Title :
Impact of metal nano-grating phase-shift on plasmonic MSM photodetectors
Author :
Das, Narottam ; Karar, Ayman ; Tan, Chee Leong ; Alameh, Kamal ; Lee, Yong Ak
Author_Institution :
Electron Sci. Res. Inst., Edith Cowan Univ., Joondalup, WA, Australia
Abstract :
In this paper, finite difference time-domain (FDTD) method is used to simulate the light absorption enhancement in a plasmonic metal-semiconductor-metal photodetector (MSM-PD) structure employing a metal nano-grating with phase-shifts. The metal fingers of the MSM-PDs are etched with appropriate depths to maximize light absorption through plasmonic effects into a subwavelength aperture. Simulation results show that the nano-grating phase-shift red-shifts the wavelength at which the light absorption enhancement maximum, and that the combined effects of the nano-grating groove shape and the nano-grating phase-shift, degrade the light absorption enhancement by up to 50%.
Keywords :
finite difference time-domain analysis; light absorption; metal-semiconductor-metal structures; nanophotonics; photodetectors; plasmonics; finite difference time-domain method; light absorption enhancement; metal nanograting phase-shift; nanograting groove shape; plasmonic metal-semiconductor-metal photodetector structure; subwavelength aperture; FDTD simulation; MSM-PDs; Subwavelength gratings; grating phase-shift; nanophotonics; plasmonic nanostructures; surface plasmon polaritons;
Conference_Titel :
High-Capacity Optical Networks and Enabling Technologies (HONET), 2010
Conference_Location :
Cairo
Print_ISBN :
978-1-4244-9922-9
DOI :
10.1109/HONET.2010.5715752
