Frequency-Multiplexed Complex-Amplitude Meta-Devices Based on Bispectral 2-Bit Coding Meta-Atoms
Rensheng Xie,Minbo Xin,Shiguo Chen,Dajun Zhang,Xiong Wang,Guohua Zhai,Jianjun Gao,Sensong An,Bowen Zheng,Hualiang Zhang,Jun Ding +10 more
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TL;DR: In this article, a reflective 2-bit meta-hologram is proposed to operate with independent complex-amplitude modulations at two frequency bands, where two C-shape split ring resonators are located in the centers of a circular hole and an annular slot.
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Abstract: Meta-devices have attracted great interest due to the unprecedented capabilities of manipulating wavefronts. Complex-amplitude hologram can provide high-quality images that can be free of ghost images and undesired diffraction orders. However, conventional meta-holograms usually operate at a single band with phase-only modulation. Here, a reflective 2-bit meta-hologram is proposed to operate with independent complex-amplitude modulations at two frequency bands. The high-efficiency meta-atom is composed of a top perforated metallic layer, on which two C-shape split ring resonators (CSRRs) are located in the centers of a circular hole and an annular slot. By tuning the sizes of the two CSRRs, dual-band 2-bit phase modulations can be individually achieved, while the amplitude profile can be continuously tailored at each band by rotating the corresponding CSRR without affecting the phase responses. Based on this emerging meta-atom, a dual-band bifocal metalens is demonstrated numerically and a bispectral meta-hologram is validated both numerically and experimentally at two widely used communication bands. The proposed method features all desirable advantages of the coding metasurfaces with extra degrees of freedom by providing independent frequency control and amplitude modulation, which can provide great opportunities in multifunctional applications with enhanced performance and boosted information capacity.
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Citations
Dual-band independent phase control based on high efficiency metasurface [Invited]
TL;DR: A general method to realize arbitrary dual-band independent phase control is proposed and demonstrated in this paper and both simulation and measurement results agree well with the theoretical pre-setting.
Tunable Metasurface With Dynamic Amplitude and Phase Control
Bowen Zheng,Han Ren,Sensong An,Hong Tang,Hang Li,Mohammad Haerinia,Yunxi Dong,Clayton Fowler,Hualiang Zhang +8 more
TL;DR: In this article, a novel tunable metasurface design with the capability to control both amplitude and phase of transmitted wavefront has been designed, simulated, and characterized experimentally.
Non‐Interleaved Polarization‐Frequency Multiplexing Metasurface for Multichannel Holography
TL;DR: In this paper , a non-interleaved polarization-frequency multiplexing metasurface is proposed, which can realize independent controls of orthogonal linearly polarized or circularly polarized waves in two frequency bands to achieve four independent information channels.
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Stereo Meta‐Atom Enabled Phase–Amplitude Gradient Metasurface for Circularly Polarized Waves
TL;DR: In this article , a stereo meta-atom-enabled gradient metasurface that is capable of fully controlling both amplitude and phase for circularly polarized EM waves is proposed and demonstrated.
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Combining Pancharatnam–Berry Phase and Conformal Coding Metasurface for Dual-Band RCS Reduction
TL;DR: In this article , a flexible, dual-broadband, and polarization-insensitive coding metasurface is proposed to manipulate electromagnetic (EM) scattering in microwave frequency band, which can achieve more than 10 dB radar cross section (RCS) reduction in the range of 9.26-12.87 and 14.84-19.35 GHz in planar case, which is attributed to the reorientation of the reflected energies into different directions by optimizing the coding sequence.
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References
Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction
Nanfang Yu,Patrice Genevet,Patrice Genevet,Mikhail A. Kats,Francesco Aieta,Francesco Aieta,Jean-Philippe Tetienne,Jean-Philippe Tetienne,Federico Capasso,Zeno Gaburro,Zeno Gaburro +10 more
TL;DR: In this article, a two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint phase discontinuities on propagating light as it traverses the interface between two media.
8.8K
Flat Optics With Designer Metasurfaces
Nanfang Yu,Federico Capasso +1 more
TL;DR: This Review focuses on recent developments on flat, ultrathin optical components dubbed 'metasurfaces' that produce abrupt changes over the scale of the free-space wavelength in the phase, amplitude and/or polarization of a light beam.
5.6K
Metalenses at visible wavelengths: Diffraction-limited focusing and subwavelength resolution imaging.
Mohammadreza Khorasaninejad,Wei Ting Chen,Robert C. Devlin,Jaewon Oh,Alexander Y. Zhu,Federico Capasso +5 more
TL;DR: The results firmly establish that metalenses can have widespread applications in laser-based microscopy, imaging, and spectroscopy, with image qualities comparable to a state-of-the-art commercial objective.
3.1K
Coding metamaterials, digital metamaterials and programmable metamaterials
TL;DR: Digital metamaterials consisting of two kinds of unit cells whose different phase responses allow them to act as ‘0’ and ‘1’ bits are developed to enable controlled manipulation of electromagnetic waves.
Metasurface holograms reaching 80% efficiency
TL;DR: The design of the hologram integrates a ground metal plane with a geometric metasurface that enhances the conversion efficiency between the two circular polarization states, leading to high diffraction efficiency without complicating the fabrication process.