Sculptured Thin Films: Accomplishments and Emerging Uses

Details Sculptured Thin Films: Accomplishments and Emerging Uses Sculptured Thin Films: Accomplishments and Emerging Uses

2001-12-05

arxiv.org/abs/cond-mat/0112070v1

Materials Science and Engineering C, Vol. 19, pp. 427-434 (2002)

Physics

Condensed Matter

Materials Science

14 pages, accepted for publication in Materials Science and Engineering C

Scientific paper

Sculptured thin films (STFs) are nano-engineered materials whose columnar morphology is tailored to elicit desired optical responses upon excitation. Two canonical forms of STFs have been identified. Linear constitutive relations for general STFs as unidirectionally nonhomogeneous (continuously or piecewise uniformly) and locally bianisotropic continuums are presented, along with a 4$\times$4 matrix ordinary differential equation for wave propagation therein. A nominal model for the macroscopic properties of linear STFs is devised from nanoscopic considerations. The accomplished implementation of STFs as circular polarization filters and spectral hole filters is discussed, as also are emerging applications such as bioluminescence sensors and optical interconnects.

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