Near Unity Absorption in Tungsten films

Published

December 19, 2003

Author(s)

Danna Rosenberg, Sae Woo Nam, Aaron J. Miller, Arto Salminen, Erich N. Grossman, Robert E. Schwall, John M. Martinis

Abstract

The number resolving ability and extremely low dark count rate of tungsten transition-edge sensors (TESs) make them excellent candidates to replace avalanche photo diodes (APDs) in quantum information experiments, including quantum key distribution and quantum computing. Increasing the absorption of these devices from the current value of 20 % to 90 % or better would make these detectors even more desirable for these applications. By incorporating the tungsten in a stack of elements including a mirror and an anti-reflective coating, we have demonstrated room temperature absorption of greater than 95 % in films of tungsten.

Citation

Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment

Volume

520

Issue

1

Pub Type

Journals

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DOI Link

Keywords

telecommunication wavelengths, transition-edge sensors (TES), tungsten, absorption

Citation

Rosenberg, D. , Nam, S. , Miller, A. , Salminen, A. , Grossman, E. , Schwall, R. and Martinis, J. (2003), Near Unity Absorption in Tungsten films, Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment, [online], https://doi.org/10.1016/j.nima.2003.11.308 (Accessed October 2, 2025)