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arXiv 2407.03591physics.optics
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控制准参量放大:从多重PT对称相变到非厄米传感

Controlling quasi-parametric amplifications: From multiple PT-symmetry phase transitions to non-Hermitian sensing

Xiaoxiong Wu, Kai Bai, Penghong Yu, Zhaohui Dong, Yanyan He, Jingui Ma, Vladislav V. Yakovlev, Meng Xiao, Xianfeng Chen, Luqi Yuan

AI总结:

本研究探索准参量放大(QPA)的新相互作用机制,发现其多重PT对称相变对外部参数敏感,证明检测掺杂吸收体$10^{-11}$级不均匀性的可行性(灵敏度较线性吸收机制高一个数量级),并提供新型非线性光学传感机制。

摘要:

准参量放大(QPA)是一种非线性相互作用,其中闲频波通过某种损耗机制被耗尽。QPA在超快光子学的信号放大和量子光产生中起着重要作用。QPA过程具有一系列以非厄米宇称-时间($\mathcal{PT}$)对称为特征的特性。在本报告中,我们探索了新的相互作用机制,发现在此类QPA过程中存在多重$\mathcal{PT}$对称相变,这些相变对外部参数特别敏感。特别是,我们证明了检测掺杂吸收体$10^{-11}$级不均匀性的可行性,这比线性吸收机制下的类似测量灵敏度高一个数量级。在此过程中,我们揭示了QPA过程中出现的一系列$\mathcal{PT}$对称相变,并为精密光学测量提供了一种新颖的非线性光学传感机制。

英文摘要:

Quasi-parametric amplification (QPA) is a nonlinear interaction in which the idler wave is depleted through some loss mechanism. QPA plays an important role in signal amplification in ultrafast photonics and quantum light generation. The QPA process has a number of features characterized by the non-Hermitian parity-time ($\mathcal{PT}$) symmetry. In this report, we explore new interaction regimes and uncover multiple $\mathcal{PT}$-symmetry phase transitions in such QPA process where transitions are particularly sensitive to external parameters. In particular, we demonstrate the feasibility of detection of $10^{-11}$ inhomogeneities of the doped absorber, which is order of magnitude more sensitive than similar measurements performed in a linear absorption regime. In doing so, we reveal a family of $\mathcal{PT}$-symmetry phase transitions appearing in the QPA process and provide a novel nonlinear optical sensing mechanism for precise optical measurements.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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