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Quantum Confinement in InSb Microcrystallites Embedded in SiO2 Thin Films |
ZHU Kai-gui;SHI Jian-zhong;ZHANG Li-de |
Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031 |
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Cite this article: |
ZHU Kai-gui, SHI Jian-zhong, ZHANG Li-de 1998 Chin. Phys. Lett. 15 143-145 |
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Abstract Semiconductor InSb microcrystallites were embedded in SiO2 thin films by rf cosputtering technique. Structures of the thin films were characterized by transmission electron microscopy, x-ray diffraction, and x-ray photoelectron spectroscopy. Average size of the microcrystallites, depending on post-annealing temperature and time, is on the order of magnitude of nanometer. Absorption spectra of the films were measured and large blue shifts of absorption edge were observed in a wide range from 300 to 1500nm. The blue shifts were attributed to the quantum confinement effect and explained in the model of effective-mass approximation.
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Keywords:
81.15.Cd
61.46.+w
78.66.Jg
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Published: 01 February 1998
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