Periodically patterned columnar thin films as blazed diffraction gratings

Jhuma Dutta, S. Anantha Ramakrishna, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


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. These PP-CTFs function like blazed diffraction gratings with asymmetric diffraction patterns and diffraction efficiencies up to 80 in transmission at ultraviolet-visible wavelengths. Diffraction theory adequately establishes that the blazing action arises due to the prismatic cavities and explains the measured diffraction efficiencies.

Original languageEnglish (US)
Article number161116
JournalApplied Physics Letters
Issue number16
StatePublished - Apr 22 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


Dive into the research topics of 'Periodically patterned columnar thin films as blazed diffraction gratings'. Together they form a unique fingerprint.

Cite this