Nanophase-Separated Polymer Films as High-Performance Antireflection Coatings
Stefan Walheim,
Erik Schäffer,
Jürgen Mlynek,
Ullrich Steiner
*
Optical surfaces coated with a thin layer to improve light
transmission are ubiquitous in everyday optical applications as well as
in industrial and scientific instruments. Discovered first in 1817 by
Fraunhofer, the coating of lenses became standard practice in the
1930s. In spite of intensive research, broad-band antireflection coatings are still limited by the lack of materials with low refractive indices. A method based on the phase separation of a macromolecular liquid to generate nanoporous polymer films is demonstrated that creates surfaces with high optical transmission.
Fakultät für Physik, Universität Konstanz,
D-78457 Konstanz, Germany.
www.uni-konstanz.de/FuF/Physik/Mlynek/Steiner/
*
To whom correspondence should be addressed. E-mail:
ulli.steiner{at}uni-konstanz.de