Affiliation:
1. Research Institute of Superconductor Electronics, Nanjing University, Nanjing DC210093, China
2. Department of Applied Physics, Nanjing University of Aeronautics and Astronautics, Nanjing DC210016, China
Abstract
In this Letter, we report on a device with which to resolve photon numbers and positions simultaneously, using single-channel readout from superconducting nanowire single-photon detectors (SNSPDs). The nanowires in the SNSPDs are connected in series with parallel resistors for producing response pulses with different amplitudes, whose values obey a distribution of 1:2:4:,..,2n-1. In single-photon detection, a saturated counting rate is obtained at a low dark count rate (<10 cps). Furthermore, we observed 16 output modes corresponding one-to-one with 16 states (15 photon responses + 1 state without photons) in multiphoton mode. This structure not only inherits the advantages of high quantum efficiency and low dark count rate of traditional SNSPD, but also realizes the resolution of photon position and number simultaneously without complicated optical system. Thus, this proposal offers a promising platform for realizing scalable and practical quantum information chips.
Funder
the National Key R&D Program of China
the National Natural Science Foundation of China
Key-Area Research and Development Program of Guangdong Province
the Fundamental Research Funds for the Central Universities
the Priority Academic Program Development of Jiangsu Higher Education Institutions
the Recruitment Program for Young Professionals
the Qing Lan Project and the Jiangsu Provincial Key Laboratory of Advanced Manipulating Technique of Electromagnetic Waves
Subject
Physics and Astronomy (miscellaneous)
Cited by
4 articles.
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