In the light of the rigorous coupled wave theory and the equivalent medium theory

we propose a design and simulation method for an InN-based sub-wavelength grating guided-mode resonance filter structure in the visible spectral region and investigate the sensitivity of the filter reflection spectrum to thegrating parameters.When the filter high-peak reflectivity

low sideband and narrow linewidth remain unchanged

we change the grating period（ΔT =0

9

9.7nm）by a Micro-Electro-Mechanical-System（MEMS）comb actuator using its sensibility to the grating period in connection with the simulation

thus linearly controlling the resonant wavelength output in a tunable range of 23 nm and realizing aperiod-tunable reflective guided-mode resonance filter with the Full Width at Half Maximum（FWHM）smaller than 1.15 nm.