scholarly journals Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

Sensors ◽  
2019 ◽  
Vol 19 (22) ◽  
pp. 5038 ◽  
Author(s):  
Hongjun Gu ◽  
He Gong ◽  
Chunxue Wang ◽  
Xiaoqiang Sun ◽  
Xibin Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sodium Chloride ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Label Free ◽  
Detection Range ◽  
Sodium Chloride Solutions ◽  
Sensing Application ◽  
Index Unit

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 μm × 13 μm on the silicon-on-insulator (SOI) platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. The IG-SMRR has an ultra-large quasi-FSR of 84.5 nm as the detection range, and enlarged factor is up to over 3 compared with the conventional SMRR. The concentration sensitivities of sodium chloride solutions and D-glucose solutions are 996.91 pm/% and 968.05 pm/%, respectively, and the corresponding refractive index (RI) sensitivities are 559.5 nm/RIU (refractive index unit) and 558.3 nm/RIU, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

scholarly journals Compact Inner-Wall Grating Slot Microring Resonator for Label-Free Sensing

2019 ◽  
Author(s):  
Hongjun Gu ◽  
He Gong ◽  
Chunxue Wang ◽  
Xiaoqiang Sun ◽  
Xinbin Wang ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Structural Parameters ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Label Free ◽  
Detection Range ◽  
Sodium Chloride Solutions ◽  
Transmission Properties ◽  
Sensing Application ◽  
Simulation Results

In this paper, we present and analyze a compact inner-wall grating slot microring resonator (IG-SMRR) with the footprint of less than 13 μm × 13 μm on the SOI platform for label-free sensing, which comprises a slot microring resonator (SMRR) and inner-wall grating (IG). Its detection range is significantly enhanced without the limitation of the free spectral region (FSR) owing to the combination of SMRR and IG. Structural parameters of IG and SMRR are investigated and optimized for favorable transmission properties. The simulation results shows that the IG-SMRR has an ultra-large quasi-FSR of 84.6 nm, and the concentration sensitivities of sodium chloride solutions and D-glucose solutions are up to 960.61 pm/% and 933.06 pm/%, respectively. The investigation on the combination of SMRR and IG is a valuable exploration of label-free sensing application for ultra-large detection range and ultra-high sensitivity in future.

scholarly journals Design Rule of Mach-Zehnder Interferometer Sensors for Ultra-High Sensitivity

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2640 ◽  
Author(s):  
Yiwei Xie ◽  
Ming Zhang ◽  
Daoxin Dai
Keyword(s):  
Refractive Index ◽  
High Sensitivity ◽  
Silicon On Insulator ◽  
Zehnder Interferometer ◽  
Design Rule ◽  
Wavelength Shift ◽  
Shift Measurement ◽  
Refractive Index Unit ◽  
Index Unit ◽  
Mach Zehnder Interferometer

A design rule for a Mach-Zehnder interferometer (MZI) sensor is presented, allowing tunable sensitivity by appropriately choosing the MZI arm lengths according to the formula given in this paper. The present MZI sensor designed by this method can achieve an ultra-high sensitivity, which is much higher than any other traditional MZI sensors. An example is given with silicon-on-insulator (SOI) nanowires and the device sensitivity is as high as 106 nm/refractive-index -unit (or even higher), by choosing the MZI arms appropriately. This makes it possible for one to realize a low-cost optical sensing system with a detection limit as high as 10−6 refractive-index-unit, even when a cheap optical spectrum analyzer with low-resolution (e.g., 1 nm) is used for the wavelength-shift measurement.

