Scientists develop polariton nano-laser operating at room temperature

phys.org | 2/19/2019 | Staff
camkizzle (Posted by) Level 3
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A room temperature polariton nano-laser has been demonstrated, along with several related research findings, regarding topics such as polariton physics at the nanoscale and also applications in quantum information systems. The research was published in the journal, Science Advances.

DGIST announced on May 8 that a polariton nano-laser operating at room temperature was developed by Professor Chang-Hee Cho's team in the Department of Emerging Materials Science, in collaboration with Professor Seong-Ju Park at GIST and Professor Ritesh Agarwal at University of Pennsylvania. When an excitation of material by creating Coulomb-bound states of electron-hole pairs (excitons) strongly interacts with photons, a macroscopic quantum state of exciton-polaritons is formed, which receives properties of both the light and the matter, resulting in very energy-efficient coherent light sources, called 'polariton lasers.' The polariton laser is drawing much attention as the next generation laser technology because it can operate at ultralow power. However, its development has been limited due to the difficulties in controlling thermal stability of excitons, especially in nanoscale devices.

Limitations - Research - Team

To overcome such limitations, the research team used...
(Excerpt) Read more at: phys.org
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