Low-Threshold Lasing and Coherent Perfect Absorption in Generalized \nPT\n-Symmetric Optical Structures
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
KAUST Grant NumberCRG-2953
Permanent link to this recordhttp://hdl.handle.net/10754/628787
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AbstractAchieving 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.
CitationSakhdari 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.
SponsorsP.-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.
PublisherAmerican Physical Society (APS)
JournalPhysical Review Applied