Microwave induced phase grating in molecular magnets via cross phase modulation

Microwave induced phase grating in molecular magnets via cross phase modulation
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通过交叉相位调制在分子磁体中产生微波感应相位光栅

DOI:
10.1016/j.jmmm.2020.166609
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发表时间:
2020-06
影响因子:
2.7
通讯作者:
Xiaotao Xie
Xiaotao Xie
中科院分区:
材料科学3区
文献类型:
--
作者:
Jibing Liu;Na Liu;Tangkun Liu;Chuanjia Shan;Hong Li;Anshou Zheng;Xiaotao Xie

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本文主要研究分子磁体晶体中微波感应位相光栅的形成。首先,我们计算了分子磁体在直流磁场作用下的能量分裂,结果表明,直流磁场的频率依赖关系在微波频率范围内。其次,分子磁体受到两个强控制磁场(驻波场和泵浦磁场)的影响。当频率在微波范围内的弱探测磁场进入晶体时,这两个控制磁场将改变弱磁场的传输和反射特性。该系统实现了对微弱探头磁场的高透过率和大的位相漂移,形成了微波位相光栅。在适当的参数条件下,微波位相光栅的一阶衍射效率达到31%,接近理想的正弦位相光栅。通过调节控制场强度、相互作用长度L和单光子失谐,可以有效地调节光栅的衍射效率。第三,讨论了多普勒效应对微波位相光栅的影响。
In this paper, we focus on the forming microwave induced phase grating (MIPG) in a crystal of molecular magnets. Firstly, we calculate the energy split of molecular magnet in the present of dc magnetic filed, and the results show that the frequencies dependence of the dc magnetic field are in the microwave frequency range. Secondly, the molecular magnet is subject two strong control magnetic fields (standing wave field and pump magnetic field). When a weak probe magnetic field with the frequency in the microwave range enters the crystal, the two control magnetic fields will modify the transmission and reflection properties of weak magnetic field. The system achieves high transmissivity and a big phase excursion for the weak probe magnetic field and form a microwave phase grating. Under proper parameters condition, the first-order diffraction efficiency of the microwave phase grating reaches 31%, which is close to an ideal sinusoidal phase grating. And the diffraction efficiency of the grating can be adjusted efficiently by tuning the control field intensity, interaction length L and the single photon detuning. Thirdly, we also discuss the effect of Dopper effect on the microwave phase grating.
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