Coherence-Assisted Resonance with Sub-Transit-Limited Linewidth
Abstract
We demonstrate a novel approach to obtain a resonance linewidth below the transit limit. The cross correlation between the induced intensity modulation of two lasers coupling the target resonance exhibits a narrow spectrum. 1/30 of the transit-limited width is achieved in a proof-of-principle experiment where two ground states are the target resonance levels. Attainable linewidth is only limited by laser shot noise in principle. The experimental results qualitatively agree with an intuitive analytical model and numerical calculations. This technique can be easily implemented and should be applicable to many atomic, molecular, and solid state spin systems for spectroscopy, metrology, and resonance-based sensing and imaging.
Additional Information
© 2012 American Physical Society. Received 25 March 2012; revised 5 November 2012; published 5 December 2012. We thank Vladan Vuletic´, Eugeniy Mikhailov, Saijun Wu, Xiangming Hu, Shengwang Du, Michael Hohensee, Irina Novikova, Shiyao Zhu, Weitao Liu, and Mengzhen Zhang for stimulating discussions. L. F. and P. L. contributed equally to this work. This work was funded by the NBRPC (973 Program Grants No. 2011CB921604 and No. 2012CB921604), the NNSFC (Grant No. 10904018), and Fudan University (Y. X.); by the Sherman Fairchild Foundation and the NBRPC (973 Program Grants No. 2011CBA00300 and No. 2011CBA00301) (L. J.); and by the AI-TF New Faculty Grant and the NSERC Discovery Grant (J.W.).Attached Files
Published - PhysRevLett.109.233006.pdf
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Additional details
- Eprint ID
- 36299
- Resolver ID
- CaltechAUTHORS:20130110-104615277
- 2011CB921604
- NBRPC 973 Program
- 2012CB921604
- NBRPC 973 Program
- 10904018
- NNSFC
- Fudan University
- Sherman Fairchild Foundation
- 2011CBA00300
- NBRPC 973 Program
- 2011CBA00301
- NBRPC 973 Program
- AI-TF New Faculty Grant
- NSERC Discovery Grant
- Created
-
2013-01-10Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field