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Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors

Published

Author(s)

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

Abstract

We report on the photoresponse mapping of nanowire superconducting single-photon detectors using a focal spot significantly smaller than the device area (10X10 υ2). 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.
Citation
Applied Physics Letters
Volume
91
Issue
241108

Keywords

nano-optics, single-photon detectors

Citation

Hadfield, R. , Dalgarno, P. , O'Connor, J. , Ramsay, E. , Warburton, R. , Gansen, E. , Baek, B. , Stevens, M. , Mirin, R. and Nam, S. (2007), Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32730 (Accessed April 19, 2024)
Created December 12, 2007, Updated October 12, 2021