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SUMMARY:Quantum optics with semiconductor nanostructures - Towards determi
 nistic sources for quantum communication networks - Stephan Reitzenstein (
 Technische Universitat\, Berlin)
DTSTART:20141124T153000Z
DTEND:20141124T170000Z
UID:TALK55278@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:The emerging field of quantum optics in semiconductor nanostru
 ctures has benefited enormously from the excellent optical properties of s
 elf-assembled quantum dots (QDs). Acting as high quality photon emitters\,
  they have paved the way for single photon sources\, and sources of entang
 led photon pairs [1]. Recently\, they allowed for the observation of spin-
 photon entanglement and quantum teleportation which are key results for fu
 ture quantum communication networks. \nIn this talk\, I will report on our
  recent developments in the deterministic fabrication of single QD quantum
  devices and on the realizationof coupledcQED systems. In particular\, ani
 n-situ electron beam lithography approach will be presented which allows u
 s to precisely pattern photononic nanostructures which are aligned to prer
 egisteredQDsinorder to boost their photon extraction efficiency in determi
 nistic quantum light sources [2\, 3]. Beyond the realization of single nan
 ophotonics structures Iwill also present a novel scheme for fully integrat
 ed on-chip quantum optics. Here\, we use for the first time an integrated 
 electrically driven QD-microlaser to resonantly excite a coupled QD-microc
 avity system operating in the weak coupling regime [4]. This concept can p
 ave the way for compact integrated sources of single photons and entangled
  photon pairs. \n[1] A. Shields\, Nat. Photonics1\, 215 -223 (2007) \n[2]M
 . Gschrey et al.\, Appl. Phys. Lett.102\, 251113 (2013)\n[3]M. Gschrey et 
 al.\, arXiv:1312.6298(2013)\n[4]E. Stock et al.\, Adv. Mat.25\, 707 (2013)
 \n
LOCATION:Mott Seminar Room (531)\, Cavendish Laboratory\, Department of Ph
 ysics
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