scholarly journals Enhanced Sensitivity of Microring Resonator-Based Sensors Using the Finite Difference Time Domain Method to Detect Glucose Levels for Diabetes Monitoring

2020 ◽  
Vol 10 (12) ◽  
pp. 4191
Author(s):  
Lilik Hasanah ◽  
Harbi Setyo Nugroho ◽  
Chandra Wulandari ◽  
Budi Mulyanti ◽  
Dilla Duryha Berhanuddin ◽  
...  
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Laser Source ◽  
Quality Factors ◽  
Simulation Design ◽  
Glucose Levels ◽  
Difference Time

The properties of light and its interaction with biological analytes have made it possible to design sophisticated and reliable optical-based biomedical sensors. In this paper, we report the simulation, design, and fabrication of microring resonator (MRR)-based sensors for the detection of diabetic glucose levels. Electron Beam Lithography (EBL) with 1:1 hydrogen silsesquioxane (HSQ) negative tone resist were used to fabricate MRR on a Silicon-on-Insulator (SOI) platform. Scanning Electron Microscopy (SEM) was then used to characterize the morphology of the MRR device. The full-width at half-maximum (FWHM) and quality factors of MRR were obtained by using a tunable laser source (TLS) and optical spectrum analyzer (OSA). In this paper, the three-dimensional Finite Difference Time Domain (3D FDTD) approach has been used to simulate the proposed design. The simulation results show an accurate approximation with the experimental results. Next, the sensitivity of MRR-based sensors to detect glucose levels is obtained. The sensitivity value for glucose level detection in the range 0% to 18% is 69.44 nm/RIU. This proved that our MRR design has a great potential as a sensor to detect diabetic glucose levels.

Investigation of Adhesion Materials for Gold Line-and-Space Surface Plasmon Antenna on SOI-MOS Photodiode

2011 ◽  
Vol 222 ◽  
pp. 201-204 ◽  
Author(s):  
Hiroaki Satoh ◽  
Yuki Matsuo ◽  
Hiroshi Inokawa ◽  
Atsushi Ono
Keyword(s):  
Finite Difference ◽  
Surface Plasmon ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Fdtd Method ◽  
Light Sensitivity ◽  
Silicon On Insulator ◽  
Electromagnetic Simulation ◽  
Metal Insulator ◽  
Difference Time

In order to improve the light sensitivity of silicon-on-insulator metal-insulator-semiconductor (SOI-MOS) photodiode, differences caused by the adhesion materials for gold (Au) line-and-space (L/S) surface plasmon (SP) antenna in MOS structure are evaluated based on the electromagnetic simulation using finite difference time domain (FDTD) method.

scholarly journals Subwavelength Grating Structures in Silicon-on-Insulator Waveguides

2008 ◽  
Vol 2008 ◽  
pp. 1-8 ◽  
Author(s):  
J. H. Schmid ◽  
P. Cheben ◽  
S. Janz ◽  
J. Lapointe ◽  
E. Post ◽  
...  
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Silicon On Insulator ◽  
Experimental Results ◽  
Subwavelength Grating ◽  
Subwavelength Gratings ◽  
Facet Reflectivity ◽  
Difference Time ◽  
Photonic Wire

First implementations of subwavelength gratings (SWGs) in silicon-on-insulator (SOI) waveguides are discussed and demonstrated by experiment and simulations. The subwavelength effect is exploited for making antireflective and highly reflective waveguide facets as well as efficient fiber-chip coupling structures. We demonstrate experimentally that by etching triangular SWGs into SOI waveguide facets, the facet power reflectivity can be reduced from 31% to <2.5%. Similar structures using square gratings can also be used to achieve high facet reflectivity. Finite difference time-domain simulations show that >94% facet reflectivity can be achieved with square SWGs for 5 μm thick SOI waveguides. Finally, SWG fiber-chip couplers for SOI photonic wire waveguides are introduced, including design, simulation, and first experimental results.

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