Explanipedia

Turnkey soliton frequency combs from a linear fiber cavity with microresonator mirror Open

Hao Zhang, Shuangyou Zhang, Toby Bi, Yaojing Zhang, Haochen Yan , et al. · 2025

We demonstrate robust turnkey soliton frequency combs using a fiber Fabry-Pérot cavity laser. This believed to be novel linear fiber-laser-based approach leverages Rayleigh scattering from a microresonator to serve as a partial reflector t…

Visualization of nonlinear optics in a microresonator Open

Hao F. Zhang, Haochen Yan, Alekhya Ghosh, Shuangyou Zhang, Toby Bi , et al. · 2025

A precise understanding of nonlinear optical phenomena in whispering gallery mode (WGM) microresonators is crucial for developing next-generation integrated photonic devices. Applications include on-chip sensors for biomedical use, optical…

Microresonator soliton frequency combs via cascaded Brillouin scattering Open

Hao Zhang, Shuangyou Zhang, Toby Bi, George N. Ghalanos, Yaojing Zhang , et al. · 2025

Microresonator frequency combs are vital for advancing optical communications and sensing, but current methods face challenges in achieving low phase noise and flexible repetition rates simultaneously. Here, we demonstrate forward-propagat…

Inverse-Designed Silicon Nitride Nanophotonics Open

Toby Bi, Shuangyou Zhang, Egemen Bostan, Danxian Liu, Aditya S. Paul , et al. · 2025

Silicon nitride photonics has enabled integration of a variety of components for applications in linear and nonlinear optics, including telecommunications, optical clocks, astrocombs, bio-sensing, and LiDAR. With the advent of inverse desi…

Hybrid Nonlinear Effects in Photonic Integrated Circuits Open

Arghadeep Pal, Alekhya Ghosh, Shuangyou Zhang, Toby Bi, Masoud Kheyri , et al. · 2025

Nonlinear optics in photonic integrated circuits is usually limited to utilizing the nonlinearity of a single material. In this work, we demonstrate the use of hybrid optical nonlinearities that occur in two different materials. This appro…

Magnetite Nanoparticles with High Affinity Toward Target Protein for Efficient and Facile Bio‐Separation Open

Yafei Wang, Yaojing Zhang, Yibo Zhao, Zhuo Zhao, Jia Yao , et al. · 2025

Magnetite nanoparticles (Fe 3 O 4 NPs) with molecular recognition capabilities offer significant potential for biomedical applications, yet existing surface protein imprinting methods often suffer from low efficiency. Herein, a surface enz…

Near‐Infrared Dual‐Band Frequency Comb Generation from a Silicon Resonator Open

Keyi Zhong, Yaojing Zhang, Shuangyou Zhang, Yuanfei Zhang, Yuan Li , et al. · 2024

Benefitting from the mature, cost‐effective, and scalable manufacturing capabilities of complementary metal‐oxide‐semiconductor (CMOS) technology, silicon photonics has facilitated the seamless and monolithic integration of diverse functio…

Real-time imaging of standing-wave patterns in microresonators Open

Haochen Yan, Alekhya Ghosh, Arghadeep Pal, Hao Zhang, Toby Bi , et al. · 2024

Real-time characterization of microresonator dynamics is important for many applications. In particular, it is critical for near-field sensing and understanding light–matter interactions. Here, we report camera-facilitated imaging and anal…

Controlled light distribution with coupled microresonator chains via Kerr symmetry breaking Open

Alekhya Ghosh, Arghadeep Pal, Lewis Hill, Graeme N. Campbell, Toby Bi , et al. · 2024

Within optical microresonators, the Kerr interaction of photons can lead to symmetry breaking of optical modes. In a ring resonator, this leads to the interesting effect that light preferably circulates in one direction or in one polarizat…

Real-time imaging of standing-wave patterns in microresonators Open

Haochen Yan, Alekhya Ghosh, Arghadeep Pal, Hao Zhang, Toby Bi , et al. · 2024

Real-time characterization of microresonator dynamics is important for many applications. In particular it is critical for near-field sensing and understanding light-matter interactions. Here, we report camera-facilitated imaging and analy…

