A quasi-quantitative demonstration of multi-mode refractive index sensors based on standing-wave plasmonic resonances in split ring resonators

2009 ◽  
Author(s):  
Yun-Tzu Chang ◽  
Ta-Jen Yen
Keyword(s):  
Refractive Index ◽  
Standing Wave ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Refractive Index Sensors ◽  
Multi Mode

scholarly journals Chiral metamaterials with negative refractive index based on four “U” split ring resonators

2010 ◽  
Vol 97 (8) ◽  
pp. 081901 ◽  
Author(s):  
Zhaofeng Li ◽  
Rongkuo Zhao ◽  
Thomas Koschny ◽  
Maria Kafesaki ◽  
Kamil Boratay Alici ◽  
...  
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Ring Resonators ◽  
Split Ring ◽  
Split Ring Resonators ◽  
Chiral Metamaterials

scholarly journals Nanofabrication of planar split ring resonators for negative refractive index metamaterials in the infrared range

2006 ◽  
Vol 71 (6) ◽  
pp. 695-703 ◽  
Author(s):  
Zoran Jaksic ◽  
Dana Vasiljevic-Radovic ◽  
Milan Maksimovic ◽  
Milija Sarajlic ◽  
Zoran Djuric
Keyword(s):  
Refractive Index ◽  
Negative Refractive Index ◽  
Building Blocks ◽  
Ring Resonators ◽  
Infrared Range ◽  
Process Conditions ◽  
Split Ring ◽  
Crystal Silicon ◽  
Split Ring Resonators ◽  
Positive Photoresist

Experimental nanofabrication of planar structures for one-dimensional metamaterials designed to achieve a negative effective refractive index in the mid-infrared range (5-10 micrometers) was performed. Double split ring and complementary double split ring resonators (SRR and CSRR) with square and circular geometries, were chosen to be fabricated since these are the basic building blocks to achieve a negative effective dielectric permittivity and magnetic permeability. Scanning probe nanolithography with z-scanner movement was used to fabricate straight-line and curvilinear segments with a line width of 80-120 nm. The geometries were delineated in 20 nm thin silver layers sputter-deposited on a positive photoresist substrate spin-coated on polished single crystal silicon wafers, as well as on polycarbonate slabs. The morphology of the structures was characterized by atomic force microscopy. The feature repeatibility was 60-150 nm, depending on the process conditions and the feature complexity. The nanolithographic groove depth in different samples ranged from 4 nm to 80 nm.

scholarly journals Design of Tunable Terahertz Metamaterial Sensor with Single- and Dual-Resonance Characteristic

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2212
Author(s):  
Jiahao Yang ◽  
Yu-Sheng Lin
Keyword(s):  
Refractive Index ◽  
Tuning Range ◽  
High Efficiency ◽  
Ring Resonators ◽  
Frequency Range ◽  
Split Ring ◽  
Resonance Characteristic ◽  
Dual Resonance ◽  
Selective Detectors ◽  
Refractive Index Sensors

We present two types of refractive index sensors by using tunable terahertz (THz) metamaterial (TTM) based on two concentric split-ring resonators (SRRs) with different splits. By modifying the distance between SRRs and substrate, TTM shows tunable single- and dual-resonance characteristic. The maximum tuning range of resonance is 0.432 THz from 0.958 THz to 1.390 THz. To demonstrate a great flexibility of TTM in real application, TTM device is exposed on the surrounding ambient with different refractive index (n). The sensitivity of TTM can be enhanced by increasing SRR height, which is increased from 0.18 THz/RIU to 1.12 THz/RIU under the condition of n = 1.1. These results provide a strategy to improve the sensing performance of the metamaterial-based sensing device by properly arranging the geometric position of meta-atoms. The proposed TTM device can be used for tunable filters, frequency-selective detectors, and tunable high-efficiency sensors in the THz frequency range.

Sign in / Sign up

Export Citation Format

Share Document