Results 61 to 70 of about 8,903 (251)
Advanced Science, EarlyView.Designed and demonstrated a flexible metamaterial absorber via loss engineering for large‐area ultra‐broadband infrared extinction, providing a new method for miniaturization of absorbers and flexible optical devices. ABSTRACT The advancement of compact and wearable optical systems is critically limited by the lack of high‐performance, integrable ...
Zhe Wu +11 more
wiley +1 more source
Hybrid Two-Dimensional Subwavelength Surface-Relief Grating–Mesh Structures
, 1996 The homogeneous behavior of periodic two-dimensional subwavelength surface-relief structures that contain both gratings and meshes (inverse gratings) are investigated.
Moharam, M. G., Grann, Eric B.
core +2 more sources
Retrieval of Effective Parameters of Subwavelength Periodic Photonic Structures [PDF]
, 2014 We revisit the standard Nicolson–Ross–Weir method of effective permittivity and permeability restoration of photonic structures for the case of subwavelength metal-dielectric multilayers.
Elizaveta A. Yankovskaya +17 more
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Tunable High‐Performance Metamaterial Filters Based on Novel SRR Architectures
Advanced Science, EarlyView.Based on two novel SRR configurations and two independent SRR integration approaches, four tunable bandpass metamaterial filters were fabricated with an ultra‐thin ceramic substrate. Among them, SM‐2 achieves over 97% electromagnetic wave transmittance, with a minimal 1.15% deviation in its resonant frequency prediction, making them promising ...
Lingxi Qu +4 more
wiley +1 more source
Metasurface‐Enabled Active‐Like Passive Radar
Advanced Science, EarlyView.A programmable space‐time‐coding metasurface embeds distinct spatiotemporal tags into ambient wireless signals, allowing passive radar to operate in an active‐like manner. By enabling code‐correlated reconstruction under interference, the approach supports robust real‐time UAV tracking in complex environments and points to intelligent, low‐power ...
Mingyi Li +7 more
wiley +1 more source
Advanced Science, EarlyView.We investigate the geometry‐governed optoelectronic anisotropy arising from dielectric confinement in quasi‐1D γ‐GaS nanoribbons with intrinsically isotropic atomic structures. Dielectric mismatch between the nanoribbon and its surroundings leads to a general polarization‐dependent photoresponse during near‐field scattering.
Jiawei Jing +16 more
wiley +1 more source
Wide angle boundary models for periodic structures with subwavelength periods
, 2016 For peridic structures with subwavelength periods, wide-angle boundary models are developed by matching the reflection and transmission coefficients for incident waves with different incident angles.
Ya Yan Lu; City University of Hong Kong
core
Subwavelength-sized plasmonic structures for high-resolution optical imaging
, 2012 Optics does not naturally suit the nanometer world because the optical length scale is on the order of several hundred nanometers due to diffraction limit.
Wang, Qian
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TRIM: Simultaneous Thermometry, Ranging, and Imaging via a Monolithic Metalens
Advanced Science, EarlyView.ABSTRACT While metasurfaces offer a pathway beyond the discrete architectures of conventional LWIR systems, physically fusing high‐precision thermometry and passive ranging onto a single metalens remains a formidable challenge. Here, we demonstrate a monolithic, dual‐focus metalens capable of simultaneous multidimensional sensing.
Man Yuan +10 more
wiley +1 more source
Subwavelength structures for Silicon-On-Insulator waveguide Crossing
, 2014 In this thesis, we try to design a low-loss, low- crosstalk and compact dimension waveguide crossing structure with subwavelength grating structures. 1.We discuss the theory and the application limits of subwavelength grating (SWG) structures.
Chi, Chun-ting
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