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An electrically pumped phonon-polariton laser.

ABSTRACT: We report a device that provides coherent emission of phonon polaritons, a mixed state between photons and optical phonons in an ionic crystal. An electrically pumped GaInAs/AlInAs quantum cascade structure provides intersubband gain into the polariton mode at λ = 26.3 μm, allowing self-oscillations close to the longitudinal optical phonon energy of AlAs. Because of the large computed phonon fraction of the polariton of 65%, the emission appears directly on a Raman spectrum measurement, exhibiting a Stokes and anti-Stokes component with the expected shift of 48 meV.

SUBMITTER: Ohtani K 

PROVIDER: S-EPMC6625821 | biostudies-other | 2019 Jul

REPOSITORIES: biostudies-other

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An electrically pumped phonon-polariton laser.

Ohtani Keita K   Meng Bo B   Franckié Martin M   Bosco Lorenzo L   Ndebeka-Bandou Camille C   Beck Mattias M   Faist Jérôme J  

Science advances 20190712 7

We report a device that provides coherent emission of phonon polaritons, a mixed state between photons and optical phonons in an ionic crystal. An electrically pumped GaInAs/AlInAs quantum cascade structure provides intersubband gain into the polariton mode at λ = 26.3 μm, allowing self-oscillations close to the longitudinal optical phonon energy of AlAs. Because of the large computed phonon fraction of the polariton of 65%, the emission appears directly on a Raman spectrum measurement, exhibiti  ...[more]