Multifunctional disk device for optical switch and temperature sensor

• 作者: 卞振宇 张郁靖 易丽璇 梁瑞生 赖根 赵瑞通
• 来源期刊: 中国物理B（英文版）
• 关键词: surface plasmon polaritons optical switch modulation depth temperature sensor figure of merit
• 年，卷（期）: 2015,（10）
• 页码范围: 107801-1-107801-4
• 页数: 1页
• 语种: 英文
• DOI: 10.1088/1674-1056/24/10/107801

摘要

A multifunctional surface plasmon polariton disk device coupled by two metal–insulator–metal (MIM) waveguides is proposed and investigated numerically with finite-difference time-domain simulation. It can be used as optical switch and temperature sensor by filling disk with liquid crystal and ethanol, respectively. The simulation results demonstrate that the transmission characteristics of an optical switch can be manipulated by adjusting the radius of disk and the slit width between disk and MIM waveguides. The transmittance and modulation depth of optical switch at 1550 nm are up to 64.82%and 17.70 dB, respectively. As a temperature sensor, its figure of merit can reach 30.46. In this paper, an optical switch with better efficiency and a temperature sensor with better sensitivity can be achieved.