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A Multi-Slot-Waveguide-Based Ring Resonator Sensor on Silicon-on-Insulator Platform: Design and Simulation

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Abstract:

We design a double slots based on micro-ring resonator on silicon-on-insulator (SOI). An asymmetric structure is considered for the ring waveguide in order to improve the sensor's bending efficiency. Finite-difference time-domain (FDTD) method is used to analyze and optimize this sensor. The optimized size of the sensor is below 25×15μm2. Numerical analysis shows that when the radius of the micro-ring is about 5μm, the sensitivity reaches a value of 708nm/RIU, which is ten times of that of the conventional micro-ring sensor. Quality factor (Q factor) of 580 and free spectral range (FSR) of 33nm are also obtained. Our analysis also shows that the sensor has good sensing characteristics to different organic solutions.

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Periodical:

Advanced Materials Research (Volume 710)

Pages:

404-407

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.710.404

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Online since:

June 2013

Authors:

Liang Gao, Guo Hui Yuan, Xing Li Liu, Yu Ren Chen

Keywords:

Biosensor, Label-Free, Ring Resonator, Silicon-on-Insulator (SOI), Slot Waveguide

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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