Universal lasing condition

Abstract Usually, the cavity is considered an intrinsic part of laser design to enable coherent emission. For different types of cavities, it is assumed that the light coherence is achieved by different ways. We show that regardless of the type of cavity, the lasing condition is universal and is det...

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Autores principales:	Ilya V. Doronin, Alexander A. Zyablovsky, Evgeny S. Andrianov, Alexander A. Pukhov, Yurii E. Lozovik, Alexey P. Vinogradov
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/2599645b17f940d9a73c2faf99ff8b02
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spelling	oai:doaj.org-article:2599645b17f940d9a73c2faf99ff8b022021-12-02T10:54:23ZUniversal lasing condition10.1038/s41598-021-83701-32045-2322https://doaj.org/article/2599645b17f940d9a73c2faf99ff8b022021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83701-3https://doaj.org/toc/2045-2322Abstract Usually, the cavity is considered an intrinsic part of laser design to enable coherent emission. For different types of cavities, it is assumed that the light coherence is achieved by different ways. We show that regardless of the type of cavity, the lasing condition is universal and is determined by the ratio of the width of the atomic spectrum to the product of the number of atoms and the spontaneous radiation rate in the laser structure. We demonstrate that cavity does not play a crucial role in lasing since it merely decreases the threshold by increasing the photon emission rate thanks to the Purcell effect. A threshold reduction can be achieved in a cavity-free structure by tuning the local density of states of the electromagnetic field. This paves the way for the design of laser devices based on cavity-free systems.Ilya V. DoroninAlexander A. ZyablovskyEvgeny S. AndrianovAlexander A. PukhovYurii E. LozovikAlexey P. VinogradovNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ilya V. Doronin Alexander A. Zyablovsky Evgeny S. Andrianov Alexander A. Pukhov Yurii E. Lozovik Alexey P. Vinogradov Universal lasing condition
description	Abstract Usually, the cavity is considered an intrinsic part of laser design to enable coherent emission. For different types of cavities, it is assumed that the light coherence is achieved by different ways. We show that regardless of the type of cavity, the lasing condition is universal and is determined by the ratio of the width of the atomic spectrum to the product of the number of atoms and the spontaneous radiation rate in the laser structure. We demonstrate that cavity does not play a crucial role in lasing since it merely decreases the threshold by increasing the photon emission rate thanks to the Purcell effect. A threshold reduction can be achieved in a cavity-free structure by tuning the local density of states of the electromagnetic field. This paves the way for the design of laser devices based on cavity-free systems.
format	article
author	Ilya V. Doronin Alexander A. Zyablovsky Evgeny S. Andrianov Alexander A. Pukhov Yurii E. Lozovik Alexey P. Vinogradov
author_facet	Ilya V. Doronin Alexander A. Zyablovsky Evgeny S. Andrianov Alexander A. Pukhov Yurii E. Lozovik Alexey P. Vinogradov
author_sort	Ilya V. Doronin
title	Universal lasing condition
title_short	Universal lasing condition
title_full	Universal lasing condition
title_fullStr	Universal lasing condition
title_full_unstemmed	Universal lasing condition
title_sort	universal lasing condition
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/2599645b17f940d9a73c2faf99ff8b02
work_keys_str_mv	AT ilyavdoronin universallasingcondition AT alexanderazyablovsky universallasingcondition AT evgenysandrianov universallasingcondition AT alexanderapukhov universallasingcondition AT yuriielozovik universallasingcondition AT alexeypvinogradov universallasingcondition
_version_	1718396458287235072

Universal lasing condition

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