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

Figure 9

Maximum light absorption enhancement factor versus the grating phase shift for rectangular and trapezoidal (aspect ratios are 0.8 and 0.5) shaped nanograting geometries. In this case, the subwavelength aperture width was kept constant at 100 nm.