University of California, Riverside

Department of Electrical and Computer Engineering



UCR Researchers Demonstrate Acoustic Phonon Confinement Effects - Nature Communications Report


UCR Researchers Demonstrate Acoustic Phonon Confinement Effects - Nature Communications....
 
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UCR Researchers Demonstrate Acoustic Phonon Confinement Effects - Nature Communications Report

November 18, 2016

RIVERSIDE, Calif. (www.ucr.edu) — Controlling the flow of heat through semiconductor materials is an important challenge in developing smaller and faster computer chips, high-performance solar panels, and better lasers and biomedical devices. For the first time, an international team of scientists led by a researcher at the University of California, Riverside has modified the energy spectrum of acoustic phonons— elemental excitations, also referred to as quasi-particles, that spread heat through crystalline materials like a wave—by confining them to nanometer-scale semiconductor structures. The results have important implications in the thermal management of electronic devices. Led by Alexander Balandin, Distinguished Professor of Electrical and Computer Engineering and UC Presidential Chair Professor in UCR’s Bourns College of Engineering, the research is described in a paper published Thursday, Nov. 10, in the journal Nature Communications. The paper is titled “Direct observation of confined acoustic phonon polarization branches in free-standing nanowires.”

READ COMPLETE UCR PRESS RELEASE: https://ucrtoday.ucr.edu/42027

Photo: Fariborz Kargar, a graduate student researcher, is measuring the acoustic phonon dispersion in the semiconductor nanowires in UCR’s Phonon Optimized Engineered Materials (POEM) center, directed by Dr. Alexander Balandin.

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