scholarly journals Subwavelength Grating Double Slot Waveguide Racetrack Ring Resonator for Refractive Index Sensing Application

Sensors ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 3416 ◽  
Author(s):  
Nikolay Lvovich Kazanskiy ◽  
Svetlana Nikolaevna Khonina ◽  
Muhammad Ali Butt
Keyword(s):  
Ring Resonator ◽  
Numerical Study ◽  
Slot Waveguide ◽  
Lab On Chip ◽  
Subwavelength Grating ◽  
Resonator Design ◽  
Highly Sensitive ◽  
Light Matter Interaction ◽  
On Chip ◽  
The One

In this paper, a racetrack ring resonator design based on a subwavelength grating double slot waveguide is presented. The proposed waveguide scheme is capable of confining the transverse electric field in the slots and the gaps between the grating segments. This configuration facilitates a large light–matter interaction which elevates the sensitivity of the device approximately 2.5 times higher than the one that can be obtained via a standard slot waveguide resonator. The best sensitivity of the design is obtained at 1000 nm/RIU by utilizing a subwavelength grating double slot waveguide of period 300 nm. The numerical study is conducted via 2D and 3D finite element methods. We believe that the proposed sensor design can play an important role in the realization of highly sensitive lab-on-chip sensors.

scholarly journals The Rise of the OM-LoC: Opto-Microfluidic Enabled Lab-on-Chip

Micromachines ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1467
Author(s):  
Harry Dawson ◽  
Jinane Elias ◽  
Pascal Etienne ◽  
Sylvie Calas-Etienne
Keyword(s):  
Low Cost ◽  
Optical Components ◽  
New Era ◽  
Lab On Chip ◽  
Highly Sensitive ◽  
Multiple Challenges ◽  
On Chip ◽  
Optical Circuits ◽  
Made In

The integration of optical circuits with microfluidic lab-on-chip (LoC) devices has resulted in a new era of potential in terms of both sample manipulation and detection at the micro-scale. On-chip optical components increase both control and analytical capabilities while reducing reliance on expensive laboratory photonic equipment that has limited microfluidic development. Notably, in-situ LoC devices for bio-chemical applications such as diagnostics and environmental monitoring could provide great value as low-cost, portable and highly sensitive systems. Multiple challenges remain however due to the complexity involved with combining photonics with micro-fabricated systems. Here, we aim to highlight the progress that optical on-chip systems have made in recent years regarding the main LoC applications: (1) sample manipulation and (2) detection. At the same time, we aim to address the constraints that limit industrial scaling of this technology. Through evaluating various fabrication methods, material choices and novel approaches of optic and fluidic integration, we aim to illustrate how optic-enabled LoC approaches are providing new possibilities for both sample analysis and manipulation.

Development of highly sensitive polysilicon nanogap with APTES/GOx based lab-on-chip biosensor to determine low levels of salivary glucose

2014 ◽  
Vol 220 ◽  
pp. 101-111 ◽  
Author(s):  
Sharma Rao Balakrishnan ◽  
U. Hashim ◽  
G.R. Letchumanan ◽  
M. Kashif ◽  
A.R. Ruslinda ◽  
...  
Keyword(s):  
Lab On Chip ◽  
Highly Sensitive ◽  
Low Levels ◽  
On Chip

Design and Modelling of Highly Sensitive Glucose Biosensor for Lab-on-chip Applications

Silicon ◽  
2022 ◽  
Author(s):  
M. Durga Prakash ◽  
Shaik Lathifa Nihal ◽  
Shaik Ahmadsaidulu ◽  
Raghunandan Swain ◽  
Asisa Kumar Panigrahy
Keyword(s):  
Glucose Biosensor ◽  
Lab On Chip ◽  
Highly Sensitive ◽  
On Chip

Highly sensitive lab-on-chip with deep learning AI for detection of bacteria in water

2019 ◽  
Vol 12 (2) ◽  
pp. 495-501 ◽  
Author(s):  
Shaikh Afzal Nehal ◽  
Debpriyo Roy ◽  
Manju Devi ◽  
T. Srinivas
Keyword(s):  
Deep Learning ◽  
Lab On Chip ◽  
Highly Sensitive ◽  
On Chip

scholarly journals On-chip temperature compensation in an integrated slot-waveguide ring resonator refractive index sensor array

2010 ◽  
Vol 18 (4) ◽  
pp. 3226 ◽  
Author(s):  
Kristinn B. Gylfason ◽  
Carl F. Carlborg ◽  
Andrzej Kazmierczak ◽  
Fabian Dortu ◽  
Hans Sohlström ◽  
...  
Keyword(s):  
Refractive Index ◽  
Temperature Compensation ◽  
Sensor Array ◽  
Ring Resonator ◽  
Refractive Index Sensor ◽  
Slot Waveguide ◽  
Chip Temperature ◽  
Waveguide Ring ◽  
On Chip

scholarly journals Nanophotonics: An Emerging and Promising Approach for COVID-19 Diagnostic Technology

2022 ◽  
Author(s):  
Annmaria Antony ◽  
Eileen Chen ◽  
Shreya Kakhandiki ◽  
Ahsan Habib
Keyword(s):  
Ring Resonator ◽  
Point Of Care ◽  
Turnaround Time ◽  
Disease Spread ◽  
Health Crisis ◽  
Lab On Chip ◽  
Large Populations ◽  
Lateral Flow Assays ◽  
Diagnostic Technology ◽  
On Chip

The public health crisis initiated by the emergence of the COVID-19 pandemic emphasizes the need for rapid and accurate diagnostic tests to monitor large populations through community mass testing. Many testing techniques have been implemented to prevent disease spread, critical to pandemic control. Polymerase chain reaction (PCR) tests for detecting viral RNA and immunoassay tests for detecting SARS-CoV-2 antibodies are currently used to diagnose COVID-19. PCR tests are time-consuming, with a 24–48 hours turnaround time. Samples undergoing PCR detection must also be sent to a laboratory to be processed by highly specialized workers, preventing a point-of-care diagnosis from being provided. Popular immunoassay tests have drawbacks as well. Enzyme-linked immunosorbent assays (ELISAs) are extremely labor-intensive and expensive, whereas lateral flow assays (LFAs) are primarily used for antigen detection. In this work, we propose a photonic SARS-CoV-2 detection method based on a ring resonator. We calculate the sensor performance using the finite-difference eigenmode (FDE) method. The sensor sensitivity in ring resonator resonance frequency is 29 nm/RIU, with an intrinsic detection level (iLOD) of 6.89 × 10-5 RIU. We envision ring resonator-based lab-on-chip devices being widely used for applications such as early diagnosis, with the added benefit of being ultra-compact and easily handled by non-specialists.

On-Chip Chemical Sensing Using Slot-Waveguide-Based Ring Resonator

2020 ◽  
Vol 20 (11) ◽  
pp. 5970-5975
Author(s):  
Viphretuo Mere ◽  
Hemalatha Muthuganesan ◽  
Yusuf Kar ◽  
Cor Van Kruijsdijk ◽  
Shankar Kumar Selvaraja
Keyword(s):  
Chemical Sensing ◽  
Ring Resonator ◽  
Slot Waveguide ◽  
On Chip
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