| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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In-Situ Characterization of Three-Dimensional Optical Matters by Light Diffraction |
| JIANG Lai-Dong1, DAI Qiao-Feng1, FENG Tian-Hua1, LIU Jin1, WU Li-Jun1, LAN Sheng1, A. V. Gopal2, V. A. Trofimov3 |
| 1Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 5100062Department of Condensed Matter Physics and Material Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005, India3Department of Computational Mathematics and Cybernetics, M. V. Lomonosov Moscow State University, Moscow 119992, Russia |
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| Cite this article: |
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JIANG Lai-Dong, DAI Qiao-Feng, FENG Tian-Hua et al 2009 Chin. Phys. Lett. 26 074201 |
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Abstract Three-dimensional optical matters are created by combining the single beam optical trapping with the conventional Z-scan technique. Dynamic light diffraction is employed to evaluate the structure and quality of the optical matter formed at the optimum trapping power. The lattice constant of the optical matter is extracted based on the Bragg and Snell laws, showing that polystyrene spheres are nearly close-packed in the optical matter, confirmed by comparing the diffraction pattern of the optical matter with that of a colloidal photonic crystal fabricated by the self-assembled technique. The relatively broad diffraction peaks observed in the optical matter indicate that the density of disorders in it is higher than that in the photonic crystal. It is suggested that the optical matter possesses a random close-packed structure rather than a face centered cubic one.
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42.70.Qs
87.80.Cc
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Received: 19 February 2009
Published: 02 July 2009
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