中国物理B ›› 2026, Vol. 35 ›› Issue (2): 24201-024201.doi: 10.1088/1674-1056/ae1c31

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Second-order correlated interference with multi-wavelength thermal-light beams

De-Sheng Wang(王德胜)1, Yi-Ning Zhao(赵一宁)1, Lingxin Kong(孔令鑫)1, Su-Heng Zhang(张素恒)2, Chong Wang(王翀)1, Cheng Ren(任承)1, Yuehua Su(苏跃华)1, and De-Zhong Cao(曹德忠)1,†   

  1. 1 Department of Physics, Yantai University, Yantai 264005, China;
    2 College of Physics Science & Technology, Hebei University, Baoding 071002, China
  • 收稿日期:2025-09-17 修回日期:2025-11-04 接受日期:2025-11-06 发布日期:2026-02-05
  • 通讯作者: De-Zhong Cao E-mail:dzcao@ytu.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 62105278 and 11674273) and the Natural Science Foundation of Shandong Province (Grant No. ZR2023MA015).

Second-order correlated interference with multi-wavelength thermal-light beams

De-Sheng Wang(王德胜)1, Yi-Ning Zhao(赵一宁)1, Lingxin Kong(孔令鑫)1, Su-Heng Zhang(张素恒)2, Chong Wang(王翀)1, Cheng Ren(任承)1, Yuehua Su(苏跃华)1, and De-Zhong Cao(曹德忠)1,†   

  1. 1 Department of Physics, Yantai University, Yantai 264005, China;
    2 College of Physics Science & Technology, Hebei University, Baoding 071002, China
  • Received:2025-09-17 Revised:2025-11-04 Accepted:2025-11-06 Published:2026-02-05
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (Grant Nos. 62105278 and 11674273) and the Natural Science Foundation of Shandong Province (Grant No. ZR2023MA015).

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摘要： A method for correlating thermal light over a wide spectral range is proposed. A multi-wavelength pseudothermal source, prepared by projecting laser beams of multiple wavelengths (650 nm, 635 nm, 532 nm, and 473 nm) onto a moving thin ground glass plate, is employed in a double-slit interference experiment. The ground glass plate induces random phase differences between light beams of different wavelengths passing through it. This initial random phase difference significantly influences the high-order intensity correlation functions of multi-wavelength thermal beams. Experimentally, second-order correlated interference patterns, including subwavelength interference, of pseudothermal beams with different wavelengths are observed in the intensity correlation measurements. This method facilitates applications of correlated thermal photons in quantum information processing and quantum imaging.

关键词: correlated interference, multi-wavelength thermal light, second-order correlation function

Abstract: A method for correlating thermal light over a wide spectral range is proposed. A multi-wavelength pseudothermal source, prepared by projecting laser beams of multiple wavelengths (650 nm, 635 nm, 532 nm, and 473 nm) onto a moving thin ground glass plate, is employed in a double-slit interference experiment. The ground glass plate induces random phase differences between light beams of different wavelengths passing through it. This initial random phase difference significantly influences the high-order intensity correlation functions of multi-wavelength thermal beams. Experimentally, second-order correlated interference patterns, including subwavelength interference, of pseudothermal beams with different wavelengths are observed in the intensity correlation measurements. This method facilitates applications of correlated thermal photons in quantum information processing and quantum imaging.

Key words: correlated interference, multi-wavelength thermal light, second-order correlation function

中图分类号:  (Interference)

  • 42.25.Hz
42.50.St (Nonclassical interferometry, subwavelength lithography)