Broadband infrared metamaterial absorber with raindrop-shaped submicron-scale disk array

A dual-band microwave metamaterial absorber with single-peak regulation and wide-angle absorption has been proposed and illustrated. The designed metamaterial absorber is consisted of hollow-cross resonators, solid-cross resonators, dielectric substrate and metallic background plane. Strong absorption peak coefficients of 99.92% and 99.55% are achieved at 8.42 and 11.31 GHz, respectively, which is basically consistent with the experimental results. Surface current density and changing material properties are employed to illustrate the absorptive mechanism. More importantly, the proposed dual-band metamaterial absorber has the adjustable property of single absorption peak and could operate well at wide incidence angles for both transverse electric (TE) and transverse magnetic (TM) waves. Research results could provide and enrich instructive guidances for realizing a single-peak-regulation and wide-angle dual-band metamaterial absorber.

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Bio-Inspired Submicron Electrodes

MRS Proceedings ◽

10.1557/proc-775-p5.4 ◽

2003 ◽

Vol 775 ◽

Cited By ~ 1

Author(s):

Ivan Stanish ◽

Daniel A. Lowy ◽

Alok Singh

Keyword(s):

Electrode Surface ◽

Structural Integrity ◽

Electron Flow ◽

Charge Storage ◽

Electroactive Material ◽

Electron Coupling ◽

Strong Potential ◽

Electrical Potentials ◽

Submicron Scale ◽

Potential Gradients

AbstractImmobilized polymerized electroactive vesicles (IPEVs) are submicron biocapsules capable of storing charge in confined environments and chemisorbing on surfaces. Methods to immobilize stable submicron sized electroactive vesicles and the means to measure electroactivity of IPEVs at nanolevels have been demonstrated. IPEVs can withstand steep potential gradients applied across their membrane, maintain their structural integrity against surfaces poised at high/low electrical potentials, retain electroactive material over several days, and reversibly mediate (within the membrane) electron flow between the electrode surface and vesicle interior. IPEVs have strong potential to be used for charge storage and electron coupling applications that operate on the submicron scale and smaller.

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Micromechanical Disk Array for Enhanced Frequency Stability Against Bias Voltage Fluctuations

10.21236/ada624236 ◽

2014 ◽

Author(s):

Lingqi Wu

Keyword(s):

Bias Voltage ◽

Frequency Stability ◽

Voltage Fluctuations ◽

Disk Array

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A Wide-Band Metamaterial Absorber Based on Loaded Magnetic Resonators

Chinese Physics Letters ◽

10.1088/0256-307x/28/6/067808 ◽

2011 ◽

Vol 28 (6) ◽

pp. 067808 ◽

Cited By ~ 6

Author(s):

Chao Gu ◽

Shao-Bo Qu ◽

Zhi-Bin Pei ◽

Hua Ma ◽

Zhuo Xu ◽

...

Keyword(s):

Wide Band ◽

Metamaterial Absorber

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A Compact Ultra-Wideband Polarization-Insensitive Metamaterial Absorber at 5G Millimeter Wave Band

2020 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO) ◽

10.1109/nemo49486.2020.9343462 ◽

2020 ◽

Author(s):

Xiaoyong LEI ◽

Shuyun HUO ◽

Mengjun WANG ◽

Yan LI ◽

Erping LI

Keyword(s):

Millimeter Wave ◽

Metamaterial Absorber ◽

Ultra Wideband ◽

Wave Band ◽

Millimeter Wave Band ◽

Polarization Insensitive

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Multiband Terahertz Metamaterial Absorber Based on Multipolar Plasmonic Resonances

Plasmonics ◽

10.1007/s11468-020-01322-4 ◽

2021 ◽

Author(s):

Kavitha Muthukrishnan ◽

Venkateswaran Narasimhan

Keyword(s):

Metamaterial Absorber

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Synthesis of short-range ordered aluminosilicates at ambient conditions

Scientific Reports ◽

10.1038/s41598-021-83643-w ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Katharina R. Lenhardt ◽

Hergen Breitzke ◽

Gerd Buntkowsky ◽

Erik Reimhult ◽

Max Willinger ◽

...

Keyword(s):

Short Range ◽

Spatial Arrangement ◽

Aluminium Chloride ◽

Ambient Conditions ◽

Soils And Sediments ◽

Submicron Scale ◽

Mineral Structure ◽

Temperature And Pressure ◽

Physical And Chemical ◽

Microscopic Techniques

AbstractWe report here on structure-related aggregation effects of short-range ordered aluminosilicates (SROAS) that have to be considered in the development of synthesis protocols and may be relevant for the properties of SROAS in the environment. We synthesized SROAS of variable composition by neutralizing aqueous aluminium chloride with sodium orthosilicate at ambient temperature and pressure. We determined elemental composition, visualized morphology by microscopic techniques, and resolved mineral structure by solid-state 29Si and 27Al nuclear magnetic resonance and Fourier-transform infrared spectroscopy. Nitrogen sorption revealed substantial surface loss of Al-rich SROAS that resembled proto-imogolite formed in soils and sediments due to aggregation upon freezing. The effect was less pronounced in Si-rich SROAS, indicating a structure-dependent effect on spatial arrangement of mass at the submicron scale. Cryomilling efficiently fractured aggregates but did not change the magnitude of specific surface area. Since accessibility of surface functional groups is a prerequisite for sequestration of substances, elucidating physical and chemical processes of aggregation as a function of composition and crystallinity may improve our understanding of the reactivity of SROAS in the environment.

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Magnetic properties of (Bi1−xLax)(Fe,Co)O3 films fabricated by a pulsed DC reactive sputtering and demonstration of magnetization reversal by electric field

Scientific Reports ◽

10.1038/s41598-021-90547-2 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Munusamy Kuppan ◽

Daichi Yamamoto ◽

Genta Egawa ◽

Sivaperuman Kalainathan ◽

Satoru Yoshimura

Keyword(s):

Electric Field ◽

Magnetization Reversal ◽

High Performance ◽

Magnetic Domain ◽

Magnetic Film ◽

Film Plane ◽

Force Microscopy ◽

Domain Structures ◽

Pulsed Dc ◽

Submicron Scale

Abstract(Bi1−xLax)(Fe,Co)O3 multiferroic magnetic film were fabricated using pulsed DC (direct current) sputtering technique and demonstrated magnetization reversal by applied electric field. The fabricated (Bi0.41La0.59)(Fe0.75Co0.25)O3 films exhibited hysteresis curves of both ferromagnetic and ferroelectric behavior. The saturated magnetization (Ms) of the multiferroic film was about 70 emu/cm3. The squareness (S) (= remanent magnetization (Mr)/Ms) and coercivity (Hc) of perpendicular to film plane are 0.64 and 4.2 kOe which are larger compared with films in parallel to film plane of 0.5 and 2.5 kOe. The electric and magnetic domain structures of the (Bi0.41La0.59)(Fe0.75Co0.25)O3 film analyzed by electric force microscopy (EFM) and magnetic force microscopy (MFM) were clearly induced with submicron scale by applying a local electric field. This magnetization reversal indicates the future realization of high performance magnetic device with low power consumption.

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