Experimental investigation of the detection mechanism in WSi nanowire superconducting single photon detectors
We use quantum detector tomography to investigate the detection mechanism in WSi
nanowire superconducting single photon detectors. To this purpose, we fabricated a 250 nm
wide and 250 nm long WSi nanowire and measured its response to impinging photons with
wavelengths ranging from λ= 900 nm to λ= 1650 nm. Tomographic measurements show that
the detector response depends on the total excitation energy only. Moreover, for total
absorbed energies> 0.8 eV the current–energy relation is linear, similar to what was …
nanowire superconducting single photon detectors. To this purpose, we fabricated a 250 nm
wide and 250 nm long WSi nanowire and measured its response to impinging photons with
wavelengths ranging from λ= 900 nm to λ= 1650 nm. Tomographic measurements show that
the detector response depends on the total excitation energy only. Moreover, for total
absorbed energies> 0.8 eV the current–energy relation is linear, similar to what was …