Light scattering from anisotropic block copolymer grains in a planar waveguide

Zhuangxi Fang, Maurice C. Newstein, Bruce Garetz, Jeffrey D. Wilbur, Nitash P. Balsara

Research output: Contribution to journalArticle

Abstract

A theory is presented to treat depolarized light scattering in a planar waveguide consisting of an ordered block copolymer thin film on a fused-silica substrate. In guided-wave depolarized light scattering (GWDLS), light is coupled into a transverse-magnetic mode of the film, which acts as a planar waveguide. Scattering of the incident light from randomly oriented, optically anisotropic grains results in the coupling of light into propagating transverse-electric (TE) modes in the sample. A dyadic Green's function approach is employed to derive a quantitative relationship between the total optical power of the scattered TE wave and the average size of the grains. The grain size thus calculated from GWDLS experiments is consistent with the position space results of atomic force microscopy.

Original languageEnglish (US)
Pages (from-to)1291-1297
Number of pages7
JournalJournal of the Optical Society of America B: Optical Physics
Volume24
Issue number6
DOIs
StatePublished - 2007

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block copolymers
light scattering
wave scattering
waveguides
dyadics
Green's functions
grain size
atomic force microscopy
silicon dioxide
thin films
scattering

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Light scattering from anisotropic block copolymer grains in a planar waveguide. / Fang, Zhuangxi; Newstein, Maurice C.; Garetz, Bruce; Wilbur, Jeffrey D.; Balsara, Nitash P.

In: Journal of the Optical Society of America B: Optical Physics, Vol. 24, No. 6, 2007, p. 1291-1297.

Research output: Contribution to journalArticle

Fang, Zhuangxi ; Newstein, Maurice C. ; Garetz, Bruce ; Wilbur, Jeffrey D. ; Balsara, Nitash P. / Light scattering from anisotropic block copolymer grains in a planar waveguide. In: Journal of the Optical Society of America B: Optical Physics. 2007 ; Vol. 24, No. 6. pp. 1291-1297.
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