Ultrafast Nonlinear Microphotonics
Ultrafast Microphotonics Lab
In the Ultrafast Microphotnics Lab, we work at the intersection of ultrafast optics and integrated photonics. We explore nonlinear optical processes enabled by the tight confinement of light in micro- and nano-structured photonic devices to create novel chip-integrated light sources for emerging application in science and technology.
To learn more about our research, please visit our research page.
News
Efficient quadrature squeezing in a photonic crystal microresonator
19 December 2025
In this work, we demonstrate single-mode quadrature squeezing in a silicon-nitride photonic-crystal microresonator. The carefully designed corrugation pattern enables precise, mode-resolved control of nonlinear parametric processes, allowing them to be selectively enabled or suppressed in a programmable manner. Using this approach, we achieve 7.8 dB of on-chip squeezing in a compact, integrated device.
Spectral dynamics of broadband optical frequency comb
28 July 2025
Optical frequency combs are key to optical precision measurements and nonlinear effects enable their broadband generation. Here we show, experimentally and numerically, that overlapping harmonics can have profound impact on the entire comb spectrum, leading to multiple interleaved combs across the entire spectrum. With the pump arranged to be offset-free, the entire spectrum can form an evenly spaced multi-octave frequency comb.
Self-Injection locking to silicon-nitride microresonator
29 October 2024
In this study, we develop a theoretical model and experimentally demonstrate semiconductor laser diode self-injection locking to a silicon nitride chip-integrated Fabry-Pérot microresonator. Using this approach we demonstrate semiconductor laser with Lorentzian linewidth below 400 Hz in the compact form-factor.