Three-dimensional chiral photonic superlattices.
We investigate three-dimensional photonic superlattices composed of polymeric helices in various spatial checkerboard-like arrangements. Depending on the relative phase shift and handedness of the chiral building blocks, different circular-dichroism resonances appear or are suppressed. Samples corresponding to four different configurations are fabricated by direct laser writing. The measured optical transmittance spectra are in good agreement with numerical calculations.
Thiel
M
M
Institut für Angewandte Physik and DFG-Center for Functional Nanostructures (CFN),Karlsruhe Institute of Technology (KIT), D-76128 Karlsruhe, Germany. michael.thiel@physik.uni-karlsruhe.de
Fischer
H
H
von Freymann
G
G
Wegener
M
M