Electromagnetically induced angular Talbot effect

Electromagnetically induced angular Talbot effect
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电磁感应角塔尔博特效应

DOI:
10.1088/0953-4075/48/24/245502
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发表时间:
2015-10
期刊:
Journal of Physics B: Atomic, Molecular and Optical Physics
影响因子:
--
通讯作者:
Guojian Yang
Guojian Yang
中科院分区:
其他
文献类型:
--
作者:
Tianhui Qiu;Guojian Yang

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在合适的球形波前照射下,周期性光栅的离散角谱(角塔尔博特效应)最近被观测到(Azaña和Chatellus 2104 Phys)。Rev. Lett. 112 213902)。本文研究了在没有宏观周期结构的介质中实现这种现象的可能性。可调谐电磁感应光栅(EIG)就是这样一种介质。在双Λ-type四能级原子系统中,由于三阶非线性效应产生周期性调制的强磁化率,我们得到了一个基于周期调制强磁化率的EIG,并给出了在满足照明光前的离散相位调制位移的条件下,振幅EIG和混合EIG的角Talbot效应。EIG参数是可调的,基于EIG的角度塔尔博特效应可能具有与周期光栅相同的潜在应用。
The discrete angular spectrum (angular Talbot effect) of a periodic grating illuminated by a suitable spherical wave front has been observed recently (Azaña and Chatellus 2104 Phys. Rev. Lett. 112 213902). In this paper we study the possibility of such a phenomenon being realized with a medium that has no macroperiodic structure itself. Tunable electromagnetically induced grating (EIG) could be such a kind of medium. We obtain an EIG based on the periodically modulated strong susceptibility due to the third-order nonlinear effect generated in a double Λ-type four-level atomic system, and show the angular Talbot effect of an amplitude EIG, as well as a hybrid EIG, as the condition of the discrete phase-modulation shift of the illumination light front is satisfied. EIG parameters are tunable and the EIG-based angular Talbot effect may have the same potential applications as its periodic grating counterpart has.
DOI: 10.1119/1.2768695
发表时间: 2007-08
期刊: The Physics Teacher
影响因子: --
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