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comparison, the surface lasers that are widely used in data communications and high-precision sensing, called VCSELs (vertical-cavity surface-emitting lasers), need much larger (100 times) arrays—and thus more power—to achieve lasing. “The popular VCSEL may one day
be replaced by what we’re calling the ‘BICSEL’—bound state in the continuum surface-emitting laser, which could lead to smaller devices that consume less power,” Kanté said.
radioactivity from water, a discovery that the researchers say could help purify the hundreds of millions of gallons of contaminated water stored after the Fukushima nuclear plant accident.
When perfection makes all the difference. ZEISS Car Body Solutions
Researchers at UC San Diego demon- strate the fi rst laser using bound states in the continuum (BICs). Left to right: Yeshaiahu Fainman, Boubacar Kanté, Ashok Kodigala and Babak Bahari.
The team has fi led a patent for the new type of light source. The team’s next step is to make BIC lasers that are electrically powered, rather than optically powered by another laser. “An electri- cally pumped laser is easily portable outside the lab and can run off a con- ventional battery source,” Kanté said. The research was supported by a National Science Foundation Career Award (ECCS-1554021), the Offi ce of Naval Research Multi-University Re- search Initiative (N000014-13-1-0678) and UC San Diego.
Treated Carbon Material Pulls Radioactive Elements from Water
A
team of researchers from Rice University (Houston) and Kazan Federal University (Kazan, Russia) have developed a method to extract
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March 2017 |
AdvancedManufacturing.org 31
Photo courtesy UC San Diego.
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