Energy resolution of terahertz single-photon-sensitive bolometric detectors

Details Energy resolution of terahertz single-photon-sensitive bolometric detectors Energy resolution of terahertz single-photon-sensitive bolometric detectors

2009-06-05

arxiv.org/abs/0906.1205v3

Appl. Phys. Lett. 96, 083505 (2010)

Physics

Condensed Matter

Superconductivity

11 pages (double-spaced), 5 figures; minor revisions

Scientific paper

We report measurements of the energy resolution of ultra-sensitive superconducting bolometric detectors. The device is a superconducting titanium nanobridge with niobium contacts. A fast microwave pulse is used to simulate a single higher-frequency photon, where the absorbed energy of the pulse is equal to the photon energy. This technique allows precise calibration of the input coupling and avoids problems with unwanted background photons. Present devices have an intrinsic full-width at half-maximum energy resolution of approximately 23 terahertz, near the predicted value due to intrinsic thermal fluctuation noise.

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