Low-Threshold Lasing and Coherent Perfect Absorption in Generalized \nPT\n-Symmetric Optical Structures
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ArticleKAUST Department
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) DivisionElectrical Engineering Program
KAUST Grant Number
CRG-2953Date
2018-08-21Permanent link to this record
http://hdl.handle.net/10754/628787
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Achieving exact balance between spatially separated gain and loss is generally regarded as a necessary condition for parity-time- (PT-)symmetric optical systems. We introduce generalized PT- (GPT-)symmetric optical structures, which have an asymmetric and unbalanced gain-loss profile, while exhibiting similar scattering properties and phase transitions as their traditional PT-symmetric counterparts. In particular, we show that the concept of GPT symmetry may help to reduce the threshold gain in achieving newly discovered PT-enabled applications, such as the coherent perfect absorber laser and exceptional points. The concept proposed herein will facilitate the practice of PT-symmetric optical and photonic devices by offering greater design flexibility to tailor gain-loss profiles and their thresholds.Citation
Sakhdari M, Estakhri NM, Bagci H, Chen P-Y (2018) Low-Threshold Lasing and Coherent Perfect Absorption in Generalized \nPT\n-Symmetric Optical Structures. Physical Review Applied 10. Available: http://dx.doi.org/10.1103/PhysRevApplied.10.024030.Sponsors
P.-Y. C. would like to thank NSF ECCS-1711409 Grant. H.B. would like to thank KAUST CRG-2953 Grant for supporting the research reported in this publication.Publisher
American Physical Society (APS)Journal
Physical Review Appliedae974a485f413a2113503eed53cd6c53
10.1103/PhysRevApplied.10.024030