Periodically patterned columnar thin films as blazed diffraction gratings

Jhuma Dutta; S. Anantha Ramakrishna; Akhlesh Lakhtakia

doi:10.1063/1.4802975

Periodically patterned columnar thin films as blazed diffraction gratings

Jhuma Dutta, S. Anantha Ramakrishna, Akhlesh Lakhtakia

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

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. 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 language	English (US)
Article number	161116
Journal	Applied Physics Letters
Volume	102
Issue number	16
DOIs	https://doi.org/10.1063/1.4802975
State	Published - Apr 22 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4802975

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title = "Periodically patterned columnar thin films as blazed diffraction 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. 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.",

author = "Jhuma Dutta and {Anantha Ramakrishna}, S. and Akhlesh Lakhtakia",

note = "Funding Information: The authors thank H. Wanare (IIT Kanpur) for discussions and the Nanoscience Centre at IIT Kanpur for providing FESEM facilities. J.D. and S.A.R. acknowledge funding by the CSIR, India under Grant No. 03(1161)/10/EMR-II. J.D. thanks UGC, India for a fellowship and A.L. thanks the Binder Endowment at Penn State for partial financial support.",

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AU - Anantha Ramakrishna, S.

AU - Lakhtakia, Akhlesh

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PY - 2013/4/22

Y1 - 2013/4/22

N2 - 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.

AB - 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.

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Periodically patterned columnar thin films as blazed diffraction gratings

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