Title :
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
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;
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
DOI :
10.1109/HONET.2009.5423095
