Title :
Design of high-sensitivity plasmonics-assisted GaAs metal-semiconductor-metal photodetectors
Author :
Karar, Ayman ; Das, Narottam ; Tan, Chee Leong ; Alameh, Kamal ; Lee, Yong Tak
Author_Institution :
Electron Sci. Res. Inst., Edith Cowan Univ., Joondalup, WA, Australia
Abstract :
In this paper, we use the finite difference timedomain (FDTD) method to optimize the light absorption of an ultrafast plasmonic GaAs metal-semiconductor-metal photodetector (MSM-PD) employing metal nano-gratings. The MSM-PD is optimized geometrically, leading to improved light absorption near the designed wavelength of GaAs through plasmon-assisted electric and magnetic field concentration through a subwavelength aperture. Simulation results show up to 10-times light absorption enhancement at 867 nm due to surface plasmon polaritons (SPPs) propagation through the metal nano-grating, in comparison to conventional MSM-PD.
Keywords :
III-V semiconductors; finite difference time-domain analysis; gallium arsenide; light absorption; photodetectors; plasmonics; polaritons; surface plasmons; GaAs; finite difference time domain method; high-sensitivity plasmonics-assisted metal-semiconductor-metal photodetectors; light absorption; surface plasmon polaritons propagation; Absorption; Apertures; Gallium arsenide; Gratings; Metals; Nanoscale devices; Plasmons; FDTD simulation; MSM-PD; Subwavelength aperture; 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.2010.5715761
