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Acoustic Excitations in a Self-Assembled Block Copolymer Photonic Crystal
- Source :
- Physical Review Letters. 90
- Publication Year :
- 2003
- Publisher :
- American Physical Society (APS), 2003.
-
Abstract
- High resolution Brillouin light scattering can sensitively detect acoustic phonons in concentrated solutions of a high molecular weight poly(styrene-b-isoprene) symmetric copolymer in toluene. This block copolymer lamellar forming system also possesses a photonic stop band in the visible spectrum. Based on the low but finite contrast in mechanical properties between the styrene and isoprene components and taking into account the geometrical characteristics of the layered microstructure, we calculate the acoustic band structure and represent the observed acousticlike and opticlike phonons.
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 90
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters
- Accession number :
- edsair.doi.dedup.....948a413177f015ff0f58e01bee82b338