Engineering AlGaAs-on-insulator towards quantum optical applications

分布式反馈实现色散工程的绝缘体上AlGaAs纳米光子学

Dispersion engineered AlGaAs-on-insulator nanophotonics by distributed feedback

本文提出一种基于分布式布拉格反射镜的绝缘体上AlGaAs线性谐振器，通过形状约束逆向设计定制色散分布，实验与模拟高度一致，为集成光路色散工程提供高效通用方案。

Ultra-efficient frequency comb generation in AlGaAs-on-insulator microresonators

Recent advances in nonlinear optics have revolutionized the area of integrated photonics, providing on-chip solutions to a wide range of new applications. Currently, the state of the art integrated nonlinear photonic devices are mainly based on dielectric material platforms, such as Si3N4 and SiO2. While semiconductor materials hold much higher nonlinear coefficients and convenience in active integration, they suffered in the past from high waveguide losses that prevented the realization of highly efficient nonlinear processes on-chip. Here we challenge this status quo and demonstrate an ultra…

非线性集成量子光子学与AlGaAs

Nonlinear integrated quantum photonics with AlGaAs

本文综述了AlGaAs在集成量子光子学中的应用，包括量子光源、光子电路和量子态工程，探讨了其在非线性光学和电光效应方面的优势及未来挑战。

Suspended photonic crystal membranes in AlGaAs heterostructures for integrated multi-element optomechanics

We present high-reflectivity mechanical resonators fabricated from AlGaAs heterostructures for use in free-space optical cavities operating in the telecom wavelength regime. The mechanical resonators are fabricated in slabs of GaAs and patterned with a photonic crystal to increase their out-of-plane reflectivity. Characterization of the mechanical modes reveals residual tensile stress in the GaAs device layer. This stress results in higher mechanical frequencies than in unstressed GaAs and can be used for strain engineering of mechanical dissipation. Simultaneously, we find that the finite wai…

使用AlGaAs微环谐振器阵列的高速率纠缠生成多功能芯片级平台

A Versatile Chip-Scale Platform for High-Rate Entanglement Generation using an AlGaAs Microresonator Array

提出一种基于AlGaAs微环谐振器阵列的芯片级平台，通过复用20个小半径谐振器克服纠缠生成的速率-密度权衡，实现了高保真度、高纯度及高生成率的光子纠缠与频率-bin量子比特编码。

绝缘衬底（Al）GaAs波导中2μm附近SPDC光子对的联合光谱表征

Joint spectral characterization of SPDC photon pairs near 2 $μ$m in (Al)GaAs-on-insulator waveguides

该研究针对2μm波段集成SPDC光子对源，利用绝缘衬底（Al）GaAs波导平台实现高效光子对产生，完成该波长下集成SPDC源的首次直接联合光谱表征，为相关量子应用提供支撑。

利用明亮混合III-V/硅光子器件实现双光子态生成与工程化

Biphoton state generation and engineering with bright hybrid III-V/Silicon photonic devices

本文提出一种异质集成III-V/SOI光子器件，将AlGaAs光子对源与SOI回路结合，通过多模倏逝耦合实现片上双光子态生成与工程化，生成速率超过10$^{6}$ s$^{-1}$mW$^{-1}$，符合-偶然符合比达600。

Submicron domain engineering in periodically poled lithium niobate on insulator

Lithium niobate on insulator (LNOI) is extensively researched for potential applications in telecommunication, sensing and quantum technology. Low-loss waveguides in LNOI have been demonstrated in recent years, with further works investigating their nonlinear optical properties via electric field poling. The fabrication imperfections and minimum feature size of inverted ferroelectric domains currently limit the efficiency and application of nonlinear processes in LNOI. This work looks into focused ion beam poling and demonstrates its potential to overcome the limitations of electric field poli…

Enhancement of second-harmonic generation in micropillar resonator due to the engineered destructive interference

We show, that engineering the cavity aspect ratio of AlGaAs micropillar resonator allows for the two order of magnitude increase in the efficiency of second harmonic generation at telecom wavelengths.

由连续谱中的双准束缚态增强的高效光子对产生

Efficient photon-pair generation empowered by dual quasi-bound states in the continuum

本研究利用支持双准束缚态的AlGaAs超表面增强自发参量下转换，实现高效光子对产生，产生率高达约10^4赫兹，比Mie共振纳米天线高两个数量级，为纳米尺度纠缠光子源提供新途径。

Quantitative infrared near-field imaging of suspended topological insulator nanostructures

The development of nanoscale solid-state devices exploiting the promising topological surface states of topological insulator materials requires careful device engineering and improved materials quality. For instance, the introduction of a substrate, device contact or the formation of oxide layers can cause unintentional doping of the material, spoiling the sought-after properties. In support of this, nanoscale imaging tools can provide useful materials information without the need for complex device fabrication. Here we study Bi$_2$Se$_3$ nanoribbons suspended across multiple material stacks …

合成时间-频率维度中的拓扑耗散光子学与拓扑绝缘体激光器

Topological Dissipative Photonics and Topological Insulator Lasers in Synthetic Time-Frequency Dimensions

该研究在合成时间-频率空间构建纯耗散耦合拓扑系统，揭示虚能带结构与边缘态模式竞争，并结合泵浦和饱和证明抗无序的类激光边缘态。