Detector of UV light chirality based on a diamond metasurface

Circularly polarized light (CPL) finds diverse applications in fields such as quantum communications, quantum computing, circular dichroism (CD) spectroscopy, polarization imaging, and sensing. However, conventional techniques for detecting CPL face challenges related to equipment miniaturization, s...

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Veröffentlicht in:Optics express 2023-10, Vol.31 (21), p.34252-34263
Hauptverfasser: Feng, Jiajing, Liang, Zhongzhu, Shi, Xiaoyan, Dong, Yongjun, Yang, Fuming, Zhang, Xiqing, Dai, Rui, Jia, Yan, Liu, Hua, Li, Sixuan
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container_end_page 34263
container_issue 21
container_start_page 34252
container_title Optics express
container_volume 31
creator Feng, Jiajing
Liang, Zhongzhu
Shi, Xiaoyan
Dong, Yongjun
Yang, Fuming
Zhang, Xiqing
Dai, Rui
Jia, Yan
Liu, Hua
Li, Sixuan
description Circularly polarized light (CPL) finds diverse applications in fields such as quantum communications, quantum computing, circular dichroism (CD) spectroscopy, polarization imaging, and sensing. However, conventional techniques for detecting CPL face challenges related to equipment miniaturization, system integration, and high-speed operation. In this study, we propose a novel design that addresses these limitations by employing a quarter waveplate constructed from a diamond metasurface, in combination with a linear polarizer crafted from metallic aluminum. The diamond array, with specific dimensions (a = 84 nm, b = 52 nm), effectively transforms left-handed and right-handed circularly polarized light into two orthogonally linearly polarized beams who have a polarization degree of approximately 0.9. The aluminum linear polarizer then selectively permits the transmission of these transformed linearly polarized beams.Our proposed design showcases remarkable circular dichroism performance at a wavelength of 280 nm, concurrently maintaining high transmittance and achieving a substantial extinction ratio of 25. Notably, the design attains an ultraviolet wavelength transmission efficiency surpassing 80%. Moreover, our design incorporates a rotation mechanism that enables the differentiation of linearly polarized light and singly circularly polarized light. In essence, this innovative design introduces a fresh paradigm for ultraviolet circularly polarized light detection, offering invaluable insights and references for applications in polarization detection, imaging, biomedical diagnostics, and circular dichroic spectroscopy.
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title Detector of UV light chirality based on a diamond metasurface
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