22 August 2016 Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications
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Abstract
A label-free optical microring resonator biosensor based on lithium niobate-on-insulator (LNOI) technology is designed and simulated for biosensing applications. Although silicon-on-insulator technology is quite mature over LNOI for fabricating more compact microring resonators, the latter is attractive for its excellent electro-optic, ferroelectric, piezoelectric, photoelastic, and nonlinear optic properties, which can offer a wide range of tuning facilities for sensing. To satisfy the requirement of high sensitivity in biosensing, the dual-microring resonator model is applied to design the proposed sensor. The transmission spectrum obtained from two-dimensional simulations based on finite-difference time-domain method demonstrates that the designed LNOI microring sensor consisting of a 10-μm outer ring and a 5-μm inner ring offers a sensitivity of ∼68  nm/refractive index unit (RIU) and a minimum detection limit of 10−2 RIU. Finally, the sensor’s performance is simulated for glucose sensing, a biosensing application.
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
Shakila Naznin, Md. Sohel Mahmud Sher, "Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications," Optical Engineering 55(8), 087108 (22 August 2016). https://doi.org/10.1117/1.OE.55.8.087108 . Submission:
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