Microring Resonator Chemical Sensor Based on Si3N4 Waveguides

2011 ◽  
Vol 199-200 ◽  
pp. 1954-1957
Author(s):  
Yao Chen
Keyword(s):  
Refractive Index ◽  
Optical Characteristic ◽  
Chemical Sensor ◽  
High Sensitivity ◽  
Microring Resonator ◽  
Q Factor ◽  
Free Spectrum ◽  
Cmos Compatible ◽  
Liquid Sensing ◽  
Index Unit

Microring resonator based on Si3N4 waveguides was fabricated by using CMOS compatible processes with 1 µm wide waveguides and 200 µm in radius. The optical characteristic of the resonator was measured with a Q factor up to 20,000 and a free spectrum range (FSR) of 1 nm. The structure was further packaged to be a sensor for liquid sensing. Finally, the sensor was applied to detect concentrations of glucose solutions with sensitivity of 1.78×10-5 refractive index unit (RIU), which proves its functionality and feasible application as high sensitivity chemical sensor.

scholarly journals Tunable Split-Disk Metamaterial Absorber for Sensing Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 598 ◽  
Author(s):  
Yusheng Zhang ◽  
Peng Lin ◽  
Yu-Sheng Lin
Keyword(s):  
Refractive Index ◽  
Correlation Coefficient ◽  
Gas Sensors ◽  
High Sensitivity ◽  
Metamaterial Absorber ◽  
Si Substrate ◽  
Insulator Layer ◽  
Sensing Application ◽  
Index Unit ◽  
Tunable Absorption

We present four designs of tunable split-disk metamaterial (SDM) absorbers. They consist of a bottom gold (Au) mirror layer anchored on Si substrate and a suspended-top SDM nanostructure with one, two, three, and four splits named SDM-1, SDM-2, SDM-3, and SDM-4, respectively. By tailoring the geometrical configurations, the four SDMs exhibit different tunable absorption resonances spanning from 1.5 µm to 5.0 µm wavelength range. The resonances of absorption spectra can be tuned in the range of 320 nm, and the absorption intensities become lower by increasing the gaps of the air insulator layer. To increase the sensitivity of the proposed devices, SDMs exhibit high sensitivities of 3312 nm/RIU (refractive index unit, RIU), 3362 nm/RIU, 3342 nm/RIU, and 3567 nm/RIU for SDM-1, SDM-2, SDM-3, and SDM-4, respectively. The highest correlation coefficient is 0.99999. This study paves the way to the possibility of optical gas sensors and biosensors with high sensitivity.

scholarly journals Simple Application of Time Correlated Single Photon Counter of Picosecond Pulsed Laser to Measure Refractive Index of Saline Solution

2019 ◽  
Vol 9 (2) ◽  
pp. 105
Author(s):  
Isnaeni Isnaeni ◽  
Reynaldi Gilang Mulyawan ◽  
Ahmad Reza Hakimi
Keyword(s):  
Refractive Index ◽  
Sodium Chloride ◽  
Single Photon ◽  
Pulsed Laser ◽  
Basic Research ◽  
Refractive Indices ◽  
Photon Counter ◽  
Sodium Chloride Solutions ◽  
Quantitative Calculation ◽  
Optical Properties Of Materials

Time correlated single photon counter was design for measuring fluorescence lifetime of emitting materials. It was designed for photonics basic research and science that is usually done in a laboratory. Furthermore, time correlated single photon counter can be used to measure simple and more practical optical properties of materials, such as refractive index. However, since the system was not designed for this practical application, a simple setup modification and calculation is required. In this work, time correlated single photon counter is utilized to measure the refractive index of sodium chloride solutions. The measurement was done using simple time of flight calculation of each pulse of picosecond pulsed laser. Our measurement was done on different concentrations of sodium chloride that have different refractive indices. It was found that the measurement technique and calculation was able to produce consistent quantitative calculation of refractive indices.  

