scholarly journals Design of Transmission-Type Refractive Index Sensor, Based on Silica Planar Lightwave Circuit Using Combination of Refractive Angle and Phase Measurements

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4095
Author(s):  
Koichi Maru
Keyword(s):  
Refractive Index ◽  
Optical Measurement ◽  
Fourier Optics ◽  
Refractive Index Sensor ◽  
Measurement Equipment ◽  
Phase Measurements ◽  
Absolute Refractive Index ◽  
Planar Lightwave Circuit ◽  
Simulation Results ◽  
Planar Lightwave

A transmission-type refractive index sensor, based on planar lightwave circuit (PLC) technology is proposed. In the proposed structure, we introduce a combination of coarse measurements, using the dependence of the angle of refraction and fine measurement, and the dependence of the phase on the refractive index to measure the absolute refractive index precisely, without expensive optical measurement equipment. The theoretical model of the proposed refractive index sensor is derived based on Fourier optics and transfer function to simulate its performance. The simulation results for the use of the 2.5%-Δ silica-based PLC technology indicate that the proposed structure has the potential to achieve a refractive index error of approximately 1 × 10−6 RIU or less when a monitored power deviation of ±0.05 dB is accepted.

scholarly journals Proposed design for high precision refractive index sensor using integrated planar lightwave circuit

2009 ◽  
Vol 2 (1) ◽  
pp. 39-44 ◽  
Author(s):  
Koichi Maru ◽  
Yusaku Fujii ◽  
Shulian Zhang ◽  
Wenmei Hou
Keyword(s):  
Refractive Index ◽  
High Precision ◽  
Refractive Index Sensor ◽  
Planar Lightwave Circuit ◽  
Planar Lightwave

Independently tunable dual resonant dip refractive index sensor based on metal-insulator-metal waveguide with Q-shaped resonant cavity

2022 ◽  
Author(s):  
Haowen Chen ◽  
Yunping Qi ◽  
Jinghui Ding ◽  
Yujiao Yuan ◽  
Zhenting Tian ◽  
...  
Keyword(s):  
Refractive Index ◽  
Resonant Cavity ◽  
Fdtd Method ◽  
High Sensitivity ◽  
Refractive Index Sensor ◽  
Metal Insulator ◽  
Metal Waveguide ◽  
Metal Insulator Metal ◽  
Simulation Results ◽  
Refractive Index Sensors

Abstract A plasmonic resonator system consisting of a metal-insulator-metal waveguide and a Q-shaped resonant cavity is proposed in this paper. The transmission properties of surface plasmon polaritons in this structure are investigated using the finite difference in time domain (FDTD) method, and the simulation results contain two resonant dips. And the physical mechanism is studied by the multimode interference coupled mode theory (MICMT), the theoretical results are in highly consistent with the simulation results. Furthermore, the parameters of the Q-shaped cavity can be controlled to adjust two dips respectively. The refractive index sensor with a sensitivity of 1578nm/RIU and figure of merit (FOM) of 175, performs better than most of the similar structures. Therefore, the results of the study are instructive for the design and application of high sensitivity nanoscale refractive index sensors.

Design on Novel Photoelectric Sensor for Refractive Index Measurement

2011 ◽  
Vol 383-390 ◽  
pp. 692-696
Author(s):  
Yin Lin Li ◽  
Zhong Hua Huang ◽  
Kai Bo Hu
Keyword(s):  
Refractive Index ◽  
Optical Measurement ◽  
Differential Method ◽  
Sensitive Detector ◽  
Refractive Index Measurement ◽  
Index Measurement ◽  
Photoelectric Sensor ◽  
Measurement Principle ◽  
Position Sensitive ◽  
Simulation Results

A novel photoelectric sensor based on differential method and position sensitive detector for refractive index (RI) measurement is proposed. In the paper, we systematically proposed an electro-optical measurement principle, built a mathematical model, and designed the structure of sensing probe; through detail calculation, key parameters of the refractometer are determined, simulation results showed that resolution reaches order of 10-6, preliminary experiment also verified the feasibility of the design.

scholarly journals Dual Fano Resonances Induced by Rectangle-based Plasmonic Resonator for Refractive Index Nano-sensor

2021 ◽  
Vol 2125 (1) ◽  
pp. 012005
Author(s):  
Yang Zhang
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Important Application ◽  
Refractive Index Sensor ◽  
Fano Resonances ◽  
Metal Insulator ◽  
Metal Insulator Metal ◽  
Simulation Results ◽  
Photonic Circuit ◽  
Plasmonic Resonator

Abstract A tunable dual Fano-like plasmonic structure consisting of metal-insulator-metal (MIM), baffle and a rectangular cavity containing two identical rectangular metal blocks is obtained. Numerical simulation results show that there are dual Fano resonances in the transmission spectrum of the structure, which can be tuned by changing the geometric parameters of the structure. In addition, due to the apparent asymmetry of the Fano resonances, the system was developed as an effective refractive index sensor (RIS) with a sensitivity of 853 nm/RIU and figure of merit (FOM) of 1631. It is considered that this structure has important application value in high integrated photonic circuit.

scholarly journals A Tunable Optical Bragg Grating Filter Based on the Droplet Sagging Effect on a Superhydrophobic Nanopillar Array

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3324
Author(s):  
Meng Zhang ◽  
Jiansheng Liu ◽  
Weifeng Cheng ◽  
Jiangtao Cheng ◽  
Zheng Zheng
Keyword(s):  
Refractive Index ◽  
Planar Waveguide ◽  
Tuning Range ◽  
Liquid Droplet ◽  
Tunable Filter ◽  
Bragg Grating ◽  
Refractive Index Sensor ◽  
Narrow Bandwidth ◽  
Simulation Results ◽  
Index Unit

Nanostructures have been widely applied on superhydrophobic surfaces for controlling the wetting states of liquid microdroplets. Many modern optic devices including sensors are also integrated with micro- or nanostructures for function enhancement. However, it is rarely reported that both microfluidics and optics are compatibly integrated in the same nanostructures. In this paper, a novel microfluidic-controlled tunable filter composed of an array of periodic micro/nanopillars on top of a planar waveguide is proposed and numerically simulated, in which the periodic pillars endow both the Bragg grating and the superhydrophobic functions. The tunability of grating is achieved by controlling the sagging depth of a liquid droplet into the periodic pillars. Simulation results show that a narrow bandwidth of 0.4 nm and a wide wavelength tuning range over 25 nm can be achieved by such a microfluidic-based tunable optofluidic waveguide Bragg grating filter. Moreover, this proposed scheme can be easily modified as a refractive index sensor with a sensitivity of 103 nm per refractive index unit.

scholarly journals A highly sensitive SPR refractive index sensor based on microfluidic channel assisted with graphene-Ag composite nanowire

2021 ◽  
pp. 1-1
Author(s):  
Akhilesh Pathak ◽  
Charusluk Viphavakit ◽  
B M A Rahman ◽  
Vinod Kumar Singh
Keyword(s):  
Refractive Index ◽  
Microfluidic Channel ◽  
Refractive Index Sensor ◽  
Highly Sensitive

scholarly journals Refractive Index Sensor for Salty and Sugary Solution Based on Optical Fiber Technical

2021 ◽  
Vol 1879 (3) ◽  
pp. 032077
Author(s):  
Maher Khaleel Ibrahim ◽  
Shehab A Kadhim ◽  
Nabeil Ibrahim Fawaz
Keyword(s):  
Refractive Index ◽  
Optical Fiber ◽  
Refractive Index Sensor
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