Ontology highlight
ABSTRACT:
SUBMITTER: Ohtani K
PROVIDER: S-EPMC6625821 | biostudies-other | 2019 Jul
REPOSITORIES: biostudies-other
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]