Light absorption and reflection in nanostructured GaAs metal-semiconductor-metal photodetectors
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Nanostructured metal–semiconductor–metal photodetectors (MSM-PDs) can assist in future high-speed communication devices for achieving high responsivity-bandwidth characteristics. We numerically evaluate the periodic nanotextured structures that provide for the confinement of light and concentration of energy near the designed wavelength, a feature attributed to surface plasmon polaritons. This plasmonic-based miniaturization provides a new approach to investigate remarkable optical properties of nanoscale device structuring.Afinite-difference timedomainmethod is used to calculate the maximum light absorption and reflection of nanograting-assisted MSM-PDs by varying detector’s physical parameters in comparison with a conventionaldevice. The horizontal and vertical surface resonances are identified as the key mechanisms to excite the surface waves with the aid of normally incident TM-polarized light. The extraordinaryoptical transmission is notably enhanced by optimizing the grating parameters and light incident angles. The simulation results are presented for light absorption and reflection in the subwavelengthregion of nanograting-assisted MSM-PDs compared with the conventional MSM-PDs.
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Optimization of light transmission efficiency for nano-grating assisted MSM-PDs by varying physical parametersMasouleh, F.; Das, Narottam; Mashayekhi, H. (2014)Metal–semiconductor–metal photodetectors (MSM-PDs) are utilized for suitable nano-structured fabrications that can play an important role for the development of future high-speed devices to achieve very high responsivit ...
Das, Narottam; Masouleh, F.; Mashayekhi, H. (2012)Nano-structured metal-semiconductor-metal photodetectors (MSM-PDs) are enable to assist in future high-speed communication devices achieving high responsivity-bandwidth characteristics. Finite difference time-domain (FDTD) ...
Comparison of different plasmonic nanograting profiles for quality light absorption in nanostructured metal-semiconductor-metal photodetectorsMasouleh, F.; Das, Narottam; Mashayekhi, H. (2013)We have demonstrated the possibility of quality light absorption in plasmonic nanostructured metal-semiconductor-metal (MSM) photodetectors with different groove shapes and analyzed the device performance by varying the ...