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DTSTART:20170326T030000
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DTSTART:20171029T020000
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DTSTAMP:20260428T072824Z
UID:5943a80513494321659401@ist.ac.at
DTSTART:20170629T113000
DTEND:20170629T123000
DESCRIPTION:Speaker: Arno Rauschenbeutel\nhosted by Johannes Fink\nAbstract
 : Controlling the interaction of light and matter is the basis for diverse
  applications ranging from light technology to quantum information process
 ing. Nowadays\, many of these applications are based on nanophotonic struc
 tures. It turns out that the confinement of light in such nanostructures i
 mposes an inherent link between its local polarization and its propagation
  direction\, also referred to as spin–momentum locking of light [K. Y. Bl
 iokh\, F. J. Rodríguez-Fortuño\, F. Nori\, and A. V. Zayats\, 2015]. Rem
 arkably\, this leads to chiral\, i.e.\, propagation direction-dependent ef
 fects in the emission and absorption of light\, and elementary processes o
 f light–matter interaction are fundamentally altered. For example\, when 
 coupling plasmonic particles or atoms to evanescent fields\, the intrinsic
  mirror symmetry of the particles’ emission can be broken. In our group\,
  we observed this effect in the interaction between single rubidium atoms 
 and the evanescent part of a light field that is confined by continuous to
 tal internal reflection in a whispering-gallery-mode microresonator [C. Ju
 nge\, D. O'Shea\, J. Volz\, and A. Rauschenbeutel\, 2013]. In the followin
 g\, this allowed us to realize chiral nanophotonic interfaces in which the
  emission direction of light into the structure is controlled by the polar
 ization of the excitation light [J. Petersen\, J. Volz\, and A. Rauschenbe
 utel\, 2014] or by the internal quantum state of the emitter [R. Mitsch\, 
 C. Sayrin\, B. Albrecht\, P. Schneeweiss\, and A. Rauschenbeutel\, 2014]\,
  respectively. Moreover\, we employed this chiral interaction to demonstra
 te an integrated optical isolator [C. Sayrin\, C. Junge\, R. Mitsch\, B. A
 lbrecht\, D. O'Shea\, P. Schneeweiss\, J. Volz\, and A. Rauschenbeutel\, 2
 015] as well as an integrated optical circulator [M. Scheucher\, A. Hilico
 \, E. Will\, J. Volz\, and A. Rauschenbeutel\, 2016] which operate at the 
 single-photon level and which exhibit low loss. The latter are the first t
 wo examples of a new class of nonreciprocal nanophotonic devices which exp
 loit the chiral interaction between single quantum emitters and transversa
 lly confined photons.
LOCATION:Meeting room Ground floor / Office Bldg West (I21.EG.127)\, ISTA
ORGANIZER:sdanzing@ist.ac.at
SUMMARY:Arno Rauschenbeutel: Chiral Quantum Optics
URL:https://talks-calendar.ista.ac.at/events/659
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