Periodically patterned columnar thin films as Blazed gratings

Abstract

Periodically patterned columnar thin films (PP-CTFs) were made by evaporating CaF2 and directing the vapor flux obliquely towards lithographically fabricated micrometer/sub-micrometer gratings. The growth of the PP-CTFs was controlled by the deposition rate to form prismatic air cavities within them and they function like blazed diffraction gratings with asymmetric diffraction patterns and diffraction efficiencies upto 52% in transmission at visible wavelengths. Scalar diffraction theory qualitatively explained the measured diffraction efficiencies.

7 pages, 3 figures

References in corpus (1)

• Blending of nanoscale and microscale in uniform large-area sculptured thin-film architectures

Cited by in corpus (1)

• Asymmetric coupling and dispersion of surface-plasmon-polariton waves on a periodically patterned anisotropic metal film