News
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 …
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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 …
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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 …
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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 …
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A Plug-and-play approach to integrated nanoacoustics
From taut strings vibrating in musical instruments to micro electro-mechanical systems for optoelectronics, vibrations cover an extensive range of applications. While at a macroscopic scale we are very familiar with these vibrations in air, i.e. sound, at …
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