Results 31 to 40 of about 76,246 (267)
Optical Anapole Metamaterial [PDF]
ACS Nano, 2018 The toroidal dipole is a localized electromagnetic excitation independent from the familiar magnetic and electric dipoles. It corresponds to currents flowing along minor loops of a torus. Interference of radiating induced toroidal and electric dipoles leads to anapole, a nonradiating charge-current configuration.
Pin Chieh Wu +10 more
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Multiband terahertz metamaterial perfect absorber for microorganisms detection
Scientific Reports, 2023 We report a multi-resonant terahertz (THz) metamaterial perfect absorber (MPA)-based biosensor in the working frequency range of $$0 - 3.8 THz$$ 0 - 3.8 T H z for sensing of microorganisms (such as fungi, yeast) and wheat pesticides. Nearly $$100\%$$ 100
Ruchi Bhati, Anil K Malik
doaj +1 more source
Reconfigurable Photonic Metamaterials [PDF]
Nano Letters, 2011 We introduce mechanically reconfigurable photonic metamaterials (RPMs) as a flexible platform for realizing metamaterial devices with reversible and large-range tunable characteristics in the optical part of the spectrum. Here we illustrate this concept for a temperature-driven RPM exhibiting reversible relative transmission changes of up to 50%.
Ou, Jun-Yu +3 more
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Spatio-temporal characterization of ultrashort vector pulses
APL Photonics, 2021 Ultrafast vectorially polarized pulses have found many applications in information and energy transfer owing mainly to the presence of strong longitudinal components and their space-polarization non-separability.
Apostolos Zdagkas +3 more
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Holographic free-electron light source
Nature Communications, 2016 Controlling the generation of light in nano-scale systems is a challenging task and is of growing importance. Here, Li et al. propose a means of controlling the wavefront of light emanating from a single nano scale emitter by holographic principles using
Guanhai Li +4 more
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Plasmonic anapole metamaterial for refractive index sensing
PhotoniX, 2022 Electromagnetic anapole mode is a nonradiative state of light originating from the deconstructive interference of radiation of the oscillating electric and toroidal dipole moments.
Jin Yao +6 more
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Metarpillar: Soft robotic locomotion based on buckling-driven elastomeric metamaterials
Materials & Design, 2021 Mechanical instabilities are emerging as novel actuation mechanisms for the design of biomimetic soft robots and smart structures. The present study shows that by coupling buckling-driven elastomeric auxetic modules actuated by a negative air-pressure, a
B. Grossi +4 more
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Perfect Metamaterial Absorber [PDF]
Physical Review Letters, 2008 We present the design for an absorbing metamaterial element with near unity absorbance. Our structure consists of two metamaterial resonators that couple separately to electric and magnetic fields so as to absorb all incident radiation within a single unit cell layer. We fabricate, characterize, and analyze a metamaterial absorber with a slightly lower
Landy, N. I. +4 more
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Coding Metamaterials, Digital Metamaterials and Programming Metamaterials
, 2014 As artificial structures, metamaterials are usually described by macroscopic effective medium parameters, which are named as "analog metamaterials". Here, we propose "digital metamaterials" in two steps. Firstly, we present "coding metamaterials" that are composed of only two kinds of unit cells with 0 and phase responses, which we name as "0" and ...
Cui, Tie Jun +4 more
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Self-assembled hexagonal double fishnets as negative index materials
, 2010 We show experimentally the successful use of colloidal lithography for the fabrication of negative index metamaterials in the near-infrared wavelength range.
Borghs, Gustaaf +5 more
core +1 more source