Giant Enhancement of Rotation Sensing with PT-Symmetric Circular Bragg Lasers
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AbstractPT-symmetric systems can be used as ultrasensitive sensors by exploiting the non-Hermitian degeneracy at the exceptional point. However, operating and controlling these systems at the exceptional point are usually difficult. Here, we study the effect of rotation on threshold gain of circular Bragg lasers with radial PT symmetry. We find that, even deviating away from the exceptional point, these lasers can provide a two-orders-of-magnitude enhancement in the rotation sensitivity compared with the conventional circular Bragg lasers of similar geometry and threshold gain. Additionally, these lasers are more robust against perturbation in operating condition than sensors that must operate at the exceptional point.
All Author(s) ListFeng ZY, Sun XK
Journal namePhysical Review Applied
Volume Number13
Issue Number5
Article number054078
LanguagesEnglish-United States

Last updated on 2021-25-02 at 00:19