Strain-tunable optical microlens arrays with deformable wrinkles for spatially coordinated image projection on a security substrate.

ABSTRACT: As a new concept in materials design, a variety of strategies have been developed to fabricate optical microlens arrays (MLAs) that enable the miniaturization of optical systems on the micro/nanoscale to improve their characteristic performance with unique optical functionality. In this paper, we introduce a cost-effective and facile fabrication process on a large scale up to ~15 inches via sequential lithographic methods to produce thin and deformable hexagonally arranged MLAs consisting of polydimethylsiloxane (PDMS). Simple employment of oxygen plasma treatment on the prestrained MLAs effectively harnessed the spontaneous formation of highly uniform nanowrinkled structures all over the surface of the elastomeric microlenses. With strain-controlled tunability, unexpected optical diffract

SUBMITTER: Choi IS 

PROVIDER: S-EPMC9474807 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature