Plasmonic Band-Pass Microfilters for LWIR Absorption Spectroscopy

Figure 1

Schematic of wavelength filter and microbolometer array. The upper view shows the entire structure to the extent of the input gratings. The inset, shows the waveguide cavity, microbolometer cavity, and the first few periods of the input grating. The first two periods of the input gratings can be seen on the left and right edges of the inset and the four periods of the output grating can be seen in the center of the inset.