Three-dimensional metamaterials: from split ring resonator to toroidal metamolecule

2014 ◽  
Author(s):  
Pin Chieh Wu ◽  
Wei Ting Chen ◽  
Yao-Wei Huang ◽  
Wei-Lun Hsu ◽  
Chun Yen Liao ◽  
...  
Keyword(s):  
Ring Resonator ◽  
Three Dimensional ◽  
Split Ring Resonator ◽  
Split Ring

Spectroscopic Characteristics of Three Dimensional Split-Ring Resonator Arrays at Terahertz Frequencies

2015 ◽  
Vol 15 (3) ◽  
pp. 2289-2293 ◽  
Author(s):  
David Shawn Wilbert ◽  
Mohammad Parvinnezhad Hokmabadi ◽  
Patrick Kung ◽  
Seongsin Margaret Kim
Keyword(s):  
Ring Resonator ◽  
Three Dimensional ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Spectroscopic Characteristics ◽  
Terahertz Frequencies ◽  
Resonator Arrays

scholarly journals Low-Cost and Lightweight 3D-Printed Split-Ring Resonator for Chemical Sensing Applications

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 3049 ◽  
Author(s):  
Ahmed Salim ◽  
Saptarshi Ghosh ◽  
Sungjoon Lim
Keyword(s):  
Chemical Sensing ◽  
Ring Resonator ◽  
Low Cost ◽  
Three Dimensional ◽  
External Cavity ◽  
Cavity Resonator ◽  
Split Ring Resonator ◽  
Microwave Cavity ◽  
Split Ring ◽  
Sensing Applications

In this paper, a microwave cavity resonator is presented for chemical sensing applications. The proposed resonator is comprised of a three dimensional (3D) split-ring resonator (SRR) residing in an external cavity and capacitively coupled by a pair of coaxial probes. 3D-printing technology with polylactic acid (PLA) filament is used to build the 3D SRR and cavity. Then, the surfaces of the SRR and the inside walls of cavity are silver-coated. The novelty of our proposed structure is its light weight and inexpensive design, owing to the utilization of low density and low-cost PLA. A Teflon tube is passed through the split-gap of the SRR so that it is parallel to the applied electric field. With an empty tube, the resonance frequency of the structure is measured at 2.56 GHz with an insertion loss of 13.6 dB and quality factor (Q) of 75. A frequency shift of 205 MHz with respect to the empty channel was measured when deionized water (DIW) was injected into the tube. Using volume occupied by the structure, the weight of the proposed microwave resonator is estimated as 22.8 g which is significantly lighter than any metallic structure of comparable size.

scholarly journals Enhancing Absorption Bandwidth through Vertically Oriented Metamaterials

2019 ◽  
Vol 9 (11) ◽  
pp. 2223 ◽  
Author(s):  
Aaron J. Pung ◽  
Michael D. Goldflam ◽  
D. Bruce Burckel ◽  
Igal Brener ◽  
Michael B. Sinclair ◽  
...  
Keyword(s):  
Degrees Of Freedom ◽  
Ring Resonator ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Split Ring Resonator ◽  
Unit Cell ◽  
Cell Coupling ◽  
Split Ring ◽  
Projection Lithography ◽  
Three Dimensional Space

Metamaterials research has developed perfect absorbers from microwave to optical frequencies, mainly featuring planar metamaterials, also referred to as metasurfaces. In this study, we investigated vertically oriented metamaterials, which make use of the entire three-dimensional space, as a new avenue to widen the spectral absorption band in the infrared regime between 20 and 40 THz. Vertically oriented metamaterials, such as those simulated in this work, can be experimentally realized through membrane projection lithography, which allows a single unit cell to be decorated with multiple resonators by exploiting the vertical dimension. In particular, we analyzed the cases of a unit cell containing a single vertical split-ring resonator (VSRR), a single planar split-ring resonator (PSRR), and both a VSRR and PSRR to explore intra-cell coupling between resonators. We show that the additional degrees of freedom enabled by placing multiple resonators in a unit cell lead to novel ways of achieving omnidirectional super absorption. Our results provide an innovative approach for controlling and designing engineered nanostructures.

scholarly journals Probing split-ring resonator permeabilities with loop-gap resonators

2018 ◽  
Vol 96 (8) ◽  
pp. 878-886 ◽  
Author(s):  
J.S. Bobowski
Keyword(s):  
Ring Resonator ◽  
Three Dimensional ◽  
Split Ring Resonator ◽  
Complex Permeability ◽  
Microwave Response ◽  
Split Ring ◽  
Microwave Frequencies ◽  
One Dimensional ◽  
Inductively Coupled ◽  
Magnetic Plasma

A method is proposed to experimentally determine the effective complex permeability of split-ring resonator (SRR) arrays used in the design of metamaterials at microwave frequencies. We analyze the microwave response of a loop-gap resonator (LGR) whose bore has been partially loaded with one or more SRRs. Our analysis reveals that the resonance frequency, magnetic plasma frequency, and damping constant of the effective permeability of the SRR array can be extracted from fits to the reflection coefficient (S11) of an inductively coupled LGR. We propose LGR designs that would allow both a one-dimensional array of SRRs and small three-dimensional arrays of SRRs to be characterized. Finally, we demonstrate the method using a toroidal LGR loaded with a single extended SRR of length z.

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