CMOS Compatible Plasmonic Refractive Index Sensor based on Heavily Doped Silicon Waveguide

  • M. O. Faruque Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh
  • R. Al Mahmud Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh
  • R. H. Sagor Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh
Keywords: CMOS technology, heavily doped silicon, metal-insulator-metal, RI sensor

Abstract

In this study, a plasmonic refractive index (RI) sensor using heavily n-doped silicon waveguide is designed and numerically simulated using finite element method (FEM). The reported sensor is based on gratings inside a heavily doped silicon waveguide structure instead of a conventional metal-insulator-metal structure. This feature enables the device to overcome the limitations of conventional plasmonic devices like optical losses, polarization management, etc. Besides, it makes the device compatible with Complementary Metal Oxide Semiconductor (CMOS) technology and thus provides an easier way of practical fabrication and incorporation in integrated circuits. The presented sensor has a highest sensitivity of 1208.9nm/RIU and a resolution as small as 0.005 which is comparable with conventional plasmonic sensors reported to date. The main advantage of this plasmonic sensor is that it has a very simple structure and uses silicon instead of metal which provides an easier way of fabrication.

Author Biographies

M. O. Faruque, Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh

Department of Electrical and Electronic Engineering, Islamic University of Technology, Board Bazar, Dhaka- Mymensingh Highway, Gazipur 1704, Bangladesh

R. Al Mahmud, Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh

Department of Electrical and Electronic Engineering, Islamic University of Technology, Board Bazar, Dhaka- Mymensingh Highway, Gazipur 1704, Bangladesh

R. H. Sagor, Department of Electrical and Electronic Engineering, Islamic University of Technology, Bangladesh

Department of Electrical and Electronic Engineering, Islamic University of Technology, Board Bazar, Dhaka- Mymensingh Highway, Gazipur 1704, Bangladesh

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How to Cite
[1]
M. O. Faruque, R. Al Mahmud, and R. H. Sagor, “CMOS Compatible Plasmonic Refractive Index Sensor based on Heavily Doped Silicon Waveguide”, Eng. Technol. Appl. Sci. Res., vol. 10, no. 1, pp. 5295-5300, Feb. 2020.

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