Reconfigurable Mach–Zehnder interferometer for dynamic modulations of spoof surface plasmon polaritons

Reconfigurable Mach–Zehnder interferometer for dynamic modulations of spoof surface plasmon polaritons
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用于动态调制欺骗表面等离子体激元的可重构马赫曾德尔干涉仪

DOI:
10.1515/nanoph-2021-0539
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发表时间:
2021-01
期刊:
影响因子:
7.5
通讯作者:
Tie Jun Cui
Tie Jun Cui
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Wen Yi Cui;Jingjing Zhang;Xinxin Gao;Tie Jun Cui

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抽象的。我们提出了一种超薄可重构马赫-曾德尔干涉仪(MZI),用于实现欺骗表面等离子体(SSP)信号的动态频率和幅度调制。有源变容二极管集成在 MZI 臂之一的 SSP 单元中,以向 MZI 结构引入不对称性,从而可以通过改变施加在变容二极管上的偏置电压来控制干涉图案。我们表明,多个尖锐干扰谷的频谱位置对二极管电容的变化非常敏感,从而可以实现良好的频率调制。我们还通过在多个选定频率下调节变容二极管来演示连续幅度调制。为了验证所提出的 SSP MZI 的可重构特性,频移键控 (FSK) 和幅度调制已在同一结构上进行了实验演示。通过设计SSP结构的几何参数,可以进一步提高幅度调制的调制深度,在实验中达到了从0.88到0.05的显着幅度变化。
Abstract. We propose an ultrathin reconfigurable Mach–Zehnder interferometer (MZI) for realizing dynamic frequency and amplitude modulations of spoof surface plasmon (SSP) signal. Active varactor diodes are integrated in the SSP unit cells on one of the MZI arms to introduce asymmetry to the MZI structure, which can control the interference patterns by varying bias voltages applied on the varactor diodes. We show that the spectral positions of multiple sharp interference dips are very sensitive to the change of diode capacitance, thereby allowing for good frequency modulation. We also demonstrate continuous amplitude modulation by tuning the varactor diodes at multiple selected frequencies. To verify the reconfigurable feature of the proposed SSP MZI, the frequency shift keying (FSK) and amplitude modulations have been experimentally demonstrated on the same structure. The modulation depth of the amplitude modulation can be further improved by designing geometrical parameters of the SSP structure, reaching a significant amplitude change from 0.88 to 0.05 in experiments.
使用周期性调制欺骗等离子体波导进行连续漏波扫描
DOI: 10.1038/srep29600
发表时间: 2016-07-12
期刊: Scientific reports
影响因子: 4.6
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电容耦合串联欺骗表面等离子体激元
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发表时间: 2016-06-21
期刊: Scientific reports
影响因子: 4.6
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发表时间: 2019-12
影响因子: 6.8
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