Abstract
In this work, we have evaluated the biosensing capability of the porous silicon (PSi) based sidewall Bragg-grating resonator. The approximation of the quasi-TE mode full vector for the eigenmode calculation is performed using a full vector mode solver. The transmission spectra of the device are evaluated using the transfer matrix method. We have observed a shift in the resonant band for a change in the refractive index of biomaterial in the upper cladding region. The theoretical value of the bulk sensitivity is calculated to be 387.48 nm/RIU. The device is suitable for biosensing application due to its ability of interacting signal with the infiltrated analytes in the PSi waveguide core.
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Acknowledgment
The authors would like to acknowledge the mutual understanding for joint and collaborative work among researchers from Malaviya National Institute of Technology Jaipur (India), Universiti Teknologi Malaysia, Johor Bahru (Malaysia), and the Ton Duc Thang University, Ho Chi Minh City (Vietnam).
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Sahu, S., Ali, J., Yupapin, P.P. et al. Porous Silicon Based Bragg-Grating Resonator for Refractive Index Biosensor. Photonic Sens 8, 248–254 (2018). https://doi.org/10.1007/s13320-018-0459-z
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DOI: https://doi.org/10.1007/s13320-018-0459-z