Lithium niobate (LN), first synthesized 70 years ago, has been widely used in diverse
applications ranging from communications to quantum optics. These high-volume …

The commercial success of radio-frequency acoustic filters in wireless communication
systems has launched aluminum nitride (AlN) as one of the most widely used …

Applications in timekee**, quantum sensing and quantum computing have sparked
growing demand for high-performance photonic integrated circuit (PIC) lasers at visible and …

Integrated nonlinear photonics provides transformative capabilities for controlling,
enhancing and manipulating material nonlinearities in miniaturized on-chip platforms. The …

The strength of interactions between photons in a χ^(2) nonlinear optical waveguide
increases at shorter wavelengths. These larger interactions enable coherent spectral …

Second-harmonic generation (SHG) extensively employs periodically poled nonlinear
crystals through forward quasi-phase-matching to achieve efficient frequency conversion. As …

The study has demonstrated a novel microcavity‐based flexible photon up‐conversion
system using second harmonic generation (SHG) from a polar nematic fluidic medium …

ScAlN is an emerging ferroelectric material that possesses large bandgap and strong
piezoelectricity and holds great promises for enhanced χ (2) nonlinearity. In this study, we …

On-chip ultraviolet (UV) sources are of great interest for building compact and scalable
atomic clocks, quantum computers, and spectrometers. However, few material platforms are …

In this contribution, we numerically investigate second harmonic generation in double-
layered lithium niobate on the insulator platform by means of the modal phase matching …