Ohtani K, Meng B, Franckié M, Bosco L, Ndebeka-Bandou C, Beck M, Faist J. An electrically pumped phonon-polariton laser.
SCIENCE ADVANCES 2019;
5:eaau1632. [PMID:
31309138 PMCID:
PMC6625821 DOI:
10.1126/sciadv.aau1632]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 06/05/2019] [Indexed: 05/28/2023]
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.
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