Formation of free-standing micropyramidal colloidal crystals grown on silicon substrate

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Title: Formation of free-standing micropyramidal colloidal crystals grown on silicon substrate
Author(s): Matsuo, Shigeki; Fujine, Takatomi; Fukuda, Koichi; Juodkazis, Saulius; Misawa, Hiroaki
Abstract: The self-organization of microspheres is one of the simplest methods for fabricating three-dimensional (3D) photonic crystals (PhCs), but the 3D structure of such organized microspheres, colloidal crystals, is difficult to control. In this letter, we report a method for forming face-centered-cubic colloidal crystals into a pyramidal shape on an anisotropically etched silicon (100) and (110) substrate. The colloidal crystals were lifted from the substrate for observation after thermal bonding. Free-standing colloidal crystals with a well-defined 'micropyramid' shape were obtained. This type of PhC formation is suitable for batch production as well as for handling a single pyramid.
Publication type: Journal article
Source: Applied Physics Letters, Vol. 82, no. 24 (Jun 2003), pp. 4283-4285
Publication year: 2003
FOR Code(s): 02 Physical Sciences; 09 Engineering
Keyword(s): Colloidal crystals; Micropyramidal shape; Silicon substrates; Three-dimensional photonic crystals
Publisher: American Institute of Physics
ISSN: 0003-6951
Publisher URL: http://dx.doi.org/10.1063/1.1583138
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