Nonlinear optical effects have been studied extensively in microresonators as more
photonics applications transitions to integrated on-chip platforms. Due to low optical losses …

Photonic integrated circuits hold promise as miniaturized and scalable platforms for classical
and quantum photonic information processing. Second-order nonlinearity (χ^(2)) is the basis …

Nonlinear high-harmonic generation in micro-resonators is a common technique used to
extend the operating range of applications such as self-referencing systems and coherent …

Optical parametric oscillators (OPOs) have been widely used for decades as tunable, narrow-
linewidth, and coherent light sources for reaching long wavelengths and are attractive for …

High quality factor optical microcavities have been employed in a variety of material systems
to enhance nonlinear optical interactions. While single-crystalline aluminum nitride …

Aluminum nitride and silicon nitride have recently emerged as important nonlinear optical
materials in integrated photonics for their quadratic and cubic optical nonlinearity …

Nonlinear microresonators can convert light from chip-integrated sources into new
wavelengths within the visible and near-infrared spectrum. For most applications, such as …

The lithium niobate integrated photonic platform has recently shown great promise in
nonlinear optics on a chip scale. Here, we report second-harmonic generation in a high-Q …

We present a novel device consisting of two microring resonators coupled by the second-
order nonlinear interaction. By independently controlling the microresonators' linear …

The absence of the single-photon nonlinearity has been a major roadblock in developing
quantum photonic circuits at optical frequencies. In this paper, we demonstrate a periodically …