Ayman Karar, Chee Leong Tan, Kamal Alameh, Yong Tak Lee, “Dielectric waveguide optimization for the enhancement of TE-polarization transmission of plasmonics-based MSM-PD”, Nanosystems: Physics, Chemistry, Mathematics, 2013, Volume 4, Issue 3,Pages <nobr>378

Dielectric waveguide optimization for the enhancement of TE-polarization transmission of plasmonics-based MSM-PD

Ayman Karar^a, Chee Leong Tan^b, Kamal Alameh^ac, Yong Tak Lee^bdc

^a Electron Science Research Institute, Edith Cowan University, AU
^b School of Photonics Science, Gwangju Institute of Science and Technology (GIST), Gwangju, Republic of Korea
^c Department of Nanobio Materials and Electronics, World Class University (WCU), GIST, Republic of Korea
^d Department of Information and Communications, GIST, Republic of Korea

Abstract: In this paper, we use the finite difference time-domain (FDTD) method to optimize the TE-polarized light transmission of a metal-semiconductor-metal photodetector (MSM-PD) employing a dielectric waveguide on top of metal nano-gratings. Simulation results demonstrate that the funneling transmission of the TE-polarized light through the nanoslit of the MSM-PD structure is highly dependent on the structure geometries, such as the waveguide and nano-grating heights. We also demonstrate that adding a dielectric waveguide layer on top of the nano-metal gratings supports both the TM- and TE polarizations, and enhances the light transmission for TE-polarization around 3-times in comparison with conventional plasmonics MSM- PD structures.

Keywords: FDTD simulation, MSM-PD, waveguide, plasmonics, nano-gratings, surface plasmon.

PACS: 42.25.Bs, 42.25.Ja, 73.50.Pz

Language: English