Light absorption enhancement in metal-semiconductor-metal photodetectors using plasmonic nanostructure gratings

Author

Das, Narottam ; Tan, Chee Leong ; Lysak, Volodymyr V. ; Alameh, Kamal ; Lee, Yong Tak

Author_Institution

Electron Sci. Res. Inst., Edith Cowan Univ., Perth, WA, Australia

fYear

2009

Firstpage

86

Lastpage

90

Abstract

In this paper, we adopt the finite difference time-domain (FDTD) method to optimize the absorption of a novel metal-semiconductor-metal photodetector (MSM-PD) structure based on the use of a double-layer nanostructured metal grating. The metal fingers of the MSM-PDs are etched with appropriate depths to maximize light absorption through plasmonic effects. Simulation results show 40 times enhancement in 980 nm light trapping due to extraordinary optical signal propagation through the nanostructured double-metal grating, in comparison to conventional MSM-PDs.

Keywords

diffraction gratings; finite difference time-domain analysis; light absorption; metal-semiconductor-metal structures; nanophotonics; photodetectors; polaritons; surface plasmons; extraordinary optical signal propagation; finite difference time-domain method; light absorption enhancement; light trapping; metal-semiconductor-metal photodetectors; nanophotonics; nanostructured double-metal grating; optical signal propagation; plasmonic nanostructure gratings; surface plasmon polaritons; Absorption; Charge carrier processes; Etching; Fingers; Finite difference methods; Gratings; Optimization methods; Photodetectors; Plasmons; Time domain analysis; FDTD simulation; MSM-PDs; Subwavelength gratings; nanophotonics; plasmonic nanostructures; surface plasmon polaritons;

fLanguage

English

Publisher

ieee

Conference_Titel

High-Capacity Optical Networks and Enabling Technologies (HONET), 2009 6th International Symposium on

Conference_Location

Alexandria

Print_ISBN

978-1-4244-5992-6

Type

conf

DOI

10.1109/HONET.2009.5423095

Filename

5423095