Issue |
EPL
Volume 99, Number 3, August 2012
|
|
---|---|---|
Article Number | 34003 | |
Number of page(s) | 5 | |
Section | Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics | |
DOI | https://doi.org/10.1209/0295-5075/99/34003 | |
Published online | 09 August 2012 |
Identifying the orbital angular momentum of light based on atomic ensembles
1 Department of Applied Physics, Xi'an Jiaotong University - Xi'an 710049, China
2 School of Science, Xi'an Shiyou University - Xi'an 710065, China
(a) zhangpei@mail.ustc.edu.cn
(b) honggao@mail.xjtu.edu.cn
Received: 13 March 2012
Accepted: 9 July 2012
We propose a scheme to distinguish the orbital-angular-momentum state of the Laguerre-Gaussian (LG) beam based on the electromagnetically induced transparency modulated by a microwave field in atomic ensembles. We show that the transverse-phase variation of a probe beam with the LG mode can be mapped into the spatial intensity distribution due to the change of atomic coherence caused by the microwave. The proposal may provide a useful tool for studying higher-dimensional quantum information based on atomic ensembles.
PACS: 42.50.Gy – Effects of atomic coherence on propagation, absorption, and amplification of light; electromagnetically induced transparency and absorption / 42.25.Kb – Coherence / 33.20.Bx – Radio-frequency and microwave spectra
© EPLA, 2012
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