Simulation of Fresnel Zone Plate Imaging Performance with Number of Zones [PDF]
Sensors, 2020 In recent years, integral imaging, a promising three-dimensional imaging technology, has attracted more and more attention for its broad applications in robotics, computational vision, and medical diagnostics. In the visible spectrum, an integral imaging
Ying Li +2 more
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Silicon Fresnel Zone Plate Metalens with Subwavelength Gratings [PDF]
Sensors, 2023 Metalenses are planar optical components that have demonstrated immense potential for integrated optics. In particular, they are capable of high-efficiency subwavelength focusing without the bulkiness of traditional lenses.
William Fraser, Winnie N. Ye
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Polarization-Independent Metasurface Lens Based on Binary Phase Fresnel Zone Plate [PDF]
Nanomaterials, 2020 Based on the binary phase Fresnel zone plate (FZP), a polarization-independent metasurface lens that is able to focus incident light with any polarization state, including circular, linear, and elliptical polarizations, has been proposed and investigated.
Xing Li, Jing Tang, Jonathan Baine
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Study of the Off-Axis Fresnel Zone Plate of a Microscopic Tomographic Aberration [PDF]
Sensors, 2022 A tomographic microscopy system can achieve instantaneous three-dimensional imaging, and this type of microscopy system has been widely used in the study of biological samples; however, existing chromatographic microscopes based on off-axis Fresnel zone ...
Lin Yang +11 more
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Dual-band and dual-polarized reflective Fresnel zone plate design based on Fractal shape [PDF]
Scientific Reports, 2023 In this study, a dual-polarized and dual band reflective Fresnel zone plate with reconfigurable beam is proposed on the basis of fractal frequency selective surface (FSS) unit with nearly 360° phase tunability.
Lusong Wei +6 more
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An Annular Fresnel Zone Plate without Central Spots Fabricated by Femtosecond Laser Direct Writing [PDF]
Micromachines, 2022 In recent years, micro-annular beams have been widely used, which has expanded the possibilities for laser processing. However, the current method of generating an annular beam still has shortcomings, such as spot energy at the center of the produced ...
Xiaoyan Sun, Fang Zhou, Lian Duan
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Bifocal Ultrasound Focusing Using Bi-Fresnel Zone Plate Lenses [PDF]
Sensors, 2020 In this work, we present a bifocal Fresnel zone plate (BiFZP) capable of generating focusing profiles with two different foci. The performance of the BiFZP is demonstrated in the ultrasound domain, with a very good agreement between the experimental ...
Sergio Pérez-López +5 more
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Electrically switchable continuous phase liquid crystal Fresnel zone plate [PDF]
Light: Science & ApplicationsWe present the design, fabrication, and characterization of continuous phase Fresnel zone plates (FZPs) using two-photon polymerization direct laser writing in a polymerizable nematic liquid crystal (LC) confined between glass substrates.
Zhiyu Xu +8 more
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Experimental investigation of a near-field focusing performance of the IP-Dip polymer based 2D and 3D Fresnel zone plate geometries fabricated using 3D laser lithography coated with hyperbolic dispersion surface layered metamaterial [PDF]
Nanophotonics, 2023 Herein we investigate the character of the near-field emission of a two- (2D) and novel three-dimensional (3D) probe geometries fabricated using 3D direct laser writing lithography.
Micek Patrik +5 more
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Enhanced Terahertz Sensing via On-Chip Integration of Diffractive Optics with InGaAs Bow-Tie Detectors [PDF]
SensorsThe practical implementation of terahertz (THz) imaging and spectroscopic systems in real operational conditions requires them to be of a compact size, to have enhanced functionality, and to be user-friendly.
Karolis Redeckas +5 more
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