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Enhancement of optical activity of chiral sculptured thin films by suitable infiltration of void regions

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Abstract: Using a local homogenization approach which treats a chiral sculptured thin film (STF) as a two-phase composite material, we show here that the infiltration of the void regions with a material of higher refractive index results in the enhancement of the optical activity. If chiral STFs of a high-index infiltrant cannot be directly fabricated for some practical reason, then the scheme described here may provide an alternate route.
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Keywords: Sculptured thin films; composite materials; local homogenization; optical activity; structural chirality

Document Type: Original Article

Affiliations: Computational & Theoretical Materials Sciences Group (CATMAS), Department of Engineering Science & Mechanics, Pennsylvania State University, University Park, PA 16802-6812, USA

Publication date: 01 April 2001

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