Direction-Dependent Parity-Time Phase Transition and Non-Reciprocal Directional Amplification with Dynamic Gain-Loss Modulation
Optics
2019-01-23 v1 Quantum Physics
Abstract
We show that a dynamic gain-loss modulation in an optical structure can lead to a direction-dependent parity-time (PT) phase transition. The phase transition can be made thresholdless in the forward direction, and yet remains with a non-zero threshold in the backward direction. As a result, non-reciprocal directional amplification can be realized.
Cite
@article{arxiv.1806.00544,
title = {Direction-Dependent Parity-Time Phase Transition and Non-Reciprocal Directional Amplification with Dynamic Gain-Loss Modulation},
author = {Alex Y. Song and Yu Shi and Qian Lin and Shanhui Fan},
journal= {arXiv preprint arXiv:1806.00544},
year = {2019}
}
Comments
13 pages, 4 figures