%0 Journal Article %T Reduced Deadtime and Higher Rate Photon-Counting Detection using a Multiplexed Detector Array %A S. Castelletto %A I. P. Degiovanni %A V. Schettini %A A. Migdall %J Physics %D 2006 %I arXiv %R 10.1080/09500340600779579 %X We present a scheme for a photon-counting detection system that can be operated at incident photon rates higher than otherwise possible by suppressing the effects of detector deadtime. The method uses an array of N detectors and a 1-by-N optical switch with a control circuit to direct input light to live detectors. Our calculations and models highlight the advantages of the technique. In particular, using this scheme, a group of N detectors provides an improvement in operation rate that can exceed the improvement that would be obtained by a single detector with deadtime reduced by 1/N, even if it were feasible to produce a single detector with such a large improvement in deadtime. We model the system for continuous and pulsed light sources, both of which are important for quantum metrology and quantum key distribution applications. %U http://arxiv.org/abs/quant-ph/0601102v1