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Full-Stokes metasurface polarimetry requiring only a single measurement
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作者 CHENGLONG ZHENG HUI LI +4 位作者 JINGYU LIU mengguang wang HUAPING ZANG YAN ZHANG JIANQUAN YAO 《Photonics Research》 SCIE EI CAS CSCD 2024年第3期514-521,共8页
Polarization is crucial in various fields such as imaging,sensing,and substance detection.A compact,fast,and accurate polarization detection device is vital for these applications.Herein,we demonstrate a multifocus me... Polarization is crucial in various fields such as imaging,sensing,and substance detection.A compact,fast,and accurate polarization detection device is vital for these applications.Herein,we demonstrate a multifocus metalens for terahertz polarization detection that requires only a single measurement to obtain complete polarization parameters and reconstruct the polarization state of the incident field.The individual subarrays of this metalens convert each of the six polarized components into the same polarization,which in turn links the Stokes parameters to these six foci.The incident linear polarizations and elliptical polarizations are characterized by Stokes parameters and polarization ellipses.Simulations and experimental results show that the scheme can accurately detect the incident polarization with a single measurement.The proposed metasurface polarimetry may find applications in the fields of real-time terahertz detection and integrated optics. 展开更多
关键词 FIELD INCIDENT POLAR
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Terahertz metasurface polarization detection employing vortex pattern recognition
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作者 CHENGLONG ZHENG JINGYU LIU +4 位作者 HUI LI mengguang wang HUAPING ZANG YAN ZHANG JIANQUAN YAO 《Photonics Research》 SCIE EI CAS CSCD 2023年第12期2256-2263,共8页
The manipulation and detection of polarization states play a crucial role in the application of 6G terahertz communication.Nonetheless,the development of compact and versatile polarization detection devices capable of... The manipulation and detection of polarization states play a crucial role in the application of 6G terahertz communication.Nonetheless,the development of compact and versatile polarization detection devices capable of detecting arbitrary polarizations continues to be a challenging endeavor.Here,we demonstrate a terahertz polarization detection scheme by performing mode purity analysis and multidimensional analysis of the transmitted vortex field.The power of the proposed polarization recognition is verified by using three polarization trajectories,including linear polarizations,circular polarizations,and elliptical polarizations.Using the reconstructed complete polarization parameters,the detected polarization states are characterized using polarization ellipses,Poincarésphere,and full-Stokes parameters.The experimental results validate the power of this scheme in polarization detection.This scheme holds promise for applications in polarization imaging and terahertz communication. 展开更多
关键词 POLARIZATION SCHEME PATTERN
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Generation of single-focus phase singularity by the annulusquadrangle-element coded binary square spiral zone plates
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作者 Huaping Zang Zhuanglei Miao +8 位作者 mengguang wang Quanping Fan Lai Wei Chuanke wang Weimin Zhou Yilei Hua Leifeng Cao Xinlian Xue Haizhong Guo 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2022年第9期72-78,共7页
Optical vortices(OVs) with unique square symmetry are widely used in various applications including particle manipulation,microscopy, and image processing. However, the undesired higher-order foci introduced by the co... Optical vortices(OVs) with unique square symmetry are widely used in various applications including particle manipulation,microscopy, and image processing. However, the undesired higher-order foci introduced by the conventional vortex lens such as square spiral zone plates(SSZPs) may lead to additional artifacts and thus degrade contrast sensitivity. In this endeavor, herein,we propose a methodology to combine the merit of SSZPs and the advantage of Gabor zone plates(GZPs) in establishing a specific single optical element, termed binary single focused square spiral zone plates(BSSZPs). In contrast to the abrupt transitions of the SSZPs, our central idea aims to realize the sinusoidal transmittance along the radial direction of SSZPs by a series of randomly distributed annulus-quadrangle-shaped nanometer structure apertures. The innovative design can simultaneously generate OVs with unique square symmetry, and eliminate the interference of higher-order foci along the propagation direction. Guided by our theoretical predication, the focusing property of such optics was further experimentally demonstrated.These findings are expected to direct new avenue towards improving the performance of optical image processing and alignment system. 展开更多
关键词 optical vortices higher-order diffraction spiral zone plates topological charges
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