Unique optical characteristics of a Fabry-Perot resonator with embedded PT-symmetrical grating
Abstract
We explore the optical properties of a Fabry-Perot resonator with an embedded Parity-Time (PT) symmetrical grating. This PT-symmetrical grating is non diffractive (transparent) when illuminated from one side and diffracting (Bragg reflection) when illuminated from the other side, thus providing a unidirectional reflective functionality. The incorporated PT-symmetrical grating forms a resonator with two embedded cavities. We analyze the transmission and reflection properties of these new structures through a transfer matrix approach. Depending on the resonator geometry these cavities can interact with different degrees of coherency: fully constructive interaction, partially constructive interaction, partially destructive interaction, and finally their interaction can be completely destructive. A number of very unusual (exotic) nonsymmetrical absorption and amplification behaviors are observed. The proposed structure also exhibits unusual lasing performance. Due to the PT-symmetrical grating, there is no chance of mode hopping; it can lase with only a single longitudinal mode for any distance between the distributed reflectors.
Keywords
Cite
@article{arxiv.1405.6024,
title = {Unique optical characteristics of a Fabry-Perot resonator with embedded PT-symmetrical grating},
author = {Mykola Kulishov and Bernand Kress and H. F. Jones},
journal= {arXiv preprint arXiv:1405.6024},
year = {2015}
}
Comments
16 pages, 8 figures