Results 171 to 180 of about 2,375 (203)
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Transmission optimized LWIR metalens
Applied Optics, 2022Thermal imaging at the infrared wavelength regime has long been applied to different areas such as agriculture and defense industries. Metasurfaces, 2D engineered ultra-thin structures, have attracted much attention due to their compact size, superior performance, and different functionalities at optical frequencies.
Halil Can Nalbant +4 more
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Ultrahigh Numerical Aperture Metalens at Visible Wavelengths [PDF]
Nano Letters, 2018 Subwavelength imaging requires the use of high numerical aperture (NA) lenses together with immersion liquids in order to achieve the highest possible resolution.
Haowen Liang +2 more
exaly +2 more sources
European Journal of Physics, 2022
Abstract A metalens is an ultra-thin lens made of a metasurface, with focusing and imaging functions, and with promising applications in miniature optical systems, such as mobile devices. This paper gives an introduction to the optics of metalenses. First, we examine the focusing and imaging characteristics of metalenses. And then, as an
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Abstract A metalens is an ultra-thin lens made of a metasurface, with focusing and imaging functions, and with promising applications in miniature optical systems, such as mobile devices. This paper gives an introduction to the optics of metalenses. First, we examine the focusing and imaging characteristics of metalenses. And then, as an
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Optik, 2021
Abstract Recently, metasurfaces are widely applied in different fields and emerge as a versatile platform for wavefront shaping. For further application, tunable metasurface devices are highly desired. Here, a deflectable focusing metalens based on Moire structure is proposed.
Tian Zhou, Bin Hu, Zheng Liu, Juan Liu
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Abstract Recently, metasurfaces are widely applied in different fields and emerge as a versatile platform for wavefront shaping. For further application, tunable metasurface devices are highly desired. Here, a deflectable focusing metalens based on Moire structure is proposed.
Tian Zhou, Bin Hu, Zheng Liu, Juan Liu
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Optical Technologies for Telecommunications 2020, 2021
Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey S. Stafeev +4 more
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Using electronic beam lithography and ion etching we manufactured a metalens with diameter 30 μm, focal length 633 nm and relief depth of 130 nm. The metalens consists from 16 sector subwavelength binary gratings with period 220 nm. The proposed metalens generates a left-hand circularly polarized optical vortex with topological charge 2 when it is ...
Sergey S. Stafeev +4 more
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A broadband achromatic metalens in the visible
Nature Nanotechnology, 2018Metalenses consist of an array of optical nanoantennas on a surface capable of manipulating the properties of an incoming light wavefront. Various flat optical components, such as polarizers, optical imaging encoders, tunable phase modulators and a retroreflector, have been demonstrated using a metalens design. An open issue, especially problematic for
Shuming, Wang +15 more
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Metalens based on constructive interference
Applied Optics, 2019A metalens consisting of nanometer rectangular holes etched on silver film is proposed, and the focusing effect is actualized in the visible region. The rectangular holes are arranged on concentric circles, and the fields excited by these holes constructively interfere due to having the same propagation phase.
Lixia Liu +5 more
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A Broadband Achromatic Metalens
Frontiers in Optics / Laser Science, 2018Metalens significantly suffers from chromatic aberration issue, which limits its applications on color images. Here we demonstrate the first broadband achromatic metalens in visible wavelength based on the concept of integrated-resonant unit elements (IRUEs).
Yi-Teng Huang +12 more
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Optical Manipulation Conference, 2018
Here we demonstrated a GaN metalens array to project a light spots array which can be a light shape generator in the structure light applications. The advantages of this metadevice is light weight, small, ultrathin, durable and easy to compact with other device. The light spot size is a function with the distance of detector.
Din Ping K. Tsai +9 more
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Here we demonstrated a GaN metalens array to project a light spots array which can be a light shape generator in the structure light applications. The advantages of this metadevice is light weight, small, ultrathin, durable and easy to compact with other device. The light spot size is a function with the distance of detector.
Din Ping K. Tsai +9 more
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A broadband achromatic Alvarez metalens
Optics & Laser Technology, 2022Xiaoyu Che +3 more
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