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oe1(光电查) - 科学论文

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  • A Low-Power, Inductorless Wideband Cryogenic Amplifier For Supercondcting Nanowire Single Photon Detector

    摘要： This paper presents a low-power, inductorless wideband cryogenic amplifier for superconducting nanowire single photon detector (SNSPD). To achieve wide bandwidth, low power consumption and small chip area, a modified Cherry-Hooper amplifier topology is used. With good input and output match, at 4.2 K temperature the measurement results show that the amplifier achieves 23-dB gain with a flat gain response, a 3-dB bandwidth (BW) of over 3.4 GHz, which covers frequencies as low as 130 kHz. Fabricated in a 0.13-μm silicon germanium (SiGe) BiCMOS technology, the amplifier core occupies a silicon area of only 0.075 mm2 and consumes a power of only 4 mW.

    关键词： low power,Cryogenic amplifier,wideband,Superconducting Nanowire Single Photon Detectors,SNSPD

    更新于2025-09-23 15:23:52

  • A stochastic SPICE model for superconducting nanowire single photon detectors and other nanowire devices

    摘要： Superconducting nanowire devices such as the superconducting nanowire single photon detector (SNSPD) or nanocryotron (nTron) have a time-dependent stochasticity that depends on the current flowing through them. When modeling complex circuits made of several such devices (for instance, an array of SNSPDs), the ability to include this randomness can be important for predicting unwanted effects and interactions within the circuit. We present a modification of the model described by Berggren et. al. that allows for the inclusion of this stochasticity into the nanowire device model. We then verify the model against experiment using a tungsten silicide SNSPD, and show that the modified model replicates the stochasticity of the physical device.

    关键词： SNSPD,SPICE model,Monte Carlo analysis,superconducting nanowire,nTron,stochasticity

    更新于2025-09-19 17:15:36