TY - JOUR AU - Castelletto, Stefania AU - Degiovanni, Ivo AU - Migdall, Alan AU - Schettini, V C2 - Opts Exp DA - 2005-01-01 00:01:00 LA - en M1 - 13 PB - Opts Exp PY - 2005 TI - Spatial and spectral mode selection of heralded single photons from pulsed parametric down-conversion ER -