Practical applications implementing integrated photonic circuits can benefit from nonlinear
optical functionalities such as wavelength conversion, all-optical signal processing, and …

In its 60 years of existence, the field of nonlinear optics has gained momentum especially
over the past two decades thanks to major breakthroughs in material science and …

Techniques used to assist phase matching of second‐order nonlinearities in semiconductor
waveguides are reviewed. The salient points of each method are highlighted, with their …

We experimentally demonstrate practical approaches to enhance second-harmonic (SH)
generation in individual lithium niobate nanowires (NWs) with a sub-micrometer cross …

We report on the demonstration of correlated photon pair generation in a quasi-phase-
matched superlattice GaAs/AlGaAs waveguide using a continuous-wave pump. Our photon …

We review our recent progress on frequency conversion in integrated devices, focusing
primarily on experiments based on strip-loaded and quantum-well intermixed AlGaAs …

Wavelength conversion by difference frequency generation is demonstrated in domain-
disordered quasi-phase-matched waveguides. The waveguide structure consisted of a …

Second-harmonic generation using the type-II polarization configuration is demonstrated in
quasi-phase-matched GaAs/AlGaAs superlattice waveguides. Phase-matching wavelengths …

The components for monolithic integration of an all-optical frequency converter in GaAs-
AlGaAs superlattice-core material system are developed. The wavelength routing is …

Processes to achieve high spatial resolution ion implantation induced quantum well
intermixing in GaAs/AlGaAs superlattices have been developed. Ion implantation has been …