Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials
Type
ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionApplied Mathematics and Computational Science Program
KAUST Grant Number
BAS/1/1626-01-01OSR-2016-CRG5-2950
Date
2019-08-06Online Publication Date
2019-08-06Print Publication Date
2019-08-15Permanent link to this record
http://hdl.handle.net/10754/656755
Metadata
Show full item recordAbstract
We propose a novel physical mechanism based on periodic non-Hermitian potentials to efficiently control the complex spatial dynamics of broad-area lasers, particularly in vertical-cavity surface-emitting lasers (VCSELs), achieving a stable emission of maximum brightness. A radially dephased periodic refractive index and gain-loss modulations accumulate the generated light from the entire active layer and concentrate it around the structure axis to emit narrow, bright beams. The effect is due to asymmetric inward radial coupling between transverse wave vectors for particular phase differences 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 efficient broad-area light sources. We perform a comprehensive analysis to explore the maximum central intensity enhancement and concentration regimes. This Letter reveals that the optimum schemes are those holding unidirectional inward coupling, but not fulfilling a perfect local PT-symmetry.Citation
Ahmed, W. W., Herrero, R., Botey, M., Wu, Y., & Staliunas, K. (2019). Regularization of vertical-cavity surface-emitting laser emission by periodic non-Hermitian potentials. Optics Letters, 44(16), 3948. doi:10.1364/ol.44.003948Sponsors
King Abdullah University of Science and Technology (KAUST) (BAS/1/1626-01-01, OSR-2016-CRG5-2950); Spanish Ministerio de Economía y Competitividad (MINECO) (FIS2015-65998-C2-1-P); European Union Horizon 2020 Framework Programme (H2020) EUROSTARS (E10524 HIP-Laser).Journal
Optics LettersAdditional Links
https://www.osapublishing.org/abstract.cfm?URI=ol-44-16-3948ae974a485f413a2113503eed53cd6c53
10.1364/OL.44.003948