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Chin. Phys. B, 2015, Vol. 24(10): 107801    DOI: 10.1088/1674-1056/24/10/107801

Multifunctional disk device for optical switch and temperature sensor

Bian Zhen-Yu, Liang Rui-Sheng, Zhang Yu-Jing, Yi Li-Xuan, Lai Gen, Zhao Rui-Tong
Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
Abstract  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.
Keywords:  surface plasmon polaritons      optical switch      modulation depth      temperature sensor      figure of merit  
Received:  19 January 2015      Revised:  18 May 2015      Published:  05 October 2015
PACS:  78.67.-n (Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)  
  78.20.Bh (Theory, models, and numerical simulation)  
  78.15.+e (Optical properties of fluid materials, supercritical fluids and liquid crystals)  
  78.30.cb (Organic liquids)  
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61275059 and 61307062).
Corresponding Authors:  Liang Rui-Sheng     E-mail:

Cite this article: 

Bian Zhen-Yu, Liang Rui-Sheng, Zhang Yu-Jing, Yi Li-Xuan, Lai Gen, Zhao Rui-Tong Multifunctional disk device for optical switch and temperature sensor 2015 Chin. Phys. B 24 107801

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