Optical waveguide behavior of Se-doped and undoped CdS one-dimensional nanostructures using near-field optical microscopy |
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| Authors: | Xiao Wang Dan Liu Anlian Pan Zheyu Fang Shan Huang and Xing Zhu |
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| Institution: | (1) State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing, 100871, China;(2) Micro-Nano Technologies Research Center, Hunan University, Changsha, 410082, China;(3) National Center for Nanoscience and Technology, Beijing, 100190, China |
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| Abstract: | The optical waveguide behaviors of CdS and CdS
x
Se1−x
nanostructures are studied using near-field optical microscopy. Optical measurements demonstrate that light may be guided
on sub-wavelength scales along CdS nanoribbons in straight or bent structures. The photoluminescence (PL) spectra from nanoribbon
emission using scanning near-field optical microscopy are analyzed under different incident laser intensities. The PL spectra
along Se-doped and undoped CdS nanoribbons at different propagation distances are investigated. Both the guided PL spectra
of Se-doped and undoped CdS nanoribbons show red-shifts because of the band-edge absorption. Our results are useful for the
development of new kinds of functional nano devices.
Supported by the National Natural Science Foundation of China (Grant Nos. 10574002, 90406007, and 50602015) and the National
Basic Research Program of China (Grant No. 2007CB936800) |
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| Keywords: | near-field optical microscopy one-dimensional nanostructure photoluminescence CdS |
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