The fabrication and investigation of thin subwavelength transmission gratings made of high refractive index material on silica substrates are reported. For a normal incident light, in addition to large birefringence, strong polarization effects were observed. Both polarization and birefringence effects depend on the ratio of grating period to wavelength, having the largest variation when the period is near half of the wavelength. The largest transmission difference for the polarization parallel and perpendicular to the grating fingers is 12 dB; the largest phase difference is 170°.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)