Abstract: A method for fabricating composite materials/devices comprising stacking together fibers or rods of at least two different materials and drawing the fibers or rods. Using this process, devices having nanoscale features can be readily fabricated.

Abstract: An artificial birefringent element having a repeating unit comprising at least first and second layers alternatively stacked, the first and second layers being formed of materials having different refractive indices.

Abstract: A method for fabricating composite materials/devices comprising stacking together fibers or rods of at least two different materials, and drawing the fibers or rods. Using this process, devices having nanoscale features can be readily fabricated.

Abstract: A surface relief hologram that includes two or more patterns, each pattern being sensitive to different radiation wavelengths. The hologram is made by defining relief features that are sensitive to different wavelengths, and in particular, to one wavelength that is visible to the unaided human eye and to one wavelength that is invisible to the unaided human eye. These relief features of different sensitivities are interspersed over the surface of the substrate in which the hologram is defined. By providing two patterns of different sensitivities, when the hologram is used in a security device, security is improved. Despite this improved security, the hologram can be mass manufactured using known techniques.