The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 28, 2004
Filed:
Aug. 20, 2003
Richard M Amos, QinetiQ Malvern, GB;
Paul R Tapster, QinetiQ Malvern, GB;
John G Rarity, QinetiQ Malvern, GB;
Terence J Shepherd, QinetiQ Malvern, GB;
Stephen C Kitson, Bristol, GB;
Qinetiq Limited, Farnborough, GB;
Abstract
A method of growing robust large area colloidal photonic crystals and devices produced thereby. A suspension of monosized colloidal spheres ( ) is subjected to a composite shear ( ) by applying a sequential set of shearing forces. The crystalline layers within the colloid experience shearing forces with components in both x and y directions, forcing the colloid into a singe face-centered-cubic structure in preference to a twinned face-centered-cubic structure. The method may also comprise the use of a dispersion medium which is capable of undergoing a controllable phase change from a liquid phase to a solid phase. The crystal may be fixed into a single face-centered cubic structure.