Due to the constantly increasing demand for single photon detection at telecom wavelengths, superconducting micron-scale bridges (SMSPDs) are attracting attention as a feasible alternative to superconducting nanowire superconducting detectors (SNSPDs). Simple geometry, combined with tunable wavelength response and compatibility with affordable, large-scale fabrication processes, make SMSPDs an alternative to conventional single photon detectors.
SMSPDs exhibit short recovery times and good temporal resolution, enabling integration into photonic circuits where high response rate is essential for reliable operation. We realized 2 µm wide NbTiN microbridge single photon detector integrated with a SiO2/TiO2 Bragg resonator, for the telecom C-band. Furthermore, we correlate the microbridge geometry with observed behavior to validate the quality of fabricated structures and monitor its effect on detector performance.
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