Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors

Robert H. Hadfield; Paul A. Dalgarno; John A. O'Connor; Euan Ramsay; Richard J. Warburton; Eric J. Gansen; Burm Baek; Martin J. Stevens; Richard P. Mirin; Sae Woo Nam

doi:10.1063/1.2824384

Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors

Robert H. Hadfield, Paul A. Dalgarno, John A. O'Connor, Euan Ramsay, Richard J. Warburton, Eric J. Gansen, Burm Baek, Martin J. Stevens, Richard P. Mirin, Sae Woo Nam

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

34 Citations (Scopus)

Abstract

We report on the photoresponse mapping of nanowire superconducting single-photon detectors using a focal spot significantly smaller than the device area (10×10 µ m2). Using a confocal microscope configuration and solid immersion lens, we achieve a spot size of 320 nm full width at half maximum onto the device at 470 nm wavelength. We compare the response maps of two devices: The higher detection efficiency device gives a uniform response, whereas the lower detection efficiency device is limited by a single defect or constriction. © 2007 American Institute of Physics.

Original language	English
Article number	241108
Journal	Applied Physics Letters
Volume	91
Issue number	24
DOIs	https://doi.org/10.1063/1.2824384
Publication status	Published - 2007

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10.1063/1.2824384

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author = "Hadfield, {Robert H.} and Dalgarno, {Paul A.} and O'Connor, {John A.} and Euan Ramsay and Warburton, {Richard J.} and Gansen, {Eric J.} and Burm Baek and Stevens, {Martin J.} and Mirin, {Richard P.} and Nam, {Sae Woo}",

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AU - Warburton, Richard J.

AU - Gansen, Eric J.

AU - Baek, Burm

AU - Stevens, Martin J.

AU - Mirin, Richard P.

AU - Nam, Sae Woo

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Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors

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