Optical Magnetic Field Enhancement by Strong Coupling in Metamaterials

Chen, Jing; Nie, Hai; Zha, Tangqun; Mao, Peng; Tang, Chaojun; Shen, Xueyang; Park, Gun‐Sik

doi:10.1109/jlt.2018.2822777

Cited by 46 publications

(18 citation statements)

References 65 publications

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“…[10,11] The capacity of metamaterials for electric field confinement has enabled the realization of a range of physical phenomena in metamaterials, such as electron emission [12] and phase transition in quantum materials. The ability of metamaterials to manipulate the magnetic field has enabled their applications to inductive wireless power transfer, [18] enhancement of the magneto-optic effect, [19] high-quality sensing, [20,21] plasmonic perfect absorption, [22] and magnetic field confinement, [23,24] among others. The ability of metamaterials to manipulate the magnetic field has enabled their applications to inductive wireless power transfer, [18] enhancement of the magneto-optic effect, [19] high-quality sensing, [20,21] plasmonic perfect absorption, [22] and magnetic field confinement, [23,24] among others.…”

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confidence: 99%

“…[13] In turn, the electric field enhancement resulting from the near-field confinement leads to nonlinear responses in metamaterials that have been harnessed to enable high harmonic generation, [14] saturable absorption, [15] phase-conjugation, [16] and optical electrifying effects, [17] among other features.In addition to confining the electric field, metamaterials are capable of interacting with and efficiently tailoring the magnetic field. The ability of metamaterials to manipulate the magnetic field has enabled their applications to inductive wireless power transfer, [18] enhancement of the magneto-optic effect, [19] high-quality sensing, [20,21] plasmonic perfect absorption, [22] and magnetic field confinement, [23,24] among others. Another important application of the capacity for magnetic field manipulation is magnetic resonance imaging (MRI), which is the focus herein.…”

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confidence: 99%

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Intelligent Metamaterials Based on Nonlinearity for Magnetic Resonance Imaging

Zhao

Duan

et al. 2019

Advanced Materials

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the optical regime. [10,11] The capacity of metamaterials for electric field confinement has enabled the realization of a range of physical phenomena in metamaterials, such as electron emission [12] and phase transition in quantum materials. [13] In turn, the electric field enhancement resulting from the near-field confinement leads to nonlinear responses in metamaterials that have been harnessed to enable high harmonic generation, [14] saturable absorption, [15] phase-conjugation, [16] and optical electrifying effects, [17] among other features.In addition to confining the electric field, metamaterials are capable of interacting with and efficiently tailoring the magnetic field. The ability of metamaterials to manipulate the magnetic field has enabled their applications to inductive wireless power transfer, [18] enhancement of the magneto-optic effect, [19] high-quality sensing, [20,21] plasmonic perfect absorption, [22] and magnetic field confinement, [23,24] among others. Another important application of the capacity for magnetic field manipulation is magnetic resonance imaging (MRI), which is the focus herein. For example, negative permeability metamaterials have been employed as waveguides [25] and lenses [26] to image deep tissues using 1.5 Tesla (T) MRI systems and a cylindrical meta-atom has been developed to mitigate the field inhomogeneity in 7 T MRI systems based on the Kerker effect. [27] Recently, judiciously designed metamaterials, consisting of wire [28] or helical resonator arrays, [29] have been utilized to enhance the signal-to-noise ratio (SNR) of the MRI by amplifying the radio-frequency (RF) magnetic field strength due to their capacity for magnetic field enhancement. However, an ongoing limitation of currently available linear metamaterials (LMMs) for enhancing SNR in MRI systems reported to date is their linear nature, resulting in an amplification of the magnetic field during both RF transmission and reception phases in MRI, as shown in Figure 1a. The adoption of an LMM in MRI therefore requires modification of the RF excitation pulses during the transmission phase, [28,29] resulting in undue complications, suboptimal performance, potential safety concerns, and a substantial impediment to clinical adoption.Nonlinear metamaterials (NLMMs) yield an opportunity to construct intelligent and self-adaptive metamaterials in order to selectively enhance the magnetic field during MRI. By leveraging the voltage-dependent capacitance of a varactor diode induced by a reverse-biased p-n junction, [30,31] we developed an NLMM operating at RF frequencies. As opposed

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Intelligent Metamaterials Based on Nonlinearity for Magnetic Resonance Imaging

