Self-assembled Block Copolymers as Two-Dimensional Photonic Band Gap Materials
Abstract
To form photonic band gaps in the visible regime, we synthesized monodisperse, high molecular weight poly(styrene-co-isoprene) and poly(a-methylstyrene-co-isoprene) using anionic living polymerization. By controlling the percentage of the two different blocks, we obtain self-assembled 2-D cylindrical photonic crystals. The polyisoprene block in poly(styrene-co-isoprene) can be decomposed by ozone irradiation. By heating poly(a-methylstyrene-co-isoprene) above 170 C, the poly(a-methylstyrene) block depolymerizes and the polyisoprene block cross-links. Thus, after removing the cylindrical phase in both block copolymers, air filled 2-D photonic structures are formed. Reflectivity versus wavelength results are compared with theoretical models.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2001
- Bibcode:
- 2001APS..MARD40134C