Second-harmonic generation allows for coherently bridging distant regions of the optical
spectrum, with applications ranging from laser technology to self-referencing of frequency …

Visible, high-coherence optical sources are important to a wide range of applications
spanning spectroscopy to precision timing. Integration of these sources on a semiconductor …

Silicon photonics lacks a second-order nonlinear optical (χ (2)) response in general,
because the typical constituent materials are centrosymmetric and lack inversion symmetry …

Quasi-phase-matching has long been a widely used approach in nonlinear photonics,
enabling efficient parametric frequency conversions such as second-harmonic generation …

The availability of nonlinear parametric processes, such as frequency conversion in
photonic integrated circuits is essential. In this contribution, we demonstrate a highly tunable …

In this paper, we demonstrate efficient spontaneous quasi-phase matched (SQPM) second
harmonic generation (SHG) in a micro-racetrack resonator on X-cut thin film lithium niobate …

Nonlinear harmonic generation is widely used to extend the emission wavelength of laser
sources. These devices typically require high peak powers to generate sufficient nonlinear …

Silicon is well known for its strong third-order optical nonlinearity, exhibiting efficient
supercontinuum and four-wave mixing processes. A strong second-order effect that is …

Nonlinear wavelength conversion is essential for many classical and quantum pho-tonic
applications. The underlying second-order nonlinear optical processes, however, generally …

Integrated photonics provides unprecedented opportunities to pursue advanced nonlinear
light sources with low-power consumptions and small footprints in a scalable manner, such …