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SUMMARY:Development of a SAW-driven source of polarised single photons - M
 r Antonio Rubino\, University of Cambridge\, Semiconductor Physics Group
DTSTART:20160615T131500Z
DTEND:20160615T141500Z
UID:TALK64329@talks.cam.ac.uk
CONTACT:Teri Bartlett
DESCRIPTION:Recent advances in controlling single carriers have shown that
  it is possible to transport single electrons back and forth between two q
 uantum dots using surface acoustic waves (SAWs)\, with potential applicati
 ons for quantum computation. We have developed devices in which both elect
 rons and holes can be induced in an undoped GaAs/AlGaAs well by gates to f
 orm a lateral n-p junction. SAWs\, generated by a transducer\, travel in t
 he n-region and collect electrons which are transported in the p-region wh
 ere they recombine with the holes. If the stream is composed of single ele
 ctrons\, the recombination with holes should produce a stream of single ph
 otons. Furthermore\, the recombination of spin-polarised electrons can gen
 erate circularly polarised photons\, providing a method of spin readout in
  a quantum computer and a way for conversion of spin qubits into photon qu
 bits. We are investigating the realisation of this potential polarised sin
 gle-photon source\; state of the progress and possible strategies will be 
 presented.
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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