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Approach to design of optical microring resonator for biosensing with enhanced efficiency

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Abstract

In this paper, design strategies for enhancement of efficiency for biosensing using optical microring resonator are described. Medical diagnostics play a crucial role in healthcare as it aims to provide early diagnosis of diseases. This urges the need to design an efficient point-of-care diagnostics to improve healthcare technologies. Among the existing biosensors, microring resonator based dielectric waveguide integrated biosensors possess a promising performance. The evanescent fields generated due to propagation of light extends beyond the structure and serves as the sole reason for field sensing. In this study, couple of strategies are addressed to design high r.i. contrast silicon-on-insulator (SOI) microring resonator to improve the efficiency of bio-sensing. The first strategy emphasizes on reducing resonator height for enhanced evanescence as sensing applications solely lie on evanescent fields. In the other approach, the conventional air-cladded waveguide coupling is replaced by the oxide-based waveguide coupling which results in higher coupling and higher Q-factor due to lowered index difference between the core and the cladding materials.

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Authors and Affiliations

  1. University of Engineering and Management, Kolkata, India

    Piyali Mukherjee

  2. Institute of Radio Physics and Electronics, University of Calcutta, Kolkata, India

    Piyali Mukherjee & N. R. Das

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  1. Piyali Mukherjee
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  2. N. R. Das
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Correspondence to Piyali Mukherjee.

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Mukherjee, P., Das, N.R. Approach to design of optical microring resonator for biosensing with enhanced efficiency. Microsyst Technol 27, 3629–3637 (2021). https://doi.org/10.1007/s00542-020-05126-8

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  • DOI: https://doi.org/10.1007/s00542-020-05126-8

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