Abstract Second-order (χ (2)) optical nonlinearity is one of the most common mechanisms for
modulating and generating coherent light in photonic devices. Due to strong photon …

Silicon nitride (Si3N4) is an ever-maturing integrated platform for nonlinear optics but mostly
considered for third-order [χ (3)] nonlinear interactions. Recently, second-order [χ (2)] …

Optical nonlinear processes are indispensable in a wide range of applications, including
ultrafast lasers, microscopy, and quantum information technologies. Among the diverse …

Focus Serial: Frontiers of Nonlinear Optics Nonlinear photonic-crystal microresonators offer
unique fundamental ways of enhancing a variety of nonlinear optical processes. This …

The realization of high-quality (Q) resonators regardless of the underpinning material
platforms has been a ceaseless pursuit, because the high-Q resonators provide an extreme …

Optical microresonators with high quality (Q) factors are essential to a wide range of
integrated photonic devices. Steady efforts have been directed towards increasing …

We propose optimal designs for triply-resonant optical parametric oscillators (OPOs) based
on degenerate four-wave mixing (FWM) in microcavities. We show that optimal designs in …

Whispering gallery mode (WGM) microresonators, benefitting from the ultrahigh quality (Q)
factors and small mode volumes, could considerably enhance the light-matter interaction …

We demonstrate a high-Q amorphous silicon carbide (a-SiC) microresonator with optical Q
as high as 1.3× 10^ 5. The high optical quality allows us to characterize the third-order …

χ (3) nonlinearity enables ultrafast femtosecond scale light-to-light coupling and
manipulation of intensity, phase, and frequency. χ (3) nonlinear functionality in micro-and …