Broadband one-way propagation and rainbow trapping of terahertz radiations

Jie Xu, Sanshui Xiao, Chiaho Wu, Hang Zhang*, Xiaohua Deng, Linfang Shen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Surface magnetoplasmon (SMP) supported at an interface between magnetized plasmonic and dielectric materials has been widely explored; however, it suffers with narrow bandwidth for one-way propagation. Here we propose a novel metal-semiconductor-dielectricmetal (MSDM) structure showing the large bandwidth for the complete one-way propagation (COWP). Because of the compression of the zone for two-way propagating modes in the semiconductor layer by reducing semiconductor thickness, the bandwidth is significantly increased by several times. More importantly, in such MSDM structure, the SMP dispersion can be engineered by controlling the semiconductor thickness, and based on this, slowing wave and trapping rainbow can be realized in a tapered system at terahertz frequencies.
Original languageEnglish
Article number10659
JournalOptics Express
Volume27
Issue number8
Number of pages11
ISSN1094-4087
DOIs
Publication statusPublished - 2019

Cite this

Xu, Jie ; Xiao, Sanshui ; Wu, Chiaho ; Zhang, Hang ; Deng, Xiaohua ; Shen, Linfang. / Broadband one-way propagation and rainbow trapping of terahertz radiations. In: Optics Express. 2019 ; Vol. 27, No. 8.
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abstract = "Surface magnetoplasmon (SMP) supported at an interface between magnetized plasmonic and dielectric materials has been widely explored; however, it suffers with narrow bandwidth for one-way propagation. Here we propose a novel metal-semiconductor-dielectricmetal (MSDM) structure showing the large bandwidth for the complete one-way propagation (COWP). Because of the compression of the zone for two-way propagating modes in the semiconductor layer by reducing semiconductor thickness, the bandwidth is significantly increased by several times. More importantly, in such MSDM structure, the SMP dispersion can be engineered by controlling the semiconductor thickness, and based on this, slowing wave and trapping rainbow can be realized in a tapered system at terahertz frequencies.",
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Broadband one-way propagation and rainbow trapping of terahertz radiations. / Xu, Jie; Xiao, Sanshui ; Wu, Chiaho; Zhang, Hang; Deng, Xiaohua; Shen, Linfang.

In: Optics Express, Vol. 27, No. 8, 10659, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

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AU - Xu, Jie

AU - Xiao, Sanshui

AU - Wu, Chiaho

AU - Zhang, Hang

AU - Deng, Xiaohua

AU - Shen, Linfang

PY - 2019

Y1 - 2019

N2 - Surface magnetoplasmon (SMP) supported at an interface between magnetized plasmonic and dielectric materials has been widely explored; however, it suffers with narrow bandwidth for one-way propagation. Here we propose a novel metal-semiconductor-dielectricmetal (MSDM) structure showing the large bandwidth for the complete one-way propagation (COWP). Because of the compression of the zone for two-way propagating modes in the semiconductor layer by reducing semiconductor thickness, the bandwidth is significantly increased by several times. More importantly, in such MSDM structure, the SMP dispersion can be engineered by controlling the semiconductor thickness, and based on this, slowing wave and trapping rainbow can be realized in a tapered system at terahertz frequencies.

AB - Surface magnetoplasmon (SMP) supported at an interface between magnetized plasmonic and dielectric materials has been widely explored; however, it suffers with narrow bandwidth for one-way propagation. Here we propose a novel metal-semiconductor-dielectricmetal (MSDM) structure showing the large bandwidth for the complete one-way propagation (COWP). Because of the compression of the zone for two-way propagating modes in the semiconductor layer by reducing semiconductor thickness, the bandwidth is significantly increased by several times. More importantly, in such MSDM structure, the SMP dispersion can be engineered by controlling the semiconductor thickness, and based on this, slowing wave and trapping rainbow can be realized in a tapered system at terahertz frequencies.

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