Xiang Zhang
Chancellor's Professor of Mechanical Engineering
Department of Mechanical Engineering
xzhang@me.berkeley.edu
(510) 643-4978

Research Expertise and Interest

mechanical engineering, rapid prototyping, semiconductor manufacturing, photonics, micro-nano scale engineering, 3D fabrication technologies, microelectronics, micro and nano-devices, nano-lithography, nano-instrumentation, bio-MEMS

In Research News

April 4, 2016

Scientists at the Berkeley Lab have taken a big step toward the practical application of “valleytronics,” which is a new type of electronics that could lead to faster and more efficient computer logic systems and data storage chips in next-generation devices.

June 26, 2015

A new route to ultrahigh density, ultracompact integrated photonic circuitry has been discovered by researchers with the  Lawrence Berkeley National Laboratory and UC Berkeley. The team has developed a technique for effectively controlling pulses of light in closely packed nanoscale waveguides, an essential requirement for high-performance optical communications and chip-scale quantum computing.

July 20, 2014

A team of researchers at UC Berkeley have found a way to dramatically increase the sensitivity of a light-based plasmon sensor to detect incredibly minute concentrations of explosives. The sensor could potentially be used to sniff out a hard-to-detect explosive popular among terrorists.

Gold plasmonic nanostructures shaped like Swiss-crosses can convert laser light into ultrahigh frequency (10GHz) sound waves.
June 11, 2014

An advance has been achieved towards next generation ultrasonic imaging with potentially 1,000 times higher resolution than today’s medical ultrasounds. Researchers with the DOE’s Lawrence Berkeley National Laboratory have demonstrated a technique for producing, detecting and controlling ultrahigh frequency sound waves at the nanometer scale.

December 5, 2013

The Information Age will get a major upgrade with the arrival of quantum processors many times faster and more powerful than today’s supercomputers. For the benefits of this new Information Age 2.0 to be fully realized, however, quantum computers will need fast and efficient multi-directional light sources.

September 28, 2012

A tiny laser that could enable smaller and faster smart phones and tablets. A glucosamine-like supplement that targets the underlying cause of multiple sclerosis. These are among research projects getting a boost this year from a UC grants program.

September 24, 2012

Imagine a clock that will keep perfect time forever, even after the heat-death of the universe. An international team of scientists led by researchers with the Berkeley Lab and UC Berkeley has proposed the experimental design of a space-time crystal based on an electric-field ion trap and the Coulomb repulsion of particles that carry the same electrical charge.

July 10, 2012

A research team that includes engineers from UC Berkeley and the Lawrence Berkeley National Laboratory has created a way to quickly change the left-right orientation of molecules, or chirality, with a beam of light. The development could be applied across a wide range of fields, including reduced energy use for data-processing, homeland security and ultrahigh-speed communications.

July 29, 2011

It can’t quite cover Harry Potter, yet, but an invisibility cloak developed by UC Berkeley engineers was able to bounce visible light waves away from a microscopic object about as big as a red blood cell. The experiment using the reflective silicon oxide and silicon nitride material was described in the journal Nano Letters.

May 8, 2011

UC Berkeley researchers have shown that graphene, a one-atom-thick layer of crystallized carbon, can be tuned electrically to modify the amount of photons absorbed. This ability to switch light on and off is the fundamental characteristic of a network modulator, opening the door to optical computing in handheld electronics.

January 24, 2011

Berkeley Lab researchers have carried out the first experimental demonstration of GRIN plasmonics, a hybrid technology that opens the door to a wide range of exotic optics, including superfast photonic computers, ultra-powerful optical microscopes, and “invisibility” carpet-cloaking devices.

January 19, 2011

The secrets behind the mysterious nano-sized electromagnetic “hotspots” that appear on metal surfaces under a light are being revealed with the help of a BEAST. The results hold promise for solar energy and chemical sensing among other technologies.

December 19, 2010

UC Berkeley researchers have developed a new technique that allows plasmon lasers to operate at room temperature, overcoming a major barrier to practical utilization of the technology. Previous plasmon laser devices required temperatures as low as minus 450 degrees Fahrenheit to function properly.

November 5, 2010

New "metamaterials" can overcome some of the limitations of microscopes and imagers, including ultrasound imagers. Researchers in the Nano-scale Science & Engineering Center have come up with a metamaterial to improve the picture quality of ultrasound by a factor of 50.

Update Faculty Profile