Search results for phonons

Optics & Photonics Mar 26, 2020

Researchers develop acoustic cylindrical shell to measure liquid properties

Researchers from the Shenzhen Institutes of Advanced Technology (SIAT) of the Chinese Academy of Sciences developed a compact liquid sensor based on a liquid-filled glass cylindrical shell. Intrinsic circumferential modes ...

Materials Science Mar 23, 2020

Scientists develop ice-templated filler skeleton with enhanced thermal conductivity

A research team led by Dr. Sun Rong and Dr. Zeng Xiaoliang from the Shenzhen Institutes of Advanced Technology (SIAT) of the Chinese Academy of Sciences, in collaboration with Prof. Xu Jianbin from the Chinese University ...

Optics & Photonics Mar 27, 2020

Scientists grow novel Er3+ doped LuSGG mid-infrared laser crystal

A study team has grown an Er3+-doped lutetium scandium gallium garnet crystal with high doping concentration. And this was the first time to grow that kind of crystal by Czochralski method. The team also announced they have ...

Materials Science Mar 23, 2020

Aluminosilicate glasses can serve as visible luminescence materials

Broadband emissions in the visible spectral range can be achieved by pumping Pr3+ doped in crystal, ceramic and glass. Fluoride glasses are commonly used as host material of gain fiber due to their low-energy phonon distribution. ...

Optics & Photonics Mar 04, 2020

Coherent phonon dynamics realized in spatially separated mechanical resonators

A research group led by Prof. Guo Guoping, Song Xiangxiang, Deng Guangwei (now at UESTC), from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, in collaboration with Prof. Tian Lin ...

Optics & Photonics Mar 20, 2020

Symmetry-enforced three-dimension Dirac phononic crystals

Dirac semimetals are critical states of topologically distinct phases. Such gapless topological states have been accomplished by a band-inversion mechanism, in which the Dirac points can be annihilated pairwise by perturbations ...

Nanophysics Mar 06, 2020

Cooling magnets with sound

Today, most quantum experiments are carried out with the help of light, including those in nanomechanics, in which tiny objects are cooled with electromagnetic waves to such an extent that they reveal quantum properties. ...

General Physics Mar 10, 2020

Electrical power generation from moderate-temperature radiative thermal sources

Moderate-temperature thermal sources often radiate waste heat as a by-product of mechanical work, chemical or nuclear reactions, or information processing. In a new report in Science, Paul S. Davids and a research team at ...

General Physics Jan 29, 2020

Researchers generalize Fourier's 200-year-old heat equation, explaining hydrodynamic heat propagation

Michele Simoncelli, a Ph.D. student at EPFL, Andrea Cepellotti, a former EPFL student now at Harvard, and Nicola Marzari, head of EPFL's Theory and Simulation of Materials laboratory, have developed a novel set of equations ...

Materials Science Mar 20, 2020

Molecular vibrations reduce the maximum achievable photovoltage in organic solar cells

Scientists at TU Dresden and Hasselt University in Belgium investigated the physical causes that limit the efficiency of novel solar cells based on organic molecular materials. Currently, the voltage of such cells is still ...

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