Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications
Design of a lithium niobate-on-insulator-based optical microring resonator for biosensing applications
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DOI：
10.1117/1.oe.55.8.087108
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发表时间：
2016-08
影响因子：
1.3
通讯作者：
Shakila Naznin;Md Sohel M. Sher
中科院分区：
文献类型：
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作者：
Shakila Naznin;Md Sohel M. Sher
抽象的。设计并模拟了一种基于锂离子绝缘体（LNOI）技术的无标记光学微谐振腔生物传感器。虽然硅绝缘体技术是相当成熟的LNOI制造更紧凑的微谐振器，后者是有吸引力的，其出色的电光，铁电，压电，光弹性，和非线性光学特性，可以提供广泛的调谐设施的传感。为了满足生物传感中高灵敏度的要求，采用双微腔谐振器模型设计了该传感器。基于时域有限差分法的二维模拟结果表明，所设计的LNOI微结构传感器由10 μm外环和5 μm内环组成，其灵敏度为10 - 68 nm/RIU，最低检测限为10−2 RIU。最后，传感器的性能进行了模拟葡萄糖传感，生物传感应用。
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.