A microsphere assembly method with laser microwelding for fabrication of three-dimensional periodic structures

Kenta Takagi, Masanori Omote, Akira Kawasaki

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The orderly build-up of monosized microspheres with sizes of hundreds of micrometres enabled us to develop three-dimensional (3D) photonic crystal devices for terahertz electromagnetic waves. We designed and manufactured an original 3D particle assembly system capable of fabricating arbitrary periodic structures from these spherical particles. This method employs a pick-and-place assembling approach with robotic manipulation and interparticle laser microwelding in order to incorporate a contrivance for highly accurate arraying: an operation that compensates the size deviation of raw monosized particles. Pre-examination of particles of various materials revealed that interparticle laser welding must be achieved with local melting by suppressing heat diffusion from the welding area. By optimizing the assembly conditions, we succeeded in fabricating an accurate periodic structure with a diamond lattice from 400 νm polyethylene composite particles. This structure demonstrated a photonic bandgap in the terahertz frequency range.

Original languageEnglish
Article number035032
JournalJournal of Micromechanics and Microengineering
Volume20
Issue number3
DOIs
Publication statusPublished - 2010 Mar 12

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Mechanics of Materials
  • Mechanical Engineering
  • Electrical and Electronic Engineering

Fingerprint Dive into the research topics of 'A microsphere assembly method with laser microwelding for fabrication of three-dimensional periodic structures'. Together they form a unique fingerprint.

  • Cite this