Optimization of a liquid refractive index sensor based on an integrated optic slot-waveguide directional coupler

被引：1

作者：

Kang, Moon Hee ^{[1
,2
]}

Kim, Nari ^{[3
]}

Kim, Yong Hyun ^{[4
]}

Yun, Changhun ^{[2
]}

机构：

[1] Keimyung Univ, Dept Elect Energy Engn, 1095 Dalgubeol Daero, Daegu 42601, South Korea

[2] Korea Inst Ind Technol, Ctr Nanophoton Convergence Technol, 6 Cheomdangwagi Ro 208beon Gil, Gwangju 61012, South Korea

[3] Chonnam Natl Univ, Dept Phys, 77 Yongbong Ro, Gwangju 61186, South Korea

[4] Pukyong Natl Univ, Dept Display Engn, 45 Yongso Ro, Busan 48513, South Korea

来源：

OPTIK | 2019年 / 180卷

关键词：

Slot-waveguide; Integrated optic; Directional coupler; Refractive index sensor; SURFACE-PLASMON RESONANCE; CONFINING LIGHT; SENSITIVITY;

D O I：

10.1016/j.ijleo.2018.11.121

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An integrated optic silica slot-waveguide directional coupler is investigated here for its ability to measure the refractive index (n) of a liquid biochemical species. The geometrical dimensions of the directional coupler are optimized so that the output power of the directional coupler is linear when refractive index of the liquid species changes from 1.33 to 1.38. The best geometrical dimensions achieved here from a simulation with the beam propagation method (BPM) were a waveguide width of 6um, a gap of 2um, a slot-widht of 0.5um, and a channel length of 2,000um. The proposed directional coupler type of biochemical sensor changes its output power linearly from 2 to 24% when the refractive index of the liquid species varies from 1.33 to 1.38.

引用

页码：984 / 990

页数：7

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