Hadfield, R.H. , Dalgarno, P.A., O’Connor, J.A., Ramsay, E., Warburton, R.J., Gansen, E.J., Baek, B., Stevens, M.J., Mirin, R.P. and Nam, S.W. (2007) Submicrometer photoresponse mapping of nanowire superconducting single-photon detectors. Applied Physics Letters, 91(24), p. 241108. (doi: 10.1063/1.2824384)
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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 μm2). 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.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Hadfield, Professor Robert |
| Authors: | Hadfield, R.H., Dalgarno, P.A., O’Connor, J.A., Ramsay, E., Warburton, R.J., Gansen, E.J., Baek, B., Stevens, M.J., Mirin, R.P., and Nam, S.W. |
| College/School: | College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering |
| Journal Name: | Applied Physics Letters |
| ISSN: | 0003-6951 |
| Published Online: | 13 December 2007 |
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