Ultralow-loss integrated photonics represents a transformative advance in optical technology, allowing light to propagate through chip-scale circuits with minimal energy dissipation. This progress has enabled the development of high-Q optical microresonators—miniature ring-shaped structures that confine light for extended durations. The quality factor (Q) quantifies a resonator's ability to store optical energy, where higher values correspond to lower loss. While silica microresonators have demonstrated exceptional Q factors exceeding 1 billion, silicon nitride (Si₃N₄) platforms offer superior integration capabilities with Q factors now surpassing 200 million. The field is rapidly evolving through heterogeneous integration of material systems and novel photonic designs that further reduce optical loss. As fabrication methods advance, these ultralow-loss photonic circuits are progressing from laboratory research to commercial foundry production.
Our research group specializes in creating ultralow-loss integrated photonic platforms and developing their applications in optical communications, sensing systems, and quantum technologies.
Optical frequency combs function as precise "rulers for light," enabling exact measurements of optical frequencies. Integrated microcombs are revolutionizing this field by condensing the functionality of millions of lasers onto a single, miniature photonic chip. Unlike their traditional counterparts—which were bulky, expensive, and power-intensive—our approach employs ultralow-loss photonic circuits and high-Q microresonators to create compact, energy-efficient, and turnkey-operable CMOS-compatible microcombs. These robust chips produce stable, broadband spectra, facilitating novel applications directly on-chip.
We create deployable optical frequency combs for high-capacity optical communications, ultra-precise spectroscopy, LIDAR, and microwave photonics that drive innovation across scientific and industrial domains.
The strongly enhanced photon–photon interactions in high-Q microresonators enable efficient nonlinear processes, including harmonic generation and parametric amplification, giving rise to exotic correlated states of light. In the classical regime, such systems exhibit novel phenomena including many extreme events. In the quantum domain, these microresonators facilitate the generation of entangled photons and squeezed light—fundamental resources for photonic quantum computing, secure communications, and ultra-precise metrology. Our team has achieved squeezing levels exceeding 4 dB and generated large-scale cluster states with over 60 modes on photonic chips.
Our group explores novel nonlinear optical phenomena in integrated photonic devices and specializes in developing programmable quantum photonic circuits for applications in quantum information processing, sensing, and networking.
Our research group utilizes integrated nonlinear photonics to transform narrowband lasers into broadband light sources. By leveraging second- and third-order nonlinear processes in specially engineered waveguides—such as periodically-poled lithium niobate and ultralow-loss silicon nitride—we enable supercontinuum generation directly on photonic chips. This approach creates tailored spectra for advanced applications in sensing, spectroscopy, and astronomical instrumentation.
We develop integrated photonic platforms that extend the reach of laser systems, providing compact and efficient solutions for generating light across critical wavelength bands.
Our research group focus on creating ultra-low-phase-noise, high-frequency microwave systems that are fundamental to modern wireless communications, precision radar, and resilient sensing applications. By harnessing microresonator-based optical frequency division, we have engineered the world's lowest-noise microwave chips, significantly enhancing signal purity, stability, and performance in high-demand systems. This breakthrough technology enables robust anti-jamming communications and high-resolution radar platforms with unprecedented accuracy and interference immunity.
We develop integrated photonic-electronic platforms that push the boundaries of microwave synthesis, enabling compact, high-performance solutions for next-generation communication and sensing systems.
Our research group leverages photonic integration to transform traditionally bulky measurement instruments into compact, high-performance chips capable of unprecedented accuracy. Particularly, we are combining miniature atomic references and integrated optical frequency combs to create chip-scale optical clocks, which can establish new time standards and can facilitate navigation and space missions.
We integrate atomics and photonics into new chip-based platforms for precision metrology, enabling breakthroughs in scientific discovery and space exploration.
Ultralow-loss integrated photonics represents a transformative advance in optical technology, allowing light to propagate through chip-scale circuits with minimal energy dissipation. This progress has enabled the development of high-Q optical microresonators—miniature ring-shaped structures that confine light for extended durations. The quality factor (Q) quantifies a resonator's ability to store optical energy, where higher values correspond to lower loss. While silica microresonators have demonstrated exceptional Q factors exceeding 1 billion, silicon nitride (Si₃N₄) platforms offer superior integration capabilities with Q factors now surpassing 200 million. The field is rapidly evolving through heterogeneous integration of material systems and novel photonic designs that further reduce optical loss. As fabrication methods advance, these ultralow-loss photonic circuits are progressing from laboratory research to commercial foundry production.
Our research group specializes in creating ultralow-loss integrated photonic platforms and developing their applications in optical communications, sensing systems, and quantum technologies.
Optical frequency combs function as precise "rulers for light," enabling exact measurements of optical frequencies. Integrated microcombs are revolutionizing this field by condensing the functionality of millions of lasers onto a single, miniature photonic chip. Unlike their traditional counterparts—which were bulky, expensive, and power-intensive—our approach employs ultralow-loss photonic circuits and high-Q microresonators to create compact, energy-efficient, and turnkey-operable CMOS-compatible microcombs. These robust chips produce stable, broadband spectra, facilitating novel applications directly on-chip.
We create deployable optical frequency combs for high-capacity optical communications, ultra-precise spectroscopy, LIDAR, and microwave photonics that drive innovation across scientific and industrial domains.
The strongly enhanced photon–photon interactions in high-Q microresonators enable efficient nonlinear processes, including harmonic generation and parametric amplification, giving rise to exotic correlated states of light. In the classical regime, such systems exhibit novel phenomena including many extreme events. In the quantum domain, these microresonators facilitate the generation of entangled photons and squeezed light—fundamental resources for photonic quantum computing, secure communications, and ultra-precise metrology. Our team has achieved squeezing levels exceeding 4 dB and generated large-scale cluster states with over 60 modes on photonic chips.
Our group explores novel nonlinear optical phenomena in integrated photonic devices and specializes in developing programmable quantum photonic circuits for applications in quantum information processing, sensing, and networking.
Our research group utilizes integrated nonlinear photonics to transform narrowband lasers into broadband light sources. By leveraging second- and third-order nonlinear processes in specially engineered waveguides—such as periodically-poled lithium niobate and ultralow-loss silicon nitride—we enable supercontinuum generation directly on photonic chips. This approach creates tailored spectra for advanced applications in sensing, spectroscopy, and astronomical instrumentation.
We develop integrated photonic platforms that extend the reach of laser systems, providing compact and efficient solutions for generating light across critical wavelength bands.
Our research group focus on creating ultra-low-phase-noise, high-frequency microwave systems that are fundamental to modern wireless communications, precision radar, and resilient sensing applications. By harnessing microresonator-based optical frequency division, we have engineered the world's lowest-noise microwave chips, significantly enhancing signal purity, stability, and performance in high-demand systems. This breakthrough technology enables robust anti-jamming communications and high-resolution radar platforms with unprecedented accuracy and interference immunity.
We develop integrated photonic-electronic platforms that push the boundaries of microwave synthesis, enabling compact, high-performance solutions for next-generation communication and sensing systems.
Our research group leverages photonic integration to transform traditionally bulky measurement instruments into compact, high-performance chips capable of unprecedented accuracy. Particularly, we are combining miniature atomic references and integrated optical frequency combs to create chip-scale optical clocks, which can establish new time standards and can facilitate navigation and space missions.
We integrate atomics and photonics into new chip-based platforms for precision metrology, enabling breakthroughs in scientific discovery and space exploration.