Researchers transmit energy with laser in ‘historic’ power-beaming demonstration

WASHINGTON — During a three-day-long tech demonstration at the David Taylor Model Basin at the Naval Surface Warfare Center in Bethesda, Maryland, attendees gathered to see a long-range, free-space power beaming system. Attendees this day, May 23, could see the system itself—the two 13-foot-high towers, one a 2-kilowatt laser transmitter, the other a receiver of specially designed photovoltaics. But the laser that was beaming 400 watts of power across 325 meters, from the transmitter to the receiver, was invisible to the naked eye. More

NRL Clarifies Valley Polarization for Electronic and Optoelectronic Technologies

WASHINGTON – An interdisciplinary team of scientists at the U.S. Naval Research Laboratory (NRL) has uncovered a direct link between sample quality and the degree of valley polarization in monolayer transition metal dichalcogenides (TMDs). In contrast with graphene, many monolayer TMDs are semiconductors and show promise for future applications in electronic and optoelectronic technologies. More

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