Engineering researchers at the University of Michigan have demonstrated a paradigm-shifting “polariton” laser that’s fueled not by light, but by electricity.
Polaritons are particles that are part light, and part matter.
“We report the first electrically injected polariton laser—a truly transformative result,” said Pallab Bhattacharya, the Charles M. Vest Distinguished University Professor of Electrical Engineering and Computer Science and the James R. Mellor Professor of Engineering, whose paper on the work is published online in Physical Review Letters.
“Since the proposal of such a device in 1996, researchers around the world have been trying to demonstrate it. It is no longer a scientific curiosity. It’s a real device.”
The new device requires at least 1,000 times less energy to operate, compared with a conventional laser, Bhattacharya says. He envisions its eventual use in any application where a laser is used today, such as in the optical communication field for wired Internet and in the medical field for surgery.
And as transistors—the building blocks of computers—reach their fundamental size limit over the coming decade, Bhattacharya says lasers like this one that are low-power and easier to modulate could play new roles in consumer electronics.
“Some of the communication on the chip and from chip to chip is going to move to optical communication, or lasers,” Bhattacharya said.
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