期刊
OPTICS EXPRESS
卷 16, 期 17, 页码 13005-13015出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.16.013005
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资金
- Research Councils UK
- Engineering and Physical Sciences Research Council [EP/C523687/1] Funding Source: researchfish
A simple and robust method is presented for the construction of 3-dimensional crystals from silica and polystyrene microspheres. The crystals are suitable for use as templates in the production of three-dimensional photonic band gap (PBG) materials. Manipulation of the microspheres was achieved using a dynamic holographic assembler (DHA) consisting of computer controlled holographic optical tweezers. Attachment of the microspheres was achieved by adjusting their colloidal interactions during assembly. The method is demonstrated by constructing a variety of 3-dimensional crystals using spheres ranging in size from 3 mu m down to 800 nm. A major advantage of the technique is that it may be used to build structures that cannot be made using self-assembly. This is illustrated through the construction of crystals in which line defects have been deliberately included, and by building simple cubic structures. (C) 2008 Optical Society of America.
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