scholarly journals All-optical on-chip sensor for high refractive index sensing

2015 ◽  
Vol 106 (3) ◽  
pp. 031116 ◽  
Author(s):  
Yazhao Liu ◽  
H. W. M. Salemink
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensing ◽  
All Optical ◽  
On Chip

scholarly journals Ultra-High Refractive Index Sensing Structure Based on a Metal-Insulator-Metal Waveguide-Coupled T-Shape Cavity with Metal Nanorod Defects

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1433 ◽  
Author(s):  
Yuan-Fong Chou Chau ◽  
Chung-Ting Chou Chao ◽  
Hung Ji Huang ◽  
N. T. R. N. Kumara ◽  
Chee Ming Lim ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Rectangular Cavity ◽  
Cavity Resonance ◽  
Refractive Index Sensor ◽  
Metal Insulator ◽  
Refractive Index Sensing ◽  
Metal Insulator Metal ◽  
On Chip ◽  
Mim Waveguide

An ultra-high plasmonic refractive index sensing structure composed of a metal–insulator–metal (MIM) waveguide coupled to a T-shape cavity and several metal nanorod defects is proposed and investigated by using finite element method. The designed plasmonic MIM waveguide can constitute a cavity resonance zone and the metal nanorod defects can effectively trap the light in the T-shape cavity. The results reveal that both the size of defects in wider rectangular cavity and the length of narrower rectangular cavity are primary factors increasing the sensitivity performance. The sensitivity can achieve as high as 8280 nm/RIU (RIU denotes the refractive index unit), which is the highest sensitivity reported in plasmonic MIM waveguide-based sensors to our knowledge. In addition, the proposed structure can also serve as a temperature sensor with temperature sensitivity as high as 3.30 nm/°C. The designed structure with simplicity and ease of fabrication can be applied in sensitivity nanometer scale refractive index sensor and may potentially be used in optical on-chip nanosensor.

Three-band perfect absorber with high refractive index sensing based on active tunable Dirac semimetal

2021 ◽  
Author(s):  
Zhiyou Li ◽  
Zao Yi ◽  
Tinting Liu ◽  
Li Liu ◽  
Xifang Chen ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Gold Layer ◽  
Perfect Absorber ◽  
Refractive Index Sensing ◽  
Dirac Semimetal

In this paper, we designed a three-band narrowband perfect absorber based on Bulk Dirac semimetallic (BDS) metamaterials. The absorber consists of a hollow Dirac semimetallic layer above, a gold layer...

On-chip integrated differential optical microring refractive index sensing platform based on a laminar flow scheme

2015 ◽  
Vol 40 (17) ◽  
pp. 4106 ◽  
Author(s):  
Dongwan Kim ◽  
Paula Popescu ◽  
Mark Harfouche ◽  
Jacob Sendowski ◽  
Maria-Eleni Dimotsantou ◽  
...  
Keyword(s):  
Refractive Index ◽  
Laminar Flow ◽  
Flow Scheme ◽  
Refractive Index Sensing ◽  
Sensing Platform ◽  
On Chip

Double Fano-type resonances in heptamer-hole array transmission spectra with high refractive index sensing

2015 ◽  
Vol 62 (15) ◽  
pp. 1241-1247 ◽  
Author(s):  
Jinna He ◽  
Pei Ding ◽  
Junqiao Wang ◽  
Chunzhen Fan ◽  
Erjun Liang
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Hole Array ◽  
Transmission Spectra ◽  
Refractive Index Sensing

scholarly journals Broadband and Highly Directional Visible Light Scattering by Laser-Splashed Lossless TiO2 Nanoparticles

Molecules ◽  
2021 ◽  
Vol 26 (20) ◽  
pp. 6106
Author(s):  
Yinan Zhang ◽  
Shiren Chen ◽  
Jing Han
Keyword(s):  
Refractive Index ◽  
Tio2 Nanoparticles ◽  
Silicon Germanium ◽  
High Refractive Index ◽  
Photonic Devices ◽  
Forward Scattering ◽  
Visible Range ◽  
Great Promise ◽  
Scattering Ratio ◽  
On Chip

All-dielectric nanoparticles, as the counterpart of metallic nanostructures have recently attracted significant interest in manipulating light-matter interaction at a nanoscale. Directional scattering, as an important property of nanoparticles, has been investigated in traditional high refractive index materials, such as silicon, germanium and gallium arsenide in a narrow band range. Here in this paper, we demonstrate that a broadband forward scattering across the entire visible range can be achieved by the low loss TiO2 nanoparticles with moderate refractive index. This mainly stems from the optical interferences between the broadband electric dipole and the magnetic dipole modes. The forward/backward scattering ratio reaches maximum value at the wavelengths satisfying the first Kerker’s condition. Experimentally, the femtosecond pulsed laser was employed to splash different-sized nanoparticles from a thin TiO2 film deposited on the glass substrate. Single particle scattering measurement in both the forward and backward direction was performed by a homemade confocal microscopic system, demonstrating the broadband forward scattering feature. Our research holds great promise for many applications such as light harvesting, photodetection and on-chip photonic devices and so on.

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