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Updated: May 15, 2025

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Micro-cavity length stabilization for fluorescence enhancement using schemes based on higher-order spatial modes.

Abdullah Shehata Abdelatief1,2, Antonius J Renders1, Mohammed K Alqedra1,3

  • 1Department of Physics, Lund University, P.O. Box 118, SE-22100 Lund, Sweden.

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Summary
This summary is machine-generated.

We developed a new method for stabilizing micro-cavity length using higher-order spatial modes. This technique significantly reduces stray photons, improving performance for quantum technologies.

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Area of Science:

  • Optics and Photonics
  • Quantum Technology
  • Cavity Quantum Electrodynamics

Background:

  • Micro-cavities are crucial for sensitive fluorescence detection.
  • Stabilizing micro-cavity length is challenging but essential for performance.
  • Minimizing photon leakage from stabilization beams is critical for few-emitter systems.

Purpose of the Study:

  • To investigate high-performance cavity length stabilization using odd-indexed higher-order spatial modes.
  • To design and construct a micro-cavity setup with tunable high passive stability.
  • To implement and characterize active stabilization techniques based on higher-order modes.

Main Methods:

  • Experimental investigation of cavity length stabilization.
  • Design and construction of a micro-cavity assembly.
  • Implementation and characterization of active stabilization techniques using higher-order modes.

Main Results:

  • Achieved cavity length stability of approximately 0.5 picometers root-mean-square.
  • Suppressed error photons leaking from the stabilization beam by over 100-fold.
  • Demonstrated the effectiveness of higher-order modes for micro-cavity stabilization.

Conclusions:

  • The developed technique offers high-performance cavity length stabilization.
  • This method is suitable for micro-cavities used in quantum technology applications.
  • Reduced photon leakage enhances the sensitivity of fluorescence detection systems.