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Keywords:

  • polydimethylsiloxane;
  • embossing;
  • proximity field nanopatterning;
  • phase shift lithography;
  • surface-enhanced Raman spectroscopy;
  • antireflective coatings

Abstract

The use of a decal transfer lithography technique to fabricate elastomeric stamps with triangular cross-sections, specifically triangular prisms and cones, is described. These stamps are used in demonstrations for several prototypical optical applications, including the fabrication of multiheight 3D photoresist patterns with near zero-width features using near-field phase shift lithography, fabrication of periodic porous polymer structures by maskless proximity field nanopatterning, embossing thin-film antireflection coatings for improved device performance, and efficient fabrication of substrates for surface-enhanced Raman spectroscopic sensing. The applications illustrate the utility of the triangular poly(dimethylsiloxane) decals for a wide variety of optics-centric applications, particularly those that exploit the ability of the designed geometries and materials combinations to manipulate light–matter interactions in a predictable and controllable manner.