Researchers at the French National Centre for Scientific Research, CNRS, and the University of Lorraine have recently developed a design for a coiled-up acoustic metasurface which can achieve total acoustic absorption in ...
General Physics
Feb 9, 2016
4
2096
(Phys.org)—In an attempt to harvest the kinetic energy of airflow, researchers have demonstrated the ability to harvest energy directly from the vibrations of a flexible, piezoelectric beam placed in a wind tunnel. While ...
Doctors have used focused ultrasound to destroy tumors without invasive surgery for some time. However, the therapeutic ultrasound used in clinics today indiscriminately damages cancer and healthy cells alike.
General Physics
Jan 7, 2020
1
18834
When it comes to low-frequency sound waves, traditional sound-absorbing materials tend to be undesirably bulky, heavy or thick.
General Physics
Sep 20, 2016
1
1436
(Phys.org)—For the first time, researchers have demonstrated that shining a nanosecond pulsed laser at the base of a 100-µm-long diamond needle can significantly enhance electron emission from the tip of the needle. The ...
Last year Asier Marzo, then a doctoral student at the Public University of Navarre, helped develop the first single-sided acoustic tractor beam—that is, the first realization of trapping and pulling an object using sound ...
General Physics
Jan 3, 2017
6
1982
The growing interest in deep-space exploration has sparked the need for powerful long-lived rocket systems to drive spacecraft through the cosmos. Scientists at the U.S. Department of Energy's (DOE) Princeton Plasma Physics ...
Plasma Physics
Dec 22, 2021
0
817
(Phys.org)—Scientists have designed and built an acoustic one-way tunnel that allows sound to pass through in one direction only while blocking it from passing through in the opposite direction. The tunnel is completely ...
In a paper that made the cover of the journal Applied Physics Letters, an international team of researchers has demonstrated an innovative technique for increasing the intensity of lasers. This approach, based on the compression ...
Optics & Photonics
Jul 3, 2020
2
2846
A new technique could offer a targeted approach to fighting cancer: low-intensity pulses of ultrasound have been shown to selectively kill cancer cells while leaving normal cells unharmed.
General Physics
Feb 5, 2020
4
9210
