Measurement of complex optical susceptibility for individual carbon nanotubes by elliptically polarized light excitation

Fengrui Yao, Can Liu, Cheng Chen, Shuchen Zhang, Qiuchen Zhao, Fajun Xiao, Muhong Wu, Jiaming Li, Peng Gao, Jianlin Zhao, Xuedong Bai, Shigeo Maruyama, Dapeng Yu, Enge Wang, Zhipei Sun, Jin Zhang, Feng Wang and Kaihui Liu ()
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Fengrui Yao: Peking University
Can Liu: Peking University
Cheng Chen: Peking University
Shuchen Zhang: Peking University
Qiuchen Zhao: Peking University
Fajun Xiao: Northwestern Polytechnical University
Muhong Wu: Peking University
Jiaming Li: Peking University
Peng Gao: Peking University
Jianlin Zhao: Northwestern Polytechnical University
Xuedong Bai: Chinese Academy of Sciences
Shigeo Maruyama: The University of Tokyo
Dapeng Yu: Southern University of Science and Technology
Enge Wang: Peking University
Zhipei Sun: Aalto University
Jin Zhang: Peking University
Feng Wang: University of California at Berkeley
Kaihui Liu: Peking University

Nature Communications, 2018, vol. 9, issue 1, 1-6

Abstract: Abstract The complex optical susceptibility is the most fundamental parameter characterizing light-matter interactions and determining optical applications in any material. In one-dimensional (1D) materials, all conventional techniques to measure the complex susceptibility become invalid. Here we report a methodology to measure the complex optical susceptibility of individual 1D materials by an elliptical-polarization-based optical homodyne detection. This method is based on the accurate manipulation of interference between incident left- (right-) handed elliptically polarized light and the scattering light, which results in the opposite (same) contribution of the real and imaginary susceptibility in two sets of spectra. We successfully demonstrate its application in determining complex susceptibility of individual chirality-defined carbon nanotubes in a broad optical spectral range (1.6–2.7 eV) and under different environments (suspended and in device). This full characterization of the complex optical responses should accelerate applications of various 1D nanomaterials in future photonic, optoelectronic, photovoltaic, and bio-imaging devices.

Date: 2018
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DOI: 10.1038/s41467-018-05932-9

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