Polydispersity Modulation by Statistical Copolymerization of Meth-(Acrylate) Monomers with Disparate Reactivity: Enhanced Monomer Conversion and Tailored Polydispersity for Dielectric Elastomer Application Open

Keling Hu, Yaojing Zhang, Shun Liu, Chengkun Su, Jinming Sun , et al. · 2024

Low‐Temperature Sputtered Ultralow‐Loss Silicon Nitride for Hybrid Photonic Integration Open

Shuangyou Zhang, Toby Bi, Irina Harder, Olga Ohletz, Florentina Gannott , et al. · 2023

Silicon‐nitride‐on‐insulator (Si 3 N 4 ) photonic circuits have seen tremendous advances in many applications, such as on‐chip frequency combs, Lidar, telecommunications, and spectroscopy. So far, the best film quality has been achieved wi…

Microresonator soliton frequency combs via cascaded Brillouin scattering Open

Hao Zhang, Shuangyou Zhang, Toby Bi, George N. Ghalanos, Yaojing Zhang , et al. · 2023

We demonstrate Kerr soliton frequency comb generation that is seeded by a cascaded Brillouin scattering process. In this process, a pump laser is used to generate multiple orders of Brillouin sidebands in a microresonator, which in turn ge…

Geometry optimization for dark soliton combs in thin multimode silicon nitride microresonators Open

Yaojing Zhang, Shuangyou Zhang, Toby Bi, Pascal Del’Haye · 2023

Silicon nitride (Si 3 N 4 ) has been well established as an ultralow-loss material for integrated photonics, particularly for the generation of dissipative Kerr soliton frequency combs, enabling various applications for optical metrology, …

Room-Temperature Sputtered Ultralow-loss Silicon Nitride for Hybrid Photonic Integration Open

Shuangyou Zhang, Toby Bi, Irina Harder, Olga Lohse, Florentina Gannott , et al. · 2023

Silicon-nitride-on-insulator photonic circuits have seen tremendous advances in many applications, such as on-chip frequency combs, Lidar, telecommunications, and spectroscopy. So far, the best film quality has been achieved with low press…

Broadband high-Q multimode silicon concentric racetrack resonators for widely tunable Raman lasers Open

Yaojing Zhang, Keyi Zhong, Xuetong Zhou, Hon Ki Tsang · 2022

Quantum states of higher-order whispering gallery modes in a siliconmicro-disk resonator Open

Rakesh Ranjan Kumar, Yi Wang, Yaojing Zhang, Hon Ki Tsang · 2020

The quantum states of light in an integrated photonics platform provide an important resource for quantum information processing and take advantage of the scalability and practicality of silicon photonics. Integrated resonators have been w…

Radiation pressure and electrostriction induced enhancement for Kerr-like nonlinearities in a nanoscale silicon pedestal waveguide Open

Yaojing Zhang, Yifei Yao, Yi Dan, Hon Ki Tsang · 2020

The third-order optical nonlinearity in optical waveguides has found\napplications in optical switching, optical wavelength conversion, optical\nfrequency comb generation, and ultrafast optical signal processing. The\ndevelopment of an int…

Forward stimulated Brillouin scattering in silicon microring resonators Open

Yaojing Zhang, Liang Wang, Zhenzhou Cheng, Hon Ki Tsang · 2017

Stimulated Brillouin scattering (SBS) has been demonstrated in silicon waveguides in recent years. However, due to the weak interaction between photons and acoustic phonons in these waveguides, long interaction lengths are typically necess…

Enhanced optical nonlinearities in air-cladding silicon pedestal waveguides Open

Yaojing Zhang, Zhenzhou Cheng, Yifei Yao, Hon Ki Tsang · 2016

The third-order optical nonlinearity in optical waveguides has found applications in optical switching, optical wavelength conversion, optical frequency comb generation, and ultrafast optical signal processing. The development of an integr…

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