Near-Infrared Reflection Spectra of Copper Nanowire Array Structures

Abstract:

We present a detailed study on near-infrared (NIR) reflection spectra of Cu nanowire arrays (NWAs) which are embedded in porous anodic alumina oxide templates and with pore diameters from 35 nm to 80 nm. We find that the NIR reflection of these samples is out of the frequency regime for surface-plasmon resonance induced by intra-and inter-band excitations. However, the intensity of the NIR reflection of Cu NWAs depends strongly on sample parameters and temperature. The measurements are carried out at temperatures setting to be 4 K, 77 K, 200 K, and at room temperature. The optical response of the Cu NWAs in NIR bandwidth is attributed to localized surface-plasmon oscillations and the NIR reflectance increases with temperature up to room-temperature. The physical mechanisms behind these interesting findings are discussed.

• Periodical: Advanced Materials Research (Volume 1118)
• Pages: 125-128
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1118.125
• Online since: July 2015
• Authors: Wen Li Dou, Wen Xu*, Shao Hui Xu, Guang Tao Fei, Yi Ming Xiao
• Keywords: Nanowire Array, Near-Infrared, Optical Properties, Temperature Dependence

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