News

image not available

Source of correlated photons made (very) small!

Teams at Thales and C2N (CNRS/UPSaclay/UParis) have developed a novel miniaturized source of light called Photonic Crystal Optical Parametric Oscillator. An Optical Parametric Oscillator (OPO) is similar to a laser in that it generates coherent light, namely photons …

Read more...
image not available

Indirect to direct band gap crossover in two-dimensional WS2(1−x)Se2x alloys

Using angle-resolved photoemission spectroscopy (ARPES) combined with DFT calculations, physicists from the Center for Nanosciences and Nanotechnologies (C2N, Université Paris-Saclay / CNRS), in collaboration with researchers from Hunan University (China) demonstrated that high PL intensity value observed in WS0.4Se1.6 …

Read more...
image not available

Electrically injected parity-time symmetric distributed-feedback (DFB) laser diodes for telecom applications

Researchers at the Centre de Nanosciences et de Nanotechnologies (C2N), in collaboration with Laboratoire Charles Fabry (LCF) have reported single-frequency electrically-injected DFB laser diodes based on Parity-Time symmetric dual gratings in a standard ridge waveguide configuration, thus amenable to …

Read more...
image not available

On-Chip Mid-Infrared Supercontinuum Generation from 3 to 13 μm Wavelength

Mid-infrared spectroscopy is a universal way to identify chemical and biological substances. Indeed, when interacting with a light beam, most molecules are responsible for absorption at specific wavelengths in the mid-IR spectrum, allowing to detect and quantify …

Read more...
image not available

Slow propagation of 2 GHz acoustical waves in a suspended GaAs phononic waveguide on insulator

A team of researchers at C2N have demonstrated slow propagation of acoustical waves in the ultra high frequency regime (UHF) through a suspended GaAs phononic waveguide. The experimental demonstration of a group velocity below 1000 m/s can lead a delay …

Read more...