Title :
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
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;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2010 10th IEEE Conference on
Conference_Location :
Seoul
Print_ISBN :
978-1-4244-7033-4
Electronic_ISBN :
1944-9399
DOI :
10.1109/NANO.2010.5697989
