Document Detail

Constructing 3D crystal templates for photonic band gap materials using holographic optical tweezers.
MedLine Citation:
PMID:  18711539     Owner:  NLM     Status:  MEDLINE    
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 microm 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.
D C Benito; D M Carberry; S H Simpson; G M Gibson; M J Padgett; J G Rarity; M J Miles; S Hanna
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Optics express     Volume:  16     ISSN:  1094-4087     ISO Abbreviation:  Opt Express     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-19     Completed Date:  2008-10-06     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  101137103     Medline TA:  Opt Express     Country:  United States    
Other Details:
Languages:  eng     Pagination:  13005-15     Citation Subset:  IM    
HH Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL, UK.
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MeSH Terms
Crystallization / methods*
Equipment Design
Equipment Failure Analysis
Holography / methods*
Materials Testing
Optical Tweezers*
Optics and Photonics / instrumentation*
Polystyrenes / chemistry*
Silicon Dioxide / chemistry*
Reg. No./Substance:
0/Polystyrenes; 7631-86-9/Silicon Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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