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http://hdl.handle.net/1783.1/7246
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| Title: | Optical precursor of a single photon |
| Authors: | Zhang, Shanchao
Chen, Jiefei
Liu, Chang
Loy, Michael M.
Wong, George K. L.
Du, Shengwang |
| Keywords: | Direct observation
Dptical precursors
Heralded single photons
Cold atoms
Transparency
Slow-light effect
Single-photon
Delayed main wave packet |
| Issue Date: | 16-Jun-2011 |
| Citation: | Physical review letters, v. 106, 243602 (2011) |
| Abstract: | We report the direct observation of optical precursors of heralded single photons with step- and square-modulated wave packets passing through cold atoms. Using electromagnetically induced transparency and the slow-light effect, we separate the single-photon precursor, which always travels at the speed of light in vacuum, from its delayed main wave packet. In the two-level superluminal medium, our result suggests that the causality holds for a single photon. |
| Rights: | Physical Review Letters © copyright (2010) American Physical Society. The Journal's web site is located at http://prl.aps.org/ |
| URI: | http://hdl.handle.net/1783.1/7246 |
| Appears in Collections: | PHYS Journal/Magazine Articles
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| e243602.pdf | | 627Kb | Adobe PDF | View/Open |
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