Research Article

Impact of Nanograting Phase-Shift on Light Absorption Enhancement in Plasmonics-Based Metal-Semiconductor-Metal Photodetectors

Figure 8

Light absorption enhancement factor spectra for trapezoidal-shaped nanograting with the aspect ratios of 0.8 (a) and 0.5 (b) for different nanograting phase shifts. In this case, the sub-wavelength aperture width was kept constant at 100 nm.