Temperature-dependent terahertz conductivity of tin oxide nanowire films

Xingquan Zou; Jingshan Luo; Dongwook Lee; Chuanwei Cheng; Daniel Springer; Saritha K. Nair; Siew Ann Cheong; Hong Jin Fan; Elbert E.M. Chia

doi:10.1088/0022-3727/45/46/465101

Temperature-dependent terahertz conductivity of tin oxide nanowire films

Xingquan Zou^*, Jingshan Luo, Dongwook Lee, Chuanwei Cheng, Daniel Springer, Saritha K. Nair, Siew Ann Cheong, Hong Jin Fan, Elbert E.M. Chia

^*Corresponding author for this work

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

40 Citations (Scopus)

Abstract

Temperature-dependent terahertz conductivity of tin oxide (SnO ₂) nanowire films was measured from 10 to 300K using terahertz time-domain spectroscopy. The optical parameters, including the complex refractive index, optical conductivity and dielectric function, were obtained using a simple effective medium theory. The complex conductivity was fitted with the Drude-Smith model and the plasmon model. The results show that the carrier density (N) and plasmon resonance frequency (ω ₀) increase while the scattering time decreases with increasing temperature. The reduced carrier mobility compared with bulk SnO ₂ indicates the presence of carrier localization or trapping in these nanowires.

Original language	English
Article number	465101
Journal	Journal Physics D: Applied Physics
Volume	45
Issue number	46
DOIs	https://doi.org/10.1088/0022-3727/45/46/465101
Publication status	Published - Nov 21 2012
Externally published	Yes

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

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title = "Temperature-dependent terahertz conductivity of tin oxide nanowire films",

abstract = "Temperature-dependent terahertz conductivity of tin oxide (SnO 2) nanowire films was measured from 10 to 300K using terahertz time-domain spectroscopy. The optical parameters, including the complex refractive index, optical conductivity and dielectric function, were obtained using a simple effective medium theory. The complex conductivity was fitted with the Drude-Smith model and the plasmon model. The results show that the carrier density (N) and plasmon resonance frequency (ω 0) increase while the scattering time decreases with increasing temperature. The reduced carrier mobility compared with bulk SnO 2 indicates the presence of carrier localization or trapping in these nanowires.",

author = "Xingquan Zou and Jingshan Luo and Dongwook Lee and Chuanwei Cheng and Daniel Springer and Nair, {Saritha K.} and Cheong, {Siew Ann} and Fan, {Hong Jin} and Chia, {Elbert E.M.}",

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doi = "10.1088/0022-3727/45/46/465101",

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T1 - Temperature-dependent terahertz conductivity of tin oxide nanowire films

AU - Zou, Xingquan

AU - Luo, Jingshan

AU - Lee, Dongwook

AU - Cheng, Chuanwei

AU - Springer, Daniel

AU - Nair, Saritha K.

AU - Cheong, Siew Ann

AU - Fan, Hong Jin

AU - Chia, Elbert E.M.

PY - 2012/11/21

Y1 - 2012/11/21

N2 - Temperature-dependent terahertz conductivity of tin oxide (SnO 2) nanowire films was measured from 10 to 300K using terahertz time-domain spectroscopy. The optical parameters, including the complex refractive index, optical conductivity and dielectric function, were obtained using a simple effective medium theory. The complex conductivity was fitted with the Drude-Smith model and the plasmon model. The results show that the carrier density (N) and plasmon resonance frequency (ω 0) increase while the scattering time decreases with increasing temperature. The reduced carrier mobility compared with bulk SnO 2 indicates the presence of carrier localization or trapping in these nanowires.

AB - Temperature-dependent terahertz conductivity of tin oxide (SnO 2) nanowire films was measured from 10 to 300K using terahertz time-domain spectroscopy. The optical parameters, including the complex refractive index, optical conductivity and dielectric function, were obtained using a simple effective medium theory. The complex conductivity was fitted with the Drude-Smith model and the plasmon model. The results show that the carrier density (N) and plasmon resonance frequency (ω 0) increase while the scattering time decreases with increasing temperature. The reduced carrier mobility compared with bulk SnO 2 indicates the presence of carrier localization or trapping in these nanowires.

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Temperature-dependent terahertz conductivity of tin oxide nanowire films

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