Abstract
A low-cost intensity detection-based refractive index (RI) sensor is proposed and developed for rapid RI sensing. The sensor is composed of a planar waveguide structure on a low-cost glass substrate with an integrated microfluidic channel, which was fabricated using a simple, low-cost, vacuum-less and lithography-less process, making it suitable for mass production. Variation in the output light intensity, proportional to the RI of input solutions, is used as the simple and real-time mechanism for RI detection. A good RI resolution of \(4.65\times {10}^{-4}\mathrm{ RIU}\) is achieved through RI experiments. These results suggest that the developed waveguide optofluidic sensors are promising for rapid and sensitive bio-medical detection.
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Acknowledgements
This work at CCU was supported by Ministry of Science and Technology of Taiwan (MOST) under the grant numbers of MOST 107-2218-E-194 -004 and 108-2218-E-194-001, and Advanced Institute of Manufacturing with High-tech Innovations (AIM-HI) from The Featured Areas Research Centre Program within the framework of the Higher Education Sprout Project by the Ministry of Education (MOE) in Taiwan.
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Barshilia, D., Chang, GE. (2021). Planar Waveguide-based Optofluidic Refractive Index Sensors for Real-time Biomedical Sensing. In: Das, N.R., Sarkar, S. (eds) Computers and Devices for Communication. CODEC 2019. Lecture Notes in Networks and Systems, vol 147. Springer, Singapore. https://doi.org/10.1007/978-981-15-8366-7_36
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DOI: https://doi.org/10.1007/978-981-15-8366-7_36
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