title: Blue-shifting of circular Bragg phenomenon by annealing of chiral sculptured thin films.
abstract: The wavelength regime of the circular Bragg phenomenon, exhibited by chiral sculptured thin films fabricated using the serial bideposition technique, blue shifts as a result of post-deposition annealing. This blue shift can be attributed to the net effect of three material changes that occur during annealing: a small reduction in helical pitch, an increase in the relative permittivity of the column material changing from amorphous to crystalline, and a density reduction due to columnar thinning from the same amorphous-to-crystalline transition.
authors.forename: Sean M
authors.initials: SM
authors.lastname: Pursel
authors.forename: Mark W
authors.initials: MW
authors.lastname: Horn
authors.forename: Akhlesh
authors.initials: A
authors.lastname: Lakhtakia