Breaking Anti-$\mathcal{PT}$ Symmetry by Spinning a Resonator

揭示非线性光学有机微环谐振器中的机械运动

Unveiling Mechanical Motions in Non-linear Optical Organic Micro Ring Resonators

研究通过动态运动和三维空间操控有机微环谐振器，展示其机械可重构性及非线性光学特性，拓展了三维空间控制能力。

通过纳米颗粒扰动操控非厄米光学系统中的光谱跃迁与光子传输

Manipulating spectral transitions and photonic transmission in a non-Hermitian optical system through nanoparticle perturbations

本文研究纳米颗粒扰动下线性旋转谐振器中反-PT对称非厄米系统向准闭合厄米系统的光谱跃迁，提出构建准闭合系统的条件并分析其光子传输动力学，为耗散量子器件设计提供理论指导。

Optimal antibunching in passive photonic devices based on coupled nonlinear resonators

We propose the use of weakly nonlinear passive materials for prospective applications in integrated quantum photonics. It is shown that strong enhancement of native optical nonlinearities by electromagnetic field confinement in photonic crystal resonators can lead to single-photon generation only exploiting the quantum interference of two coupled modes and the effect of photon blockade under resonant coherent driving. For realistic system parameters in state of the art microcavities, the efficiency of such single-photon source is theoretically characterized by means of the second-order correla…

Quantum Optics Model of Surface Enhanced Raman Spectroscopy for Arbitrarily Shaped Plasmonic Resonators

We present a self-consistent quantum optics approach to calculating the surface enhanced Raman spectrum of molecules coupled to arbitrarily shaped plasmonic systems. Our treatment is intuitive to use and provides fresh analytical insight into the physics of the Raman scattering near metallic surfaces and can be applied to a wide range of geometries including resonators, waveguides, as well as hybrid photonic-plasmonic systems. Our general theory demonstrates that the detected Raman spectrum originates from an interplay between nonlinear light generation and propagation. Counter intuitively, at…

Realization of bound states in the continuum in anti-PT-symmetric optical systems

Novel physical concepts that originate from quantum mechanics, such as non-Hermitian systems (dealing mostly with PT and anti-PT symmetry) and bound states in the continuum (BICs), have attracted great interest in the optics and photonics community. To date, BICs and anti-PT symmetry seem to be two independent topics. Here, we for the first time propose a parallel cascaded-resonator system to achieve BICs and anti-PT symmetry simultaneously. We found that the requirements for the Fabry-Pérot BIC and anti-PT symmetry can both be satisfied when the phase shift between any two adjacent resonators…

非互易耦合诱导光机械系统中的非厄米纠缠

Nonreciprocal Coupling Induced Non-Hermitian Entanglement in Optomechanical Systems

本文研究非厄米光机械系统中奇异点对纠缠的增强作用，并通过旋转谐振器实现经典与量子非互易性的切换。

通过反斯托克斯或斯托克斯相互作用及零光子探测增强或实现机械谐振器冷却的理论框架

Theoretical framework for enhancing or enabling cooling of a mechanical resonator via the anti-Stokes or Stokes interaction and zero-photon detection

本文提出一个理论框架，利用零光子探测在反斯托克斯和斯托克斯相互作用下实现或增强机械谐振器冷却，并给出所需探测效率条件，可应用于非经典态制备和量子热力学等领域。

Plasmonic nano-resonator enhanced one-photon luminescence from single gold nanorods

Strong Stokes and anti-Stokes one-photon luminescence from single gold nanorods is measured in experiments. It is found that the intensity and polarization of the Stokes and anti-Stokes emissions are in strong correlation. Our experimental observation discovered a coherent process in light emission from single gold nanorods. We present a theoretical mode, based on the concept of cavity resonance, for consistently understanding both Stokes and anti-Stokes photoluminescence. Our theory is in good agreement of all our measurements.

Solid-state laser refrigeration of a semiconductor optomechanical resonator

Photothermal heating represents a major constraint that limits the performance of many nanoscale optoelectronic and optomechanical devices including nanolasers, quantum optomechanical resonators, and integrated photonic circuits. Although radiation-pressure damping has been reported to cool an individual vibrational mode of an optomechanical resonator to its quantum ground state, to date the internal material temperature within an optomechanical resonator has not been reported to cool via laser excitation. Here we demonstrate the direct laser refrigeration of a semiconductor optomechanical res…

通过背景反共振调谐实现微波腔模式优化

Microwave Cavity Mode Optimisation by Background Anti-Resonance Tuning

本文提出通过调节腔体屏蔽层尺寸或利用Mach Zehnder干涉配置中的平衡偶极子探针控制外部相位，使低Q背景模式进入反共振状态，从而在不改变腔体尺寸的情况下实现高Q微波谐振模式的高对比度与对称线型。