Tunable Sub-Wavelength Gratings

A sub-wavelength grating is a repeated structure with a pitch below the wavelength of visible light. The NIMBle structures are an example of such a grating. Recent experiments at the Department for Solid State Physics at Lund University have shown that the gratings reflect light wavelengths selectively, allowing color filtering, a common need in products such as projectors. The use of the NIMBle structure can provide an opportunity to make these tunable, by changing the periodicity of the grating by bending.