Anisotropic resonant scattering from polymer photonic crystals.
Hyperspectral goniometry reveals anisotropic scattering which dominates the visual appearance of self-assembled polymer opals. The technique allows reconstruction of the reciprocal-space of nanostructures, and indicates that chain defects formed during shear-ordering are responsible for the anisotropy in these samples. Enhanced scattering with improving order is shown to arise from increased effective refractive index contrast, while broadband background scatter is suppressed by absorptive dopants.
Nanophotonics Centre, University of Cambridge, JJ Thomson Ave, Cambridge, CB3 0HE, UK. aih26@cam.ac.uk
Andrew I
AI
Haines
Chris E
CE
Finlayson
David R E
DR
Snoswell
Peter
P
Spahn
G Peter
GP
Hellmann
Jeremy J
JJ
Baumberg
D016880:Anisotropy; D003460:Crystallization / Q000379:methods*; D008027:Light; D008968:Molecular Conformation; D017785:Photons; D011108:Polymers / Q000737:chemistry*; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
D011108:Polymers