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Related Experiment Videos

Metastability transfer spectroscopy with two like ions in the same trap.

H Dehmelt1, W Nagourney

  • 1Department of Physics, FM-15, University of Washington, Seattle, WA 98195.

Proceedings of the National Academy of Sciences of the United States of America
|October 1, 1988
PubMed
Summary

Researchers propose using a second trapped ion as an ultrasharp light source to overcome limitations in high-resolution optical spectroscopy. This method involves exciting one barium ion and observing excitation transfer to a second ion for precise measurements.

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Area of Science:

  • Atomic Physics
  • Quantum Optics
  • Spectroscopy

Background:

  • High-resolution optical spectroscopy of individual trapped ions is limited by the spectral linewidth of available lasers.
  • Developing ultrasharp light sources is crucial for advancing precision measurements in atomic physics.

Purpose of the Study:

  • To investigate the use of a metastable excited ion as an ultrasharp light source for spectroscopy.
  • To demonstrate resonant excitation transfer between two closely spaced barium ions.

Main Methods:

  • Laser-cooling of two barium ions to a distance of approximately 8 micrometers.
  • Exciting one ion (A) to a metastable D(5/2) level, rendering it invisible.
  • Observing excitation transfer to the second ion (B) by tuning ion separation and applying electric fields.

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Main Results:

  • Proposed method to use excitation transfer between barium ions as an ultrasharp light source.
  • Calculated absorption cross-section for excitation transfer.
  • Potential to achieve a resonant transfer response as sharp as 11 mHz (Q ~ 0.4 x 10^17).

Conclusions:

  • A two-ion system can serve as a highly precise, ultrasharp light source.
  • This technique offers a novel approach to overcome laser linewidth limitations in spectroscopy.
  • The proposed method has potential for significant advancements in precision atomic measurements.