Self-dual spectral singularities and coherent perfect absorbing lasers without $\mathcal {P}\mathcal {T}$-symmetry
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Publication:4913253
DOI10.1088/1751-8113/45/44/444024zbMATH Open1263.81173arXiv1205.4560OpenAlexW3123116528MaRDI QIDQ4913253
Author name not available (Why is that?)
Publication date: 5 April 2013
Published in: (Search for Journal in Brave)
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.
Full work available at URL: https://arxiv.org/abs/1205.4560
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