SPC-150NXX with NbN Detector of JPL/NASA delivers IRF of 4.4 ps FWHM

 

A superconducting single-nanowire NbN detector in combination with a bh TCSPC module has delivered an instrument response function (IRF) of 4.4 ps full width at half maximum (FWHM). The detector is a collaborative development of MIT and JPL (Jet Propulsion Laboratory), the TCSPC module a modified SPC-150 NX device of Becker & Hickl GmbH with 204 fs per time channel. We have demonstrated the resolution of the system by recording the fluorescence decay of IR 1061, an infrared dye from Sigma Aldrich. The fluorescence lifetime of IR 1061 is known to be shorter than 50 ps. Nevertheless, the fluorescence decay was clearly resolved. Decay analysis with SPCImage delivered a fluorescence lifetime of 43.7 ps.

 

Figure 1: Fluorescence decay of IR 1061. Fluorescence lifetime is 43.7 ps.

 

Figure 2: IRF of Detector-TCSPC combination. FWHM of IRF is 4.4 ps.

 

For details please see https://www.becker-hickl.com/news/

 

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