Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials
Visualitza/Obre
Cita com:
hdl:2117/171375
Tipus de documentArticle
Data publicació2019-08-15
Condicions d'accésAccés obert
Tots els drets reservats. Aquesta obra està protegida pels drets de propietat intel·lectual i
industrial corresponents. Sense perjudici de les exempcions legals existents, queda prohibida la seva
reproducció, distribució, comunicació pública o transformació sense l'autorització del titular dels drets
ProjecteONDAS DE LUZ EN CRISTALES, MEDIOS ESTRUCTURADOS Y METAMATERIALES (MINECO-FIS2015-65998-C2-1-P)
E10524 HIP-Lasers - High Power Composites of Edge Emitting Semiconductor Lasers (EC-EUROSTARS-E10524)
E10524 HIP-Lasers - High Power Composites of Edge Emitting Semiconductor Lasers (EC-EUROSTARS-E10524)
Abstract
We propose a novel physical mechanism based on periodicnon-Hermitian potentials to efficiently control the complexspatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), achieving a stableemission of maximum brightness. A radially dephased peri-odic refractive index and gain-loss modulations accumulatethe generated light from the entire active layer and concen-trate it around the structure axis to emit narrow, brightbeams. The effect is due to asymmetric inward radial cou-pling between transverse wave vectors for particular phasedifferences of the refractive index and gain-loss modulations.Light is confined into a central beam with large intensity,opening the path to design compact, bright, and efficientbroad-area light sources. We perform a comprehensive analy-sis to explore the maximum central intensity enhancement andconcentration regimes. This Letter reveals that the optimumschemes are those holding unidirectional inward coupling,but not fulfilling a perfect local PT-symmetry.
CitacióAhmed, W. [et al.]. Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials. "Optics letters", 15 Agost 2019, vol. 44, núm. 16, p. 3948-3951.
ISSN0146-9592
Versió de l'editorhttps://www.osapublishing.org/ol/abstract.cfm?uri=ol-44-16-3948
Fitxers | Descripció | Mida | Format | Visualitza |
---|---|---|---|---|
ol-postprint-1.pdf | 1,605Mb | Visualitza/Obre |