Images of semiconductor “dot-in-rods” and their small clusters are studied by measuring the second-order correlation function with a spatially resolving intensified CCD camera. This measurement allows one to distinguish between a single dot and a cluster and, to a certain extent, to estimate the number of dots in a cluster. A more advanced measurement is proposed, based on higher-order correlations, enabling more accurate determination of the number of dots in a small cluster. Nonclassical features of the light emitted by such a cluster are analyzed.
© 2014 Optical Society of America
Original Manuscript: December 17, 2013
Revised Manuscript: February 14, 2014
Manuscript Accepted: February 19, 2014
Published: March 19, 2014
O. A. Shcherbina, G. A. Shcherbina, M. Manceau, S. Vezzoli, L. Carbone, M. De Vittorio, A. Bramati, E. Giacobino, M. V. Chekhova, and G. Leuchs, "Photon correlations for colloidal nanocrystals and their clusters," Opt. Lett. 39, 1791-1794 (2014)