Nanopatterning of photonic crystals with a photocurable silica–titania organic–inorganic hybrid material by a UV-based nanoimprint technique

Abstract

UV patternable high refractive index inorganic-organic hybrid materials prepared by sol-gel process can be nanoimprinted in order to get photonic crystal nanopatterns. Non-hydrolytic sol-gel process can make a UV curable and relatively high refractive index hybrid material, which can be cured without a significant shrinkage for nanoimprinting. Sol-gel process of heterogeneously functionalized silicon alkoxides can make the organically modified inorganic Si-O-Ti network very well. The UV-based nanoimprint technique utilizes transparent templates and UV curable high refractive index materials to allow pattern replication at room temperature and very low pressure. UV-based nanoimprint technique is an efficient way to fabricate this sort of polymeric photonic crystal nanostructures.

Three‐Dimensional Fluorescence Image Patterning of Network Aliphatic Polyester via Microtransfer Molding and Thermal Treatment

“…In practical application, this method has been applied to the preparation of optical waveguides and interferometers using microfeatures from organic polymers. [18][19][20] Moreover, the mTM method may also be applicable to the fluorescence image patterning of polymeric materials, with the added benefit of the formation of 3-D structures such as multilayered multichannels. Non-conjugated polymers, which involve aliphatic polyesters, intrinsically exhibit neither visible absorption nor fluorescence because of the forbidden transition due to the carbonyl group.…”

Dielectric Photonic Crystals

“…This approach has been used to successfully pattern a wide variety of simple and complex metal oxides [86]. A similar approach has been extended to novel materials including a reasonably high index (n = 1.623 at 633 nm) photocurable methacryl silica-titania resin [87], a luminescent titania sol-gel doped with europium chelates for light extraction, and polyacrylamide hydrogels [88].…”

Effect of forming conditions on linear patterning of polymer materials by hot embossing process

“…It is a technique in which microfluidic devices can be made with high precision, low cost, and high productivity. 1 This technique is utilized to fabricate micro-optical elements, 2 photonic crystals, 3,4 nano-scale friction, 5 flat display circuits, storage media, 6 and nano/micro fluidic channels. 7 The machining method to form the nanoscale structure by Mask-Less laser patterning is proposed by alknanethiolate self-assembled monolayers.…”