• Publications
  • Influence
Parity-time–symmetric microring lasers
The ability to control the modes oscillating within a laser resonator is of fundamental importance. In general, the presence of competing modes can be detrimental to beam quality and spectral purity,Expand
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Thresholdless nanoscale coaxial lasers
The effects of cavity quantum electrodynamics (QED), caused by the interaction of matter and the electromagnetic field in subwavelength resonant structures, have been the subject of intense researchExpand
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Topological insulator laser: Experiments
Topological protection for lasers Ideas based on topology, initially developed in mathematics to describe the properties of geometric space under deformations, are now finding application inExpand
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Non-Hermitian physics and PT symmetry
In recent years, notions drawn from non-Hermitian physics and parity–time (PT) symmetry have attracted considerable attention. In particular, the realization that the interplay between gain and lossExpand
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Enhanced sensitivity at higher-order exceptional points
Non-Hermitian degeneracies, also known as exceptional points, have recently emerged as a new way to engineer the response of open physical systems, that is, those that interact with the environment.Expand
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Edge-Mode Lasing in 1D Topological Active Arrays.
We report the first observation of lasing topological edge states in a 1D Su-Schrieffer-Heeger active array of microring resonators. We show that the judicious use of non-Hermiticity can promoteExpand
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Topological insulator laser: Theory
Topological protection for lasers Ideas based on topology, initially developed in mathematics to describe the properties of geometric space under deformations, are now finding application inExpand
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Nonlinear reversal of the PT -symmetric phase transition in a system of coupled semiconductor microring resonators
A system of two coupled semiconductor-based resonators is studied when lasing around an exceptional point. We show that the presence of nonlinear saturation effects can have important ramificationsExpand
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Topological Insulator Laser
We demonstrate a nonmagnetic topological insulator laser exhibiting topologically-protected transport. The topological properties of the system give rise to single mode lasing, robustness againstExpand
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Ultrasensitive micro-scale parity-time-symmetric ring laser gyroscope.
We propose a new scheme for ultrasensitive laser gyroscopes that utilizes the physics of exceptional points. By exploiting the properties of such non-Hermitian degeneracies, we show that theExpand
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