Materials, Photonic Devices, and Sensors

Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications

[+] Author Affiliations
Shakila Naznin, Md. Sohel Mahmud Sher

Khulna University, Electronics and Communication Engineering Discipline, Khulna 9208, Bangladesh

Opt. Eng. 55(8), 087108 (Aug 22, 2016). doi:10.1117/1.OE.55.8.087108
History: Received April 18, 2016; Accepted July 28, 2016
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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 102 RIU. Finally, the sensor’s performance is simulated for glucose sensing, a biosensing application.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Shakila Naznin and Md. Sohel Mahmud Sher
"Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications", Opt. Eng. 55(8), 087108 (Aug 22, 2016). ; http://dx.doi.org/10.1117/1.OE.55.8.087108


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