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SUMMARY:Localized Phonon Polaritons: A Novel Platform for Mid-Infrared Qua
 ntum Polaritonics - Dr Simone De Liberato
DTSTART:20170224T140000Z
DTEND:20170224T150000Z
UID:TALK71283@talks.cam.ac.uk
CONTACT:Dr Hamid Ohadi
DESCRIPTION:Optical phonons at the surface of a nanostructured polar cryst
 als can hybridize with light\, creating mixed excitations called localized
  phonon polaritons. Those interface-bound excitations are in many regards 
 mid-infrared analogous of localized plasmons supported by metallic resonat
 ors\, but they absent themselves from the Ohmic loss characteristic of pla
 smonic systems. Localized phonon polaritons are developing into an innovat
 ive platform for mid-infrared quantum polaritonics. This is due to their e
 xtremely small mode volumes\, long lifetimes\, and large nonlinearities\, 
 as well as the relative facility to fabricate nanoresonators with features
  at the 100nm scale. \nIn this talk I will give an overview of our investi
 gations into this innovative platform. I will start by reviewing localized
  phonon polaritons main features [1] and introducing a microscopic quantum
  theory capable of capturing their peculiar properties [2]. I will then pr
 esent some recent advances we obtained in this field: from the observation
  of strong coupling between localized and propagative modes [3]\, to nonli
 near polariton scattering [4\,5]. \n\n\n\n[1] C. R. Gubbin\, S. A. Maier\,
  and S. De Liberato\, PRB 95\, 035313 (2017)\n[2] C. R. Gubbin\, S. A. Mai
 er\, and S. De Liberato\, PRB 94\, 205301 (2016)\n[3] C. R. Gubbin\, et al
 .\, PRL 116\, 246402 (2016)\n[4] I. Razdolski\, et al.\, Nano Lett. 16\, 6
 9546959 (2016)  \n[5] C. R. Gubbin and S. De Liberato\, arXiv:1701.06729
LOCATION:Kapitza Building Seminar Room (16)\, Cavendish Laboratory\, Depar
 tment of Physics
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