Results 31 to 40 of about 1,369 (178)
High numerical aperture metalens to generate an energy backflow
Компьютерная оптика, 2020 Using electronic beam lithography and reactive ion beam etching, a metalens is manufactured in a thin layer of amorphous silicon of a 130-nm depth, a 30-µm diameter, and a 633-nm focal length (equal to the illumination wavelength).
V.V. Kotlyar +3 more
doaj +1 more source
Designing high-efficiency extended depth-of-focus metalens via topology-shape optimization
Nanophotonics, 2022 Longitudinal optical field modulation is of critical importance in a wide range of applications, including optical imaging, spectroscopy, and optical manipulation.
Zheng Yuhan +8 more
doaj +1 more source
Specialized directional beaming through a metalens and a typical application
Nanophotonics, 2018 The anomalous beaming effect of the periodic metallic corrugations functioning as a special case of kSP=2π/Λ is discussed and verified by means of both theoretical calculation and experimental probing.
Zhao Kangyi +3 more
doaj +1 more source
Inverse design of sub-diffraction focusing metalens by adjoint-based topology optimization
New Journal of Physics, 2023 Breaking the diffraction limit to realize imaging at the nanoscale is challenging in scientific research. Traditional sub-diffraction focusing metalens is obtained by arranging artificially selected unit cells, of which the design process is passive and ...
Lianhong Dong +7 more
doaj +1 more source
Design of Polarization-Independent Reflective Metalens in the Ultraviolet–Visible Wavelength Region
Nanomaterials, 2021 Flat lens or metalens, as one of the most important application branches of metasurfaces, has recently been attracting significant research interest. Various reflective and transmissive metalenses have been demonstrated in the terathertz, infrared and ...
Huifang Guo +6 more
doaj +1 more source
Vacuum ultraviolet nonlinear metalens
Science Advances, 2022 Vacuum ultraviolet (VUV) light plays an essential role across science and technology, from molecular spectroscopy to nanolithography and biomedical procedures. Realizing nanoscale devices for VUV light generation and control is critical for next-generation VUV sources and systems, but the scarcity of low-loss VUV materials creates a substantial ...
Ming Lun Tseng +13 more
openaire +2 more sources
High-efficiency broadband achromatic metalens for near-IR biological imaging window
Nature Communications, 2021 Though broadband achromatic metalens are attractive for biological applications, existing metalenses show limited performance in the biological imaging window.
Yujie Wang +10 more
doaj +1 more source
Broadband Achromatic Metalens in the Long-Wave Infrared Regime
IEEE Photonics Journal, 2023 Compared with conventional lenses, metalenses can offer smaller form factor, light weight and new functionality, and have become the focus of the recent investigations of metasurface.
Yongjian Zheng +6 more
doaj +1 more source
High-Efficiency Achromatic Metalens Topologically Optimized in the Visible
Nanomaterials, 2023 Metalens, composed of arrays of nano-posts, is an ultrathin planar optical element used for constructing compact optical systems which can achieve high-performance optical imaging by wavefront modulating.
Lijuan Zhang +5 more
doaj +1 more source
Recent Advances in Programmable Metasurfaces and Meta‐Devices
Advanced Electronic Materials, EarlyView.Programmable metasurfaces enable various novel functionalities by dynamically tuning electromagnetic wavefronts. This article provides a comprehensive review of recent advances in microwave and terahertz programmable metasurfaces, covering electrical, thermal, optical, and mechanical control mechanisms.
Linda Shao +4 more
wiley +1 more source