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Article
Analysis of nano-grating-assisted light absorption enhancement in metal-semiconductor-metal photodetectors patterned using focused ion-beam lithography
ECU Publications 2011
  • Narottam K Das, Edith Cowan University
  • Ayman Karar, Edith Cowan University
  • Mikhail Vasiliev, Edith Cowan University
  • Chee Leong Tan
  • Kamal Alameh, Edith Cowan University
  • Yong Tak Lee
Publication Date
1-1-2011
Document Type
Journal Article
Publisher
Elsevier
Faculty
Faculty of Computing, Health and Science
School
Electron Science Research Institute (ESRI)
RAS ID
12556
Comments

Originally published as: Das, N., Karar, A., Vasiliev, M., Tan, C.L., Alameh, K., & Lee, Y.T. (2011). Analysis of nano-grating-assisted light absorption enhancement in metal–semiconductor–metal photodetectors patterned using focused ion-beam lithography. Optics Communications, 284, (6), 1694–1700. Original article available here

Abstract
We present finite-difference time-domain (FDTD) analysis results of light absorption enhancement factor dependence on the profile shape of nano-gratings etched into the surfaces of metal–semiconductor–metal photodetector (MSM-PD) structures. The MSM-PDs patterned by nano-gratings are optimized geometrically, improving the light absorption near the design wavelength through plasmon-assisted electric field concentration effects. FDTD simulation results show about 50 times light absorption enhancement prediction for 850 nm light due to improved optical signal propagation through the nano-gratings in comparison with the conventional MSM-PD designs employing only a subwavelength aperture. We also report on the nano-grating profile shapes obtained typically in our experiments using focused ion-beam lithography and discuss the dependency of light absorption enhancement on the geometric parameters of nano-gratings inscribed into MSM-PDs. --------------------------------------------------------------------------------
Disciplines
DOI
10.1016/j.optcom.2010.11.065
Citation Information
Narottam K Das, Ayman Karar, Mikhail Vasiliev, Chee Leong Tan, et al.. "Analysis of nano-grating-assisted light absorption enhancement in metal-semiconductor-metal photodetectors patterned using focused ion-beam lithography" (2011)
Available at: http://works.bepress.com/mikhail_vasiliev/3/