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Faster recovery time of a hot-electron transition-edge sensor by use of normal metal heat-sinks



Brice R. Calkins, Adriana E. Lita, Anna E. Fox, Sae Woo Nam


Transition-edge sensor microcalorimeters with recovery times near 1 mu s have become highly desirable in quantum science applications as near-infrared single-photon detectors with photon-number resolving capability. Previously, the recovery times of these devices could be decreased only by changing device material or modifying the superconducting-to-normal transition. We demonstrate a method for improving this speed that uses a normal-metal heat-sink. This demonstration with tungsten devices realizes a factor of 4 decrease in recovery time without significantly affecting energy resolution. Our approach may enable the creation of high-efficiency transition-edge sensors with decay times short enough to operate with 80 MHz pulsed single-photon sources.
Applied Physics Letters


Single photon, transition edge sensor


Calkins, B. , Lita, A. , Fox, A. and Nam, S. (2011), Faster recovery time of a hot-electron transition-edge sensor by use of normal metal heat-sinks, Applied Physics Letters, [online], (Accessed May 26, 2024)


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Created December 12, 2011, Updated November 10, 2018