News
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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Ever thinner solar cells
Thickness reduction can be a key element in the quest for cheaper and more efficient solar cells. Making solar cells at least 10 times thinner than commercial ones would save material, reduce manufacturing costs, and enable new …
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Experimental quantification of atomically resolved HAADF-STEM images using EDX
High-angle annular dark field (HAADF) images acquired in a scanning transmission electron microscope (STEM) contain a wealth information on the structure and chemical composition of semiconductor crystals down to the atomic level. To date, …
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