Periodically patterned columnar thin films as Blazed gratings

Autor:	Dutta, Jhuma, Ramakrishna, S. Anantha, Lakhtakia, Akhlesh
Rok vydání:	2012
Předmět:	Physics - Optics
Druh dokumentu:	Working Paper
DOI:	10.1063/1.4802975
Popis:	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. Comment: 7 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1209.5264 Zobrazit plný text záznamu View this record from Arxiv