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Absorption enhancement of 980 nm MSM photodetector with a plasmonic grating structure |
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| Authors: | Chee Leong Tan Kamal Alameh Yong Tak Lee |
| Affiliation: | a School of Photonics Science, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro (Oryong-dong), Buk-gu, Gwangju 500-712, Republic of Korea b Department of Information and Communications, GIST, Republic of Korea c Department of Nanobio Materials and Electronics, GIST, Republic of Korea d Electron Science Research Institute, Edith Cowan University, WA, Australia |
| Abstract: | We present finite-difference time-domain (FDTD) simulation to analyze the optical absorption enhancement of metal-semiconductor-metal (MSM) photodetectors employing plasmonic grating structures. Simulation results show that the combination of a subwavelength aperture and a nano-structured metal grating results in up to 16 times enhancement in optical absorption, in comparison to conventional MSM photodetector structures employing only a subwavelength aperture. |
| Keywords: | MSM photodetectors Surface plasmons Metal gratings FDTD simulation |
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