Semicylindrical microresonator: excitation, modal structure, and Q factor

受激拉曼散射对 silica 微腔中暗孤子产生的影响

Impact of Stimulated Raman Scattering on Dark Soliton Generation in a Silica Microresonator

本文研究了 silica 微腔中受激拉曼散射对暗孤子产生的影响，通过分析参量增益与拉曼增益并基于 Lugiato-Lefever 方程数值模拟，发现激发暗孤子需适当的模式耦合和泵浦功率范围。

Coherent Perfect Absorption in Chaotic Optical Microresonators for Efficient Modal Control

Non-Hermitian wave engineering has attracted a surge of interest in photonics in recent years. One of the prominent phenomena is coherent perfect absorption (CPA), in which the annihilation of electromagnetic scattering occurs by destructive interference of multiple incident waves. This concept has been implemented in various platforms to demonstrate real-time control of absorption, scattering and radiation by varying the relative phase of the excitation signals. However, so far these studies have been limited to simple photonic systems involving single or few modes at well-defined resonant fr…

利用模态相位匹配桥接高Q值与Kerr非线性光子学

Bridging high-Q and Kerr-nonlinear photonics using modal phase matching

本文提出模态相位匹配方法，在氮化硅平台上实现高Q值Kerr微谐振器，解耦Q值与色散，实现高效参量振荡及宽波段波长产生。

Brillouin Backaction Thermometry for Modal Temperature Control

Stimulated Brillouin scattering provides optical gain for efficient and narrow-linewidth lasers in high-Q microresonator systems. However, the thermal dependence of the Brillouin process, as well as the microresonator, impose strict temperature control requirements for long-term frequency-stable operation. Here, we study Brillouin back action and use it to both measure and phase-sensitively lock modal temperature to a reference temperature defined by the Brillouin phase-matching condition. At a specific lasing wavelength, the reference temperature can be precisely set by adjusting resonator fr…

Coupling ideality of integrated planar high-Q microresonators

Chipscale microresonators with integrated planar optical waveguides are useful building blocks for linear, nonlinear and quantum optical devices. Loss reduction through improving fabrication processes has resulted in several integrated micro resonator platforms attaining quality (Q) factors of several millions. However only few studies have investigated design-dependent losses, especially with regard to the resonator coupling section. Here we investigate design-dependent parasitic losses, described by the coupling ideality, of the commonly employed microresonator design consisting of a microri…

Tunable frequency combs based on dual microring resonators

In order to achieve efficient parametric frequency comb generation in microresonators, external control of coupling between the cavity and the bus waveguide is necessary. However, for passive monolithically integrated structures, the coupling gap is fixed and cannot be externally controlled, making tuning the coupling inherently challenging. We design a dual-cavity coupled microresonator structure in which tuning one ring resonance frequency induces a change in the overall cavity coupling condition. We demonstrate wide extinction tunability with high efficiency by engineering the ring coupling…