Design of an ultra-compact slotted photonic crystal nanobeam cavity for biosensing

被引：32

作者：

Lin, Tong ^{[1
]}

Zhang, Xingwang ^{[1
]}

Zhou, Guangya ^{[1
]}

Siong, Chau Fook ^{[1
]}

Deng, Jie ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore

[2] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

来源：

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 2015年 / 32卷 / 09期

关键词：

REFRACTIVE-INDEX;

D O I：

10.1364/JOSAB.32.001788

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Here, we elucidate a novel biosensor in aqueous environments based on a slotted photonic crystal nanobeam cavity. A slot is introduced in the center of the photonic crystal nanobeam cavity, which reduces the mode volume by an order of 10 without sacrificing the quality factor and sensitivity. This sensor is characteristic of an ultrasmall mode volume of 0.076 (lambda/n)(3) and shows a prominent advantage in regards to single nanoparticle detection, where the minimum detectable nanoparticle radius is around 1 nm. Additionally, its quality factor is as high as 6.08 x 10(6) and its sensitivity is around 460 nm/RIU, which is promising for refractive index sensing. This sensor can also be integrated into a high-density array of sensor networks because of the unparalleled fabrication advantages. (C) 2015 Optical Society of America

引用

页码：1788 / 1791

页数：4

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