A review: metamaterial sensors for material characterization

Sensor Review ◽  
2019 ◽  
Vol 39 (3) ◽  
pp. 417-432 ◽  
Author(s):  
A. Vivek ◽  
K. Shambavi ◽  
Zachariah C. Alex
Keyword(s):  
Material Characterization ◽  
Research Work ◽  
Wave Interaction ◽  
High Sensitivity ◽  
Electromagnetic Spectrum ◽  
Label Free ◽  
Content Type ◽  
Work Related ◽  
Sensing Application ◽  
And Performance

Purpose This paper aims to focus on research work related to metamaterial-based sensors for material characterization that have been developed for past ten years. A decade of research on metamaterial for sensing application has led to the advancement of compact and improved sensors. Design/methodology/approach In this study, relevant research papers on metamaterial sensors for material characterization published in reputed journals during the period 2007-2018 were reviewed, particularly focusing on shape, size and nature of materials characterized. Each sensor with its design and performance parameters have been summarized and discussed here. Findings As metamaterial structures are excited by electromagnetic wave interaction, sensing application throughout electromagnetic spectrum is possible. Recent advancement in fabrication techniques and improvement in metamaterial structures have led to the development of compact, label free and reversible sensors with high sensitivity. Originality/value The paper provides useful information on the development of metamaterial sensors for material characterization.

scholarly journals Quantification of Neuropeptide Y with Picomolar Sensitivity Enabled by Guided-Mode Resonance Biosensors

Sensors ◽  
2019 ◽  
Vol 20 (1) ◽  
pp. 126 ◽  
Author(s):  
Mohammad G. Abdallah ◽  
Joseph A. Buchanan-Vega ◽  
Kyu J. Lee ◽  
Brett R. Wenner ◽  
Jeffery W. Allen ◽  
...  
Keyword(s):  
Neuropeptide Y ◽  
Near Infrared ◽  
Single Point ◽  
High Sensitivity ◽  
Quantitative Detection ◽  
Label Free ◽  
Sensor Surface ◽  
Detection Range ◽  
Guided Mode ◽  
Guided Mode Resonance

Assessing levels of neuropeptide Y (NPY) in the human body has many medical uses. Accordingly, we report the quantitative detection of NPY biomarkers applying guided-mode resonance (GMR) biosensor methodology. The label-free sensor operates in the near-infrared spectral region exhibiting distinctive resonance signatures. The interaction of NPY with bioselective molecules on the sensor surface causes spectral shifts that directly identify the binding event without additional processing. In the experiments described here, NPY antibodies are attached to the sensor surface to impart specificity during operation. For the low concentrations of NPY of interest, we apply a sandwich NPY assay in which the sensor-linked anti-NPY molecule binds with NPY that subsequently binds with anti-NPY to close the sandwich. The sandwich assay achieves a detection limit of ~0.1 pM NPY. The photonic sensor methodology applied here enables expeditious high-throughput data acquisition with high sensitivity and specificity. The entire bioreaction is recorded as a function of time, in contrast to label-based methods with single-point detection. The convenient methodology and results reported are significant, as the NPY detection range of 0.1–10 pM demonstrated is useful in important medical circumstances.

Performance of the Active Microring Resonator Based on SOI Rib Waveguide

2012 ◽  
Vol 462 ◽  
pp. 375-379
Author(s):  
B. Mardiana ◽  
A.R. Hanim ◽  
H. Hazura ◽  
S. Shaari ◽  
P. Susthitha Menon ◽  
...  
Keyword(s):  
Refractive Index ◽  
Ring Resonator ◽  
Refractive Index Change ◽  
Electrical Signal ◽  
Free Carrier ◽  
Simulation Software ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Carrier Injection ◽  
Rib Waveguide

Micro-ring resonator based on silicon-on-insulator (SOI) has been extensively studied due to its many advantages, thus promising to improve the optoelectronic integrated circuit performance. This paper highlights the study of the free carrier injection effect on the silicon rib waveguide with p-i-n diode structure integrated in the SOI micro-ring resonator. The free carrier concentrations have been modulated by the electrical signal that can cause change of refractive index of the micro-ring resonator. The device performances are predicted by using numerical modelling software 2D SILVACO and Finite Difference Time Domain method simulation software RSOFT. The results show the change of refractive index is maximized at a greater applied voltage. A shift in resonant wavelength of around 6.7 nm was predicted at 0.9V with 1.14x10-3refractive index change. It is also shown that 8.5dB change of the output response obtained through the output.

Sign in / Sign up

Export Citation Format

Share Document