High figure of merit refractive index nanosensor based on Fano resonances in waveguide

2020 ◽  
Vol 14 (02) ◽  
pp. 1
Author(s):  
Yusen Wang ◽  
Shilin Yu ◽  
Tonggang Zhao ◽  
Zonghai Hu ◽  
Shuo Wang
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Fano Resonances ◽  
High Figure

Fano Resonances in Thin Metallic Grating for Refractive Index Sensing with High Figure of Merit

Plasmonics ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 139-149 ◽  
Author(s):  
Lixia Li ◽  
Yuzhang Liang ◽  
Mengdi Lu ◽  
Wei Peng
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Fano Resonances ◽  
Metallic Grating ◽  
Refractive Index Sensing ◽  
High Figure

Double plasmon induced transparency in disk and nanobars coupled nanosystems and its application to plasmonic resonance sensing

2016 ◽  
Vol 30 (14) ◽  
pp. 1650150
Author(s):  
Fang Chen ◽  
Duanzheng Yao
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Slow Light ◽  
Highly Sensitive ◽  
Integrated Optical ◽  
High Figure ◽  
Induced Transparency ◽  
Optical Circuits ◽  
Coupled Harmonic Oscillator ◽  
Plasmon Induced Transparency

We demonstrate the realization of plasmon induced transparency (PIT) in a nanostructure composed of silver nanobars and a silver nanodisk. The optical properties of the planar metamaterials have been investigated theoretically in the paper. The classical coupled harmonic oscillator model demonstrates the PIT phenomenon in a nanodisk–nanobar system. Additionally, double PIT response is observed when two nanobars are located in proximity to the silver nanodisk. The PIT window wavelength and bandwidths can be efficiently tuned by controlling the geometric parameters such as the lengths of nanobars and the coupling distances between the nanodisk and nanobars. Moreover, the transparency window shows highly sensitive response to the refractive index of the environmental medium. A high figure of merit up to 15.5 of the asymmetrical system for refractive index sensing is achieved. The tunability of the PIT may have potential application on slow light and highly integrated optical circuits.

scholarly journals Nanoslotted microring resonator for high figure of merit refractive index sensing

2020 ◽  
Vol 50 (1) ◽  
Author(s):  
Daquan Yang ◽  
Bing Duan ◽  
Xuan Zhang ◽  
Hui Lu
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Microring Resonator ◽  
Strong Light ◽  
Refractive Index Sensing ◽  
Biochemical Sensing ◽  
Light Matter Interaction ◽  
High Figure

A nanoslotted microring resonator (NSMR) with enhanced light-matter interaction has been designed, which can be used for high sensitive refractive index sensing. The performance of the device is investigated theoretically based on a three-dimensional finite-difference time-domain (3D-FDTD) method. In order to achieve high figure of merit sensing, the nanoslot geometry is exploited to make the optical field strongly localized inside the low index region and overlap sufficiently with the analytes. By using the 3D-FDTD method, the proposed NSMR sensor device achieves a high Q-factor (Q > 105) and sensitivity ~100 nm/RIU (RIU – refractive index unit). Moreover, the strong light confinement introduced by the nanoslot in NSMR results in the sensor figure of merit as high as 6.73 × 103. Thus, the design we proposed is a promising platform for refractive index-based biochemical sensing and lab-on-a-chip applications.

scholarly journals Refractive index sensing with Fano resonances in silicon oligomers

2017 ◽  
Vol 375 (2090) ◽  
pp. 20160070 ◽  
Author(s):  
Katie E. Chong ◽  
Henry W. Orton ◽  
Isabelle Staude ◽  
Manuel Decker ◽  
Andrey E. Miroshnichenko ◽  
...  
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Spectral Features ◽  
Fano Resonances ◽  
Refractive Index Sensitivity ◽  
New Horizons ◽  
Refractive Index Sensing ◽  
Index Sensitivity

We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interference of the modes of the outer and the central disks, we demonstrate refractive index sensitivity of more than 150 nm RIU −1 with a figure of merit of 3.8. This article is part of the themed issue ‘New horizons for nanophotonics’.

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.

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