Energy-efficient laser works at room temperature

Energy-efficient laser works at room temperature

First practical polariton light source could improve medical devices

By Andrew Grant, 12:55 PM June 16, 2014

An energy-efficient alternative to the laser no longer requires a deep freeze. The first plug-in, room-temperature polariton laser, reported in the June 13 Physical Review Letters, could soon find its way into electronics and medical devices.

Traditional lasers work by stimulated emission, in which atoms energized by electric current emit light. In polariton lasers, light is emitted by polaritons, particle-like couplings of light and matter. While polariton devices will never produce laser bea...

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