Subwavelength grating waveguide racetrack-based refractive index sensor with improved figure of merit

2020 ◽  
Vol 59 (33) ◽  
pp. 10613
Author(s):  
Yu Sun ◽  
Guohua Hu ◽  
Yiping Cui
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Refractive Index Sensor ◽  
Subwavelength Grating

scholarly journals Spectrometer-Free Graphene Plasmonics Based Refractive Index Sensor

Sensors ◽  
2020 ◽  
Vol 20 (8) ◽  
pp. 2347 ◽  
Author(s):  
Li Zhang ◽  
Mohamed Farhat ◽  
Khaled Nabil Salama
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Chemical Potential ◽  
Gas Sensing ◽  
Refractive Index Sensor ◽  
Mode Of Operation ◽  
Free Graphene ◽  
One Step ◽  
Terahertz Sensing ◽  
Electrical Mode

We propose a spectrometer-free refractive index sensor based on a graphene plasmonic structure. The spectrometer-free feature of the device is realized thanks to the dynamic tunability of graphene’s chemical potential, through electrostatic biasing. The proposed sensor exhibits a 1566 nm/RIU sensitivity, a 250.6 RIU−1 figure of merit in the optical mode of operation and a 713.2 meV/RIU sensitivity, a 246.8 RIU−1 figure of merit in the electrical mode of operation. This performance outlines the optimized operation of this spectrometer-free sensor that simplifies its design and can bring terahertz sensing one step closer to its practical realization, with promising applications in biosensing and/or gas sensing.

scholarly journals Plasmonic Refractive Index Sensor with High Figure of Merit Based on Concentric-Rings Resonator

2017 ◽  
Author(s):  
Zhaojian Zhang ◽  
Junbo Yang ◽  
Xin He ◽  
Jingjing Zhang ◽  
Jie Huang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Near Infrared ◽  
Optical Resolution ◽  
Infrared Region ◽  
Refractive Index Sensor ◽  
Plasmonic Sensor ◽  
Special Cases ◽  
Metal Insulator Metal ◽  
High Figure

A plasmonic refractive index (RI) sensor based on metal-insulator-metal (MIM) waveguide coupled with concentric double rings resonator (CDRR) is proposed and investigated numerically. Utilizing the novel supermodes of the CDRR, the FWHM of the resonant wavelength can be modulated, and a sensitivity of 1060 nm/RIU with high figure of merit (FOM) 203.8 is realized in the near-infrared region. The unordinary modes as well as the influence of structure parameters on the sensing performance are also discussed. Such plasmonic sensor with simple framework and high optical resolution could be applied to on-chip sensing systems and integrated optical circuits. Besides, the special cases of bio- sensing and triple rings are also discussed.

scholarly journals Numerical analysis of a near-infrared plasmonic refractive index sensor with high figure of merit based on a fillet cavity

2016 ◽  
Vol 24 (9) ◽  
pp. 9975 ◽  
Author(s):  
Lei Chen ◽  
Yumin Liu ◽  
Zhongyuan Yu ◽  
Dong Wu ◽  
Rui Ma ◽  
...  
Keyword(s):  
Refractive Index ◽  
Numerical Analysis ◽  
Figure Of Merit ◽  
Near Infrared ◽  
Refractive Index Sensor ◽  
High Figure
Sign in / Sign up

Export Citation Format

Share Document