Blu-Ray patterning Bragg SPPs R2R UV-NIL SmartNIL T-NIL Technology: general issues UV-NIL UV-curable polymers angle of incidence anisotropy biomimetic surface biomimetics click chemistry contact angle defect avoidance durability el-T-NIL el-UV-NIL formulation development grating guiding chart high aspect ratio micro-structure hydrodynamic instabilities inorganic-organic hybrid polymer large-area patterning line and space master morpho butterfly nanoimprint lithography nanoimprint lithography (NIL)