Experimental observation of anomalous supralinear response of single-photon detectors

• URL: http://arxiv.org/abs/2109.08347v3
• Date: Fri, 5 May 2023 09:01:04 GMT
• Title: Experimental observation of anomalous supralinear response of single-photon detectors
• Authors: Josef Hlou\v{s}ek, Ivo Straka, Miroslav Je\v{z}ek
• Abstract summary: Single-source measurement of absolute nonlinearity of single-photon detectors with unprecedented accuracy. Sub- and supra-linear operation regimes of superconducting nanowire single-photon detectors are fully characterize. Results identify new detector anomalies that supersede existing knowledge of nonlinear effects at the single-photon level.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We demonstrate a direct single-source measurement of absolute nonlinearity of single-photon detectors with unprecedented accuracy. We discover a surprising supralinear behavior of single-photon avalanche diodes and show that it cannot be explained using known theoretical models. We also fully characterize sub- and supra-linear operation regimes of superconducting nanowire single-photon detectors and uncover the supralinearity under faint continuous illumination. The results identify new detector anomalies that supersede existing knowledge of nonlinear effects at the single-photon level.

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