Title :
Nano-structured metal-semiconductor-metal photo-detectors for enhanced light absorption
Author :
Das, Niladri ; Masouleh, Farzaneh Fadakar ; Mashayekhi, Hamid Reza
Author_Institution :
Dept. of Electr. & Comput. Eng., Curtin Univ., Perth, WA, Australia
Abstract :
Nano-structured metal-semiconductor-metal photodetectors (MSM-PDs) are enable to assist in future high-speed communication devices achieving high responsivity-bandwidth characteristics. Finite difference time-domain (FDTD) method is used to calculate the light absorption enhancement of nano-grating assisted MSM-PDs near the design wavelength by varying detector´s geometrical parameters in comparison with a conventional device. The substrate containing apertures and the nano-gratings are optimized in thickness to trigger extraordinary optical transmission. Besides, it demonstrates how the coupling condition satisfies the oscillating charge densities evolution to the surface plasmon polaritons under illumination of polarized light. The simulation results confirm that the light absorption enhancement of nano-grating assisted MSM-PDs is ~13.5-times better than the conventional MSM-PDs.
Keywords :
diffraction gratings; finite difference time-domain analysis; light absorption; light transmission; metal-semiconductor-metal structures; nanophotonics; photodetectors; plasmonics; polaritons; surface plasmons; enhanced light absorption; extraordinary optical transmission; finite difference time-domain method; light absorption enhancement; nanograting assisted MSM-PD; nanogratings; nanostructured metal-semiconductor-metal photodetector; polarized light; substrate containing aperture; surface plasmon polariton; thickness optimization; FDTD simulation; Light absorption; Nano-structured MSM-PDs; Surface plasmon polariton;
Conference_Titel :
Computers and Devices for Communication (CODEC), 2012 5th International Conference on
Conference_Location :
Kolkata
Print_ISBN :
978-1-4673-2619-3
DOI :
10.1109/CODEC.2012.6509294
