Vanadium dioxide-assisted multifunctional terahertz devices platform: modulator, polarization converter, and biosensor

IF 1.1 4区工程技术 Q4 OPTICS

Optical Engineering Pub Date : 2023-11-07 DOI:10.1117/1.oe.62.11.117101

Yonggang Zhang, Xin Cao, Haiyun Yao, Zhongjun Tian, Lanju Liang, Xin Yan, ChengCheng Huang, Fu Qiu, Rui Zhang, Wei Liu, Xiaofei Hu, Zhenhua Li, Ziqun Wang

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引用次数: 0

Abstract

Abstract. Exploiting the phase transition of vanadium dioxide (VO2), a switchable terahertz multifunctional device integrating narrowband absorption and broadband polarization switching was proposed in our study. The transformation of VO2 from insulating state to metallic state can realize different functions. When VO2 was in metal state, the metamaterial device exhibited an absorption effect exceeding 90% in the range of 1.96 to 4.06 THz, and its amplitude was tunable via changing the conductivity of VO2. Further, the modulation depth reached 171%. This device was also used as a broadband cross-polarization converter, achieving more than 97% cross-polarization conversion in the range of 2.03 to 3.93 THz. When VO2 was in insulating state, a narrow-band absorption peak with an absorption rate exceeding 94% was obtained, and the device can be used as a biosensor with a sensitivity of 363 GHz/RIU. The designed THz metamaterials have broad application prospects in modulation, sensing, radar communication, and other fields.

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二氧化钒辅助的多功能太赫兹器件平台:调制器、偏振变换器和生物传感器

利用二氧化钒(VO2)的相变特性，提出了一种集窄带吸收和宽带极化开关于一体的可切换太赫兹多功能器件。VO2由绝缘态转变为金属态可以实现不同的功能。当VO2处于金属态时，该超材料器件在1.96 ~ 4.06 THz范围内具有超过90%的吸收效应，且其振幅可通过改变VO2的电导率来调节。调制深度达到171%。该器件还用作宽带交叉极化变换器，在2.03 ~ 3.93 THz范围内实现了97%以上的交叉极化转换。当VO2处于绝缘状态时，获得了吸收率超过94%的窄带吸收峰，该器件可作为灵敏度为363 GHz/RIU的生物传感器。所设计的太赫兹超材料在调制、传感、雷达通信等领域具有广阔的应用前景。

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来源期刊

Optical Engineering 工程技术-光学

CiteScore

2.70

自引率

7.70%

发文量

393

审稿时长

2.6 months

期刊介绍： Optical Engineering publishes peer-reviewed papers reporting on research and development in optical science and engineering and the practical applications of known optical science, engineering, and technology.