Fabrication of photonic crystal templates using holographic optical tweezers and adhesion via entropic attraction

DC Benito, DM Carberry, J Hildmann, EG Edwards, SH Simpson, GM Gibson, MJ Padgett, JG Rarity, M Kuball, MJ Miles, S Hanna

Research output: Contribution to journalArticle (Academic Journal)

Abstract

In suspensions containing microspheres and a sub-micron species, such as nanoparticles or a polymer, an attractive force can result between the microspheres. This attraction arises due to an entropic interaction, often referred to as a depletion force. In this work we demonstrate an application of the depletion force to the controlled assembly of crystalline templates for the production of photonic band gap (PBG) materials. The method makes use of holographic optical tweezers to assemble crystalline arrays of silica or polystyrene microspheres, in which depletion interactions are used to stabilise the structures being built. In addition, we use the holographic optical tweezers to characterise the attraction between pairs of microspheres in the system.
Translated title of the contributionFabrication of photonic crystal templates using holographic optical tweezers and adhesion via entropic attraction
Original languageEnglish
Pages (from-to)70380K-1 - 70380K-9
Number of pages9
JournalProceedings of SPIE
Volume7038
DOIs
Publication statusPublished - 2008

Bibliographical note

Name and Venue of Conference: Optical Trapping and Optical Micromanipulation V, San Diego, CA
Conference Organiser: SPIE

Structured keywords

  • CDTR

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