D L Boiko1,2,6, N
J Gunther3, N
Brauer1, M
Sergio1, C
Niclass1, G
B Beretta4 andE
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.