D L Boiko1,2,6,
N J Gunther3,
N Brauer1,
M Sergio1,
C Niclass1,
G B Beretta4
and
E Charbon1,5
1 Ecole Polytechnique Fédérale de Lausanne, 1015, Lausanne,
Switzerland
2 Centre Suisse d'Electronique et de Microtechnique SA, 2002,
Neuchâtel, Switzerland
3 Performance Dynamics, 4061 East Castro Valley Blvd, Suite
110, Castro Valley, CA, USA
4 HP Laboratories, 1501 Page Mill Road, Palo Alto, CA, USA
5 Delft University of Technology, 2628CD, Delft, The
Netherlands
6 Author to whom any correspondence should be addressed.
E-mail:
dmitri.boiko@csem.ch
Abstract. We report on a device
capable of imaging second-order spatio-temporal correlations g(2)(x,
τ) between photons. The imager is based on a monolithic array of
single-photon avalanche diodes (SPADs) implemented in CMOS technology
and a simple algorithm to treat multiphoton time-of-arrival
distributions from different SPAD pairs. It is capable of 80 ps
temporal resolution with fluxes as low as 10 photons s−1 at
room temperature. An important application might be the local imaging
of g(2) as a means of confirming the presence of
true Bose–Einstein macroscopic coherence (BEC) of cavity exciton
polaritons.
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