Subwavelength negative index planar terahertz metamaterial arrays using spiral split ring resonators for near field sensing

2015 ◽  
Vol 47 (3) ◽  
pp. 827-836 ◽  
Author(s):  
Nadeem Naeem ◽  
Alyani Ismail ◽  
Adam Reda Hassan Alhawari ◽  
Mohd Adzir Mahdi
Keyword(s):  
Near Field ◽  
Ring Resonators ◽  
Negative Index ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Field Sensing

scholarly journals Ultrastrong coupling in the near field of complementary split-ring resonators

2014 ◽  
Vol 90 (20) ◽  
Author(s):  
Curdin Maissen ◽  
Giacomo Scalari ◽  
Federico Valmorra ◽  
Mattias Beck ◽  
Jérôme Faist ◽  
...  
Keyword(s):  
Near Field ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators

Realization of 3D Isotropic Negative Index Materials using Massively Parallel and Manufacturable Microfabrication and Micromachining Technology

2006 ◽  
Vol 919 ◽  
Author(s):  
Logeeswaran VJ ◽  
M. Saif Islam ◽  
Mei Lin Chan ◽  
David A Horsley ◽  
Wei Wu ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Ring Resonators ◽  
Massively Parallel ◽  
Negative Index ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Negative Index Materials ◽  
Assembly Method ◽  
Self Assembled ◽  
Structural Layer

AbstractIn this paper, we present a method to realize a three dimensional (3D) homogeneous and isotropic negative index materials (3D-NIMs) fabricated using a low cost and massively parallel manufacturable microfabrication and microassembly technique. The construction of self-assembled 3D-NIM array was realized through two dimensional (2-D) planar microfabrication techniques exploiting the as-deposited residual stress imbalance between a bi-layer consisting of e-beam evaporated metal (650nm of chromium) and a structural layer of 500nm of low stress silicon nitride deposited by LPCVD on a silicon substrate.A periodic continuation of a single rectangular unit cell consisting of split-ring resonators (SRR) and wires were fabricated to generate a 3D assembly by orienting them along all three Cartesian axes. The thin chromium and silicon nitride bi-layer is formed as hinges. The strain mismatch between the two layers curls the structural layer (flap) containing the SRR upwards. The self-assembled out-of-plane angular position depends on the thickness and material composing the bi-layer. This built-in stress-actuated assembly method is suitable for applications requiring a thin dielectric layer for the SRR. The split-ring resonators and other structures are created on the membrane which is then assembled into the 3-D configuration.

scholarly journals Coupling Schemes in Terahertz Planar Metamaterials

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Dibakar Roy Chowdhury ◽  
Ranjan Singh ◽  
Antoinette J. Taylor ◽  
Hou-Tong Chen ◽  
Weili Zhang ◽  
...  
Keyword(s):  
Resonance Line ◽  
Ring Resonator ◽  
Near Field ◽  
Split Ring Resonator ◽  
Higher Order ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Sensing Applications ◽  
Lattice Mode

We present a review of the different coupling schemes in a planar array of terahertz metamaterials. The gap-to-gap near-field capacitive coupling between split-ring resonators in a unit cell leads to either blue shift or red shift of the fundamental inductive-capacitive (LC) resonance, depending on the position of the split gap. The inductive coupling is enhanced by decreasing the inter resonator distance resulting in strong blue shifts of theLCresonance. We observe theLCresonance tuning only when the split-ring resonators are in close proximity of each other; otherwise, they appear to be uncoupled. Conversely, the higher-order resonances are sensitive to the smallest change in the inter particle distance or split-ring resonator orientation and undergo tremendous resonance line reshaping giving rise to a sharp subradiant resonance mode which produces hot spots useful for sensing applications. Most of the coupling schemes in a metamaterial are based on a near-field effect, though there also exists a mechanism to couple the resonators through the excitation of lowest-order lattice mode which facilitates the long-range radiative or diffractive coupling in the split-ring resonator plane leading to resonance line narrowing of the fundamental as well as the higher order resonance modes.

scholarly journals Tunable split-ring resonators for nonlinear negative-index metamaterials

2006 ◽  
Vol 14 (20) ◽  
pp. 9344 ◽  
Author(s):  
Ilya V. Shadrivov ◽  
Steven K. Morrison ◽  
Yuri S. Kivshar
Keyword(s):  
Ring Resonators ◽  
Negative Index ◽  
Split Ring ◽  
Split Ring Resonators

Infrared plasmonic meta-modes via near-field coupling of metallic nanorods with split-ring resonators

2019 ◽  
Vol 30 (39) ◽  
pp. 395203
Author(s):  
Rithvik R Gutha ◽  
Seyed M Sadeghi ◽  
Christina Sharp ◽  
Ali Hatef
Keyword(s):  
Near Field ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Field Coupling ◽  
Metallic Nanorods

Negative index of refraction in metallic metamaterial comprising split-ring resonators

2008 ◽  
Vol 77 (5) ◽  
Author(s):  
Zheng-Gao Dong ◽  
Shuang-Ying Lei ◽  
Ming-Xiang Xu ◽  
Hui Liu ◽  
Tao Li ◽  
...  
Keyword(s):  
Index Of Refraction ◽  
Ring Resonators ◽  
Negative Index ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Negative Index Of Refraction
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