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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

989
A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
989

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Single-photon microwave photonics.

Ye Yang1, Yaqing Jin2, Xiao Xiang2

  • 1State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100190, China.

Science Bulletin
|December 22, 2022
PubMed
Summary

Single-photon microwave photonics (SP-MWP) utilizes single-photon detectors for ultra-weak signal detection and high-speed processing. This novel approach achieves -100 dBm sensitivity and superior anti-interference capabilities.

Keywords:
High-speed signal processingQuantum microwave photonicSingle photonTime-correlated single photon counting

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Area of Science:

  • Quantum optics and microwave photonics.

Background:

  • High-speed processing and ultra-weak signal detection are critical bottlenecks in microwave photonics applications.
  • Single-photon detectors offer ultra-weak signal detection and low timing jitter, presenting a potential solution.

Purpose of the Study:

  • To introduce a novel concept of single-photon microwave photonics (SP-MWP).
  • To demonstrate a SP-MWP system for signal processing with phase shifting and frequency filtering.

Main Methods:

  • Development of a SP-MWP system utilizing a superconducting nanowire single-photon detector (SNSPD).
  • Integration of a successive time-correlated single photon counting (TCSPC) module for signal processing.
  • Experimental validation of phase shifting and frequency filtering functionalities.

Main Results:

  • Achieved ultrahigh optical sensitivity down to -100 dBm.
  • Demonstrated signal processing bandwidth limited only by single-photon detector timing jitter.
  • Exhibited ultrahigh anti-interference capability, extracting phase-locked signals from noise.

Conclusions:

  • The proposed SP-MWP concept offers a viable solution to overcome current microwave photonics limitations.
  • This work establishes a new interdisciplinary field: quantum microwave photonics.