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Noise-resistant phase imaging with intensity correlation.

Jerzy Szuniewicz1, Stanisław Kurdziałek1, Sanjukta Kundu1

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This summary is machine-generated.

This study introduces a novel phase imaging technique that overcomes limitations of traditional interferometry by using intensity correlation. This method achieves high interference visibility even with rapid phase fluctuations, enabling sensitive measurements in low-light conditions.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Quantum Imaging

Background:

  • Interferometric methods are crucial for sensitive measurements across various scientific fields.
  • Rapid phase fluctuations and low photon counts limit traditional interferometry's applicability.
  • Existing solutions like shortened measurement times reduce sensitivity in low-light scenarios.

Purpose of the Study:

  • To develop a phase imaging technique immune to time-dependent phase fluctuations.
  • To enable high interference visibility for extended acquisition times, even in low-intensity imaging.
  • To overcome the limitations of traditional interferometry in dynamic or low-light environments.

Main Methods:

  • Introduced a novel phase imaging technique based on intensity correlation.
  • Utilized intensity correlation instead of direct intensity measurements to recover phase information.
  • Proved the method's optimality using the Cramér-Rao bound for low photon count regimes.

Main Results:

  • Achieved high interference visibility irrespective of acquisition time, overcoming phase fluctuations.
  • Demonstrated robustness in extreme low-photon count scenarios (≤2 photons).
  • The technique is effective even with significant time-dependent phase instabilities.

Conclusions:

  • The developed intensity correlation-based phase imaging technique offers a robust solution for phase measurement challenges.
  • This method significantly broadens the applicability of interferometry in demanding conditions.
  • Potential applications include infrared and X-ray imaging, quantum, and matter-wave interferometry.