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Phonon-enhanced molecular vibrational spectroscopy at the strong coupling limit

Lunes, Octubre 16, 2017 - 11:00
nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian
Marta Autore, Nanooptics Group
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Enhanced light-matter interactions are the basis of surface enhanced infrared absorption (SEIRA) spectroscopy, and conventionally rely on plasmonic materials and their capability to focus light to nanoscale spot sizes. Phonon-polariton nanoresonators made of polar crystals could represent an interesting alternative, since they exhibit large quality factors, which go far beyond those of their plasmonic counterparts. In the talk I will present latest results on phonon-polariton-resonant h-BN ribbons for SEIRA detection of small amounts of organic molecules in Fourier transform infrared spectroscopy. Strikingly, the interaction between phonon-polaritons and molecular vibrations reaches experimentally the onset of the strong coupling regime, envisioning opportunities for active control of chemical reactivity and infrared quantum cavity optics experiments based on phononic resonators.  

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