期刊
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
卷 45, 期 44, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1751-8113/45/44/444024
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资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [110T611]
- Turkish Academy of Sciences (TUBA)
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 coherent perfect absorbing lasers.
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