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arXiv 2004.13968physics.optics
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电磁感应光栅中多波混频引起的非线性效应

Multi-wave-mixing-induced nonlinear effects in an electromagnetically induced grating

Bibhas Kumar Dutta, Pradipta panchadhyayee, Indranil Bayal, Nityananda Das, Prasanta Kumar Mahapatra

摘要:

我们提出了一个多场耦合原子模型,表现出可控的$symmetric$和$asymmetric$的演化显着增强衍射峰在远场制度的光原子光栅。这些结果是通过在封闭的四能级原子系统中,由于多波混频引起的空间调制相干性的改变,衍射峰强度的线性和非线性调制而得到的。新颖的结果在于预测超对称排列的衍射峰由于占主导地位的振幅部分的光栅传递函数在精确的原子场共振的条件下,这是唯一的本模型。本方案的有效性在于将其应用于四波混频诱导的空间调制相干效应控制产生非线性光。这项工作也发现它的重要性,其在高精度原子光刻领域的适用性。

英文摘要:

We propose a multi-field-coupled atomic model that exhibits controllable $symmetric$ and $asymmetric$ evolution of significantly enhanced diffraction peaks in an opto-atomic grating at far-field regime. Such results are obtained by the linear and nonlinear modulation of the intensities of the diffraction peaks as a result of multi-wave-mixing-induced modification of spatially modulated coherence in a closed four-level atomic system. Novelty of the results lies in predicting super symmetric alignment of the diffraction peaks due to the dominance of the amplitude part of the grating-transfer-function at the condition of exact atom-field resonance, which is unique to the present model. Efficacy of the present scheme is to apply it in producing nonlinear light generated by four-wave-mixing-induced control of spatially modulated coherence effect. The work also finds its importance for its applicability in the field of high-precision atomic lithography.

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