Abstract: An apparatus includes an optical element that has an optical metasurface including meta-atoms. In some instances, at least some of the meta-atoms have a first height and others of the meta-atoms have a second height that differs from the first height. In some instances, each meta-atom has a cross-section composed of a first metamaterial surrounded laterally by a second different metamaterial. Techniques for manufacturing such optical elements also are disclosed.

Abstract: A method includes pressing a face of a stamp into a first portion of a replication material disposed on a substrate, to cause the replication material to have a predetermined characteristic, exposing the first portion of the replication material to illumination, to modify the first portion of the replication material, and subsequently removing a second portion of the replication material that was not exposed to the illumination. An optical device includes a substrate, a portion of replication material disposed on a first surface of the substrate, the portion of replication material forming one or more diffractive optical elements, and a masking layer disposed on a second surface of the substrate, the second surface being opposite the first surface, in which a sidewall of the replication material has a straight profile, and in which the masking layer defines an aperture aligned with the portion of the replication material.

Abstract: There is provided a multi-layered coating having a plurality of cavities therein, the multi-layered coating comprises a first layer comprising an oxide-containing polymer; and a second layer disposed on said first layer, said second layer comprising an oxide. There is also provided a process for forming such multi-layered coating, an article comprising the multi-layered coating and uses thereof.

Abstract: This application relates to an anti-stiction flexible mold comprising a layer of an anti-stiction silicon dioxide deposited onto a flexible substrate. There is also provided a method for fabricating an anti-stiction flexible mold comprising the steps of a) depositing a layer of silicon dioxide on a flexible substrate; and b) interacting the layer of silicon dioxide with an anti-stiction agent to form the anti-stiction flexible mold. The resulting anti-stiction flexible mold may have superior anti-stick properties and may enable easy separation of mold and substrates after imprinting.

Abstract: This invention relates to a UV-curable coating material comprising an organosilica compound such as POSS or octahedral oligomeric silsesquioxane which is functionalized with a UV-curable functional group. The material further comprises at least one UV-curable cross-linker. The coating material comprises surface structures in the nano-sized range and can be used in a nanoimprint coating process where the material is coated on a substrate such as glass and a mold is pressed against the material to form an imprint before curing by UV radiation.

Abstract: This invention relates to a UV-curable coating material comprising an organosilica compound such as POSS or octahedral oligomeric silsesquioxane which is functionalized with a UV-curable functional group. The material further comprises at least one UV-curable cross-linker. The coating material comprises surface structures in the nano-sized range and can be used in a nanoimprint coating process where the material is coated on a substrate such as glass and a mold is pressed against the material to form an imprint before curing by UV radiation.