Core-shell photonic band gap structures fabricated using laser-assisted chemical vapor deposition

H. Wang, Y. F. Lu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Laser-assisted chemical vapor deposition (LCVD), in combination with three-dimensional (3D) self-assembly of colloidal silica particles, was used to fabricate 3D core-shell photonic band gap (PBG) structures. Self-assembled multilayer silica particles were formed on silicon substrates using the isothermal heating evaporation approach. A continuous-wave CO2 laser (10.6 μm wavelength) was used as the energy source in the LCVD to fabricate a silica-core-silicon-shell PBG structure. This technique is capable of fabricating structures with various PBGs by adjusting the silica particle size and Si-shell thickness using different LCVD parameters. This capability enables us to engineer positions and widths of PBGs by flexibly controlling the particle size and shell thicknesses. In the fabricated PBG structures, face-centered cubic structures consist of silica-core-silicon-shell "effective atoms." A series of PBG structures with designed PBGs was obtained under different experimental conditions. Incidence-angle-resolved spectroscopic ellipsometry was used to identify specific PBGs. The refractive indices of the effective atoms with different Si-shell thicknesses were calculated using the Bruggeman composite model. The plain-wave expansion method was used to simulate the photonic dispersion diagrams, which supported the experimental results.

Original languageEnglish (US)
Article number013113
JournalJournal of Applied Physics
Volume103
Issue number1
DOIs
StatePublished - Jan 22 2008

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vapor deposition
photonics
silicon dioxide
lasers
silicon
continuous wave lasers
energy sources
plains
elastic waves
engineers
ellipsometry
atoms
self assembly
incidence
adjusting
diagrams
evaporation
refractivity
heating
composite materials

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Core-shell photonic band gap structures fabricated using laser-assisted chemical vapor deposition. / Wang, H.; Lu, Y. F.

In: Journal of Applied Physics, Vol. 103, No. 1, 013113, 22.01.2008.

Research output: Contribution to journalArticle

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