Photonics Research, 2018, 6 (4): 040000A1, Published Online: Jul. 10, 2018  

Dispersive non-Hermitian optical heterostructures

Author Affiliations
1 Research & Innovation, Technicolor R&D France, 975 avenue des Champs Blancs, 35576 Cesson-Sévigné, France
2 CCQCN, Department of Physics, University of Crete, P.O. Box 2208, 71003 Heraklion, Greece
3 College of Optics & Photonics-CREOL, University of Central Florida, Orlando, Florida 32816, USA
4 Institute of Electronic Structure and Laser, Foundation for Research and Technology–Hellas, P.O. Box 1527, 71110 Heraklion, Greece
5 National University of Science and Technology MISiS, Leninsky prosp. 4, Moscow 119049, Russia
Abstract
The effect of material dispersion on the optical properties of one-dimensional non-Hermitian scattering systems is investigated in detail. In particular, multilayer heterostructures with gain and loss (parity-time symmetric or not) are examined by taking into account the dispersion of each layer. The exceptional points and phase transitions are characterized based on the spectrum of the corresponding scattering matrix. We demonstrate that an on-average lossy heterostructure can amplify an incident plane wave in the frequency range associated with the emission frequency of the layer with gain.

O. V. Shramkova, K. G. Makris, D. N. Christodoulides, G. P. Tsironis. Dispersive non-Hermitian optical heterostructures[J]. Photonics Research, 2018, 6(4): 040000A1.

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