Self-dual Spectral Singularities and Coherent Perfect Absorbing Lasers without PT-symmetry
Quantum Physics
2015-06-05 v2 High Energy Physics - Theory
Mathematical Physics
math.MP
Optics
Abstract
A PT-symmetric optically active medium that lases at the threshold gain also acts as a complete perfect absorber at the laser wavelength. This is because spectral singularities of PT-symmetric complex potentials are always accompanied by their time-reversal dual. We investigate the significance of PT-symmetry for the appearance of these self-dual spectral singularities. In particular, using a realistic optical system we show that self-dual spectral singularities can emerge also for non-PT-symmetric configurations. This signifies the existence of non-PT-symmetric CPA-lasers.
Keywords
Cite
@article{arxiv.1205.4560,
title = {Self-dual Spectral Singularities and Coherent Perfect Absorbing Lasers without PT-symmetry},
author = {Ali Mostafazadeh},
journal= {arXiv preprint arXiv:1205.4560},
year = {2015}
}
Comments
11 pages, 3 figures, 1 table, accepted for publication in J. Phys. A