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
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
摘要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.
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.
JIANG Lai-Dong;DAI Qiao-Feng;FENG Tian-Hua;LIU Jin;WU Li-Jun;LAN Sheng;A. V. Gopal;V. A. Trofimov. In-Situ Characterization of Three-Dimensional Optical Matters by Light Diffraction[J]. 中国物理快报, 2009, 26(7): 74201-074201.
JIANG Lai-Dong, DAI Qiao-Feng, FENG Tian-Hua, LIU Jin, WU Li-Jun, LAN Sheng, A. V. Gopal, V. A. Trofimov. In-Situ Characterization of Three-Dimensional Optical Matters by Light Diffraction. Chin. Phys. Lett., 2009, 26(7): 74201-074201.
[1] Ashkin A et al 1986 Opt. Lett. 11 288 [2] Ashkin A 2006 Optical Trapping and Manipulation ofNeutral Particles Using Lasers (New Jersey: World Scientific) [3] Dufresne E R et al 1998 Rev. Sci. Instrum. 691974 Grier D G 2003 Nature 424 810 [4] Burn M M et al 1989 Phys. Rev. Lett. 63 1233 [5] Burn M M et al 1990 Science 249 749 [6] Inoue K and Ohtaka K (Eds.) 2004 Photonic Crystals:Physics, Fabrication, and Applications (Berlin: Springer) [7] Dai Q F et al 2008 Appl. Phys. Lett. 92 153111 [8] Liu J et al 2008 Appl. Phys. Lett. 92 233108 [9] F\"{orster S et al 2007 Nature Mater. 6 888 [10] Dux C and Versmold H 1997 Phys. Rev. Lett. 781811 [11] Amos R M et al 2000 Phys. Rev. E 61 2929 [12] Asher S A et al 2004 Phys. Rev. E 69 066619 [13] Dorado L A et al 2008 Phys. Rev. B 78 075102 [14] Tikhonov A et al 2008 Phys. Rev. B 77 235404 [15] Galisteo J F et al 2005 J. Opt. A: Pure Appl. Opt. 7 S244 [16] Cheng Z et al 2002 Phys. Rev. Lett. 88 015501 [17] Dai Q F et al 2009 Eur. Phys. Lett. 85 18004 [18] Yannopapas V et al 2001 Phys. Rev. Lett. 864811 [19] Zheng Z Y et al 2007 Appl. Phys. Lett. 90051910 [20] Feng T H et al 2008 Chin. Phys. B 17 4533 [21] A commercially available software developed by RsoftDesign Group (http://www.rsoftdesign.com) is used for the numericalsimulations.
2009, Vol. 26 
