Fig. 1
From: Nano-structured transmissive spectral filter matrix based on guided-mode resonances
a Schematic of the transmissive guided-mode resonance (GMR) filter structure, containing the waveguide and buffer layer on a quartz substrate. The metal gratings are located on the top. By controlling the grating periods, the peak wavelength of transmitted light spectra can be varied. b is a simulated filter transmission spectrum based on aluminum with defined structural parameters listed in the figure. The inset is a front view of the GMR filter