.org/10.1088/1367-2630/14/9/093021
Publication status	Published - 13 Sept 2012

Keywords

magnetic point contact
Stimulated emission

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title = "Stimulated emission and absorption of photons in magnetic point contacts",

abstract = "Point contacts between high anisotropy ferromagnetic SmCo5 and normal metal Cu are used to achieve a strong spin-population inversion in the contact core. Subjected to microwave irradiation in resonance with the Zeeman splitting in Cu, the inverted spin population relaxes through stimulated spin-flip photon emission, detected as peaks in the point-contact resistance. Resonant spin-flip photon absorption is detected as resistance minima, corresponding to sourcing the photon field energy into the electrical circuit. These results demonstrate fundamental mechanisms that are potentially useful in designing metallic spin-based lasers.",

keywords = "magnetic point contact, Stimulated emission",

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T1 - Stimulated emission and absorption of photons in magnetic point contacts

AU - Naidyuk, Yu. G.

AU - Balkashin, O. P.

AU - Fisun, V. V.

AU - Yanson, I. K.

AU - Kadigrobov, A. M.

AU - Shekhter, R. I.

AU - Jonson, Mats

AU - Neu, V.

AU - Seifert, M.

AU - Andersson, S.

AU - Korenivski, V.

N1 - Content from this work may be used under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

PY - 2012/9/13

Y1 - 2012/9/13

N2 - Point contacts between high anisotropy ferromagnetic SmCo5 and normal metal Cu are used to achieve a strong spin-population inversion in the contact core. Subjected to microwave irradiation in resonance with the Zeeman splitting in Cu, the inverted spin population relaxes through stimulated spin-flip photon emission, detected as peaks in the point-contact resistance. Resonant spin-flip photon absorption is detected as resistance minima, corresponding to sourcing the photon field energy into the electrical circuit. These results demonstrate fundamental mechanisms that are potentially useful in designing metallic spin-based lasers.

AB - Point contacts between high anisotropy ferromagnetic SmCo5 and normal metal Cu are used to achieve a strong spin-population inversion in the contact core. Subjected to microwave irradiation in resonance with the Zeeman splitting in Cu, the inverted spin population relaxes through stimulated spin-flip photon emission, detected as peaks in the point-contact resistance. Resonant spin-flip photon absorption is detected as resistance minima, corresponding to sourcing the photon field energy into the electrical circuit. These results demonstrate fundamental mechanisms that are potentially useful in designing metallic spin-based lasers.

KW - magnetic point contact

KW - Stimulated emission

U2 - 10.1088/1367-2630/14/9/093021

DO - 10.1088/1367-2630/14/9/093021

M3 - Article

SN - 1367-2630

VL - 14

SP - 093021

JO - New Journal of Physics

JF - New Journal of Physics

IS - 9

ER -

Stimulated emission and absorption of photons in magnetic point contacts

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