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Parity-time–symmetric microring lasers

- H. Hodaei, M. Miri, M. Heinrich, D. Christodoulides, M. Khajavikhan
- Physics, Medicine
- Science
- 21 November 2014

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

736 7- PDF

Thresholdless nanoscale coaxial lasers

- M. Khajavikhan, A. Simić, +5 authors Y. Fainman
- Physics, Medicine
- Nature
- 24 August 2011

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 research… Expand

445 7- PDF

Topological insulator laser: Experiments

- M. Bandres, S. Wittek, +5 authors M. Khajavikhan
- Physics, Medicine
- Science
- 16 March 2018

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 in… Expand

432 6- PDF

Non-Hermitian physics and PT symmetry

- R. El-Ganainy, K. Makris, M. Khajavikhan, Z. Musslimani, S. Rotter, D. Christodoulides
- Physics
- 2018

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 loss… Expand

703 5

Enhanced sensitivity at higher-order exceptional points

- H. Hodaei, A. U. Hassan, +4 authors M. Khajavikhan
- Physics, Medicine
- Nature
- 9 August 2017

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

517 5

Edge-Mode Lasing in 1D Topological Active Arrays.

- M. Parto, S. Wittek, +7 authors M. Khajavikhan
- Physics, Medicine
- Physical review letters
- 15 March 2018

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 promote… Expand

219 5- PDF

Topological insulator laser: Theory

- G. Harari, M. Bandres, +5 authors M. Segev
- Physics, Medicine
- Science
- 16 March 2018

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 in… Expand

307 4- PDF

Nonlinear reversal of the PT -symmetric phase transition in a system of coupled semiconductor microring resonators

- A. U. Hassan, H. Hodaei, M. Miri, M. Khajavikhan, D. Christodoulides
- Physics
- 14 October 2015

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 ramifications… Expand

51 3- PDF

Topological Insulator Laser

- M. Bandres, S. Wittek, +5 authors M. Khajavikhan
- Materials Science
- 16 September 2018

We demonstrate a nonmagnetic topological insulator laser exhibiting topologically-protected transport. The topological properties of the system give rise to single mode lasing, robustness against… Expand

33 3- PDF

Ultrasensitive micro-scale parity-time-symmetric ring laser gyroscope.

- J. Ren, H. Hodaei, +5 authors M. Khajavikhan
- Physics, Medicine
- Optics letters
- 10 April 2017

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 the… Expand

62 2- PDF

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