Absorption enhancement of MSM photodetector structure with a plasmonic double grating structure

Author

Tan, Chee Leong ; Lysak, Volodymyr V. ; Das, Narottam ; Karar, Ayman ; Alameh, Kamal ; Lee, Yong Tak

Author_Institution

Sch. of Photon Sci. & Technol., Gwangju Inst. of Sci. & Technol. (GIST), Gwangju, South Korea

fYear

2010

fDate

17-20 Aug. 2010

Firstpage

849

Lastpage

853

Abstract

We present finite difference time domain simulation to analyze the optical absorption enhancement of metal-semiconductor-metal photo detectors employing double plasmonic grating structures. Simulation results show that the combination of a subwavelength aperture and double nano-structured metal grating results in up to 25 times enhancement in optical absorption, in comparison to MSM photodetector structures employing only a subwavelength aperture. This improvement of the absorption enhancement is due to the coupling out function of the bottom grating structure which distributes the light to both side of the subwavelength aperture.

Keywords

finite difference time-domain analysis; light absorption; metal-semiconductor-metal structures; nanostructured materials; photodetectors; plasmonics; double nanostructured metal grating; finite difference time domain simulation; metal-semiconductor-metal photodetector structure; optical absorption enhancement; plasmonic double grating structure; subwavelength aperture; FDTD simulation; MSM photo detectors; nanophotonics; plasmonic nano-gratings; surface plasmon polaritons;

fLanguage

English

Publisher

ieee

Conference_Titel

Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on

Conference_Location

Seoul

ISSN

1944-9399

Print_ISBN

978-1-4244-7033-4

Electronic_ISBN

1944-9399

Type

conf

DOI

10.1109/NANO.2010.5697989

Filename

5697989