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. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000356498Publication status
publishedExternal links
Journal / series
Science AdvancesVolume
Pages / Article No.
Publisher
AAASOrganisational unit
03759 - Faist, Jérôme / Faist, Jérôme
03759 - Faist, Jérôme / Faist, Jérôme
Funding
340975 - Quantum Metamaterials in the Ultra Strong Coupling Regime. (EC)
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