scholarly journals Theoretical study of negative optical mode splitting inLaAlO3

2016 ◽  
Vol 93 (13) ◽  
Author(s):  
Kurt D. Fredrickson ◽  
Chungwei Lin ◽  
Stefan Zollner ◽  
Alexander A. Demkov
Keyword(s):  
Theoretical Study ◽  
Optical Mode ◽  
Mode Splitting

scholarly journals Anti-$\mathcal{PT}$-symmetric Kerr gyroscope

2021 ◽  
Author(s):  
Huilai Zhang ◽  
Meiyu Peng ◽  
Xun-Wei Xu ◽  
Hui Jing
Keyword(s):  
Detection Threshold ◽  
Kerr Nonlinearity ◽  
Optical Mode ◽  
Spectral Singularities ◽  
Exceptional Points ◽  
Rotation Measurement ◽  
Mode Splitting ◽  
External Signals ◽  
Spectral Responses ◽  
Conventional Device

Abstract Non-Hermitian systems can exhibit unconventional spectral singularities called exceptional points (EPs). Various EP sensors have been fabricated in recent years, showing strong spectral responses to external signals. Here we propose how to achieve a nonlinear anti-parity-time ($\mathcal{APT}$) gyroscope by spinning an optical resonator. We show that, in the absence of any nonlinearity, the sensitivity or optical mode splitting of the linear device can be magnified up to 3 orders than that of the conventional device without EPs. Remarkably, the $\mathcal{APT}$ symmetry can be broken when including the Kerr nonlinearity of the materials and, as the result, the detection threshold can be significantly lowered, i.e., much weaker rotations which are well beyond the ability of a linear gyroscope can now be detected with the nonlinear device. Our work shows the powerful ability of $\mathcal{APT}$ gyroscopes in practice to achieve ultrasensitive rotation measurement.

Theoretical Study of a Broadband Quasi-Optical Mode Converter for Pulse Gyrotron Devices

2016 ◽  
Vol 44 (10) ◽  
pp. 2348-2355 ◽  
Author(s):  
Chao-Hai Du ◽  
Xiang-Bo Qi ◽  
Pu-Kun Liu
Keyword(s):  
Theoretical Study ◽  
Mode Converter ◽  
Optical Mode
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