Zhao

Duan

et al. 2019

Advanced Materials

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“…Based on the performance enhanced sensing designs by using the asymmetric high quality-factor resonance mode, in the past several years, researchers further proposed other kinds of high quality-factor metamaterial units for sensing applications, including the toroidal resonance [55,[59][60][61], anapole resonance [56,[62][63][64][65][66][67], and enhanced magnetic plasmon resonance [68][69][70][71][72][73][74]. For examples, by placing the period symmetric arrangement of the Fano resonator shown in Figure 2C-i as the mirror symmetric arrangement shown in Figure 2D, one can get the toroidal resonance with quality factor larger than the regular Lorentz resonance [63].…”

Section: Discussion and Perspectivementioning

confidence: 99%

Advanced Electromagnetic Metamaterials for Temperature Sensing Applications

Chen

Zheng

et al. 2021

Front. Phys.

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Metamaterials with novel properties have excited much research attention in the past several decades. Many applications have been proposed and developed for the reported metamaterials in various engineering areas. Specifically, for the resonant-type metamaterials with narrow resonance line width and strong resonance strength, the resonant frequency and strength are highly depended on the changings of meta-atom structure and/or substrate media properties induced by the environment physical or chemistry parameters varying. Therefore, physical or chemistry sensing applications for the resonant-type metamaterial units or arrays are developed in recent years. In this mini review, to help the researchers in those fields to catch up with the newly research advances, we would like to summarize the recently reported high-performance metamaterial-inspired sensing applications, especially the temperature sensing applications, based on different kinds of metamaterials. Importantly, by analyzing the advantages and disadvantages of several conventional metamaterial units, the newly proposed high quality-factor metamaterial units are discussed for high-precision sensing applications, in terms of the sensitivity and resolution. This mini review can guide researchers in the area of metamaterial-inspired sensors to find some new design routes for high-precision sensing.

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“…Instead, we can tailor the shape and size of the structural units of a MM, tune the composition and morphology of the nanostructure, and achieve new, desired functionalities [13]. For example, by positioning metamaterials above a thick silver film separated by a silica dielectric spacer layer, or by suspending the metamaterials to reduce the effect of the substrate [14]- [16], enhancing and modifying the magnetic plasmon resonance in metamaterials can be realized, which may find great potential applications in label-free biomedical sensing. Metasurfaces, comprising of a class of optical MMs with a reduced dimensionality, enable unprecedented control of the wavefront of light beam and thus have successfully opened a versatile avenue for the development of focusing and imaging devices, angular-momentum-based quantum information processing and integrated nano-optoelectronics [17]- [21].…”

Section: Introductionmentioning

confidence: 99%

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

Tian

Guo

et al. 2020

IEEE Photonics J.

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Beam splitters, especially those with tunable split ratios, play significant role in interferometers, spectrometers, and communication systems. To this end, we proposed a polarization-controllable beam splitter based on dielectric metasurface composed of an array of dielectric pillars. The dielectric metasurface presents phase gradients along two orthogonal directions, say, x-and y-axis, with each phase gradient applicable to one of two orthogonal linear polarizations. Due to the orthogonality of the dual phase gradients in both position and polarization, an elliptically polarized incident beam can be diffracted into two refracted beams, one lies within xoz plane and the other in yoz plane. More importantly, the split ratio of the two refracted beams is continuously tunable by changing the ellipticity of incident beam. Under extreme case, x-or y-polarized incident beam is refracted into one beam, but in different planes for different kind of linear polarization. Besides, the refracted angle of each refracted beam in respective refracted plane can be easily set by adjusting the phase difference of adjacent rows or columns of metasurface. With same method, a polarization-controllable dual-wavelength beam splitter is also achieved on the basis of phase-gradient metasurface. Such a noncoplanar beam splitter with tunable split ratios may play significant role in novel miniature optical devices and systems.

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Optical Magnetic Field Enhancement by Strong Coupling in Metamaterials

Cited by 46 publications

References 65 publications

Intelligent Metamaterials Based on Nonlinearity for Magnetic Resonance Imaging

Intelligent Metamaterials Based on Nonlinearity for Magnetic Resonance Imaging

Advanced Electromagnetic Metamaterials for Temperature Sensing Applications

Nanoscale Noncoplanar Beam Splitters With Tunable Split Ratio

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