Premium
Enhancement of Surface‐Relief Gratings Recorded on Amphiphilic Liquid‐Crystalline Diblock Copolymer by Nanoscale Phase Separation
Author(s) -
Yu H.,
Okano K.,
Shishido A.,
Ikeda T.,
Kamata K.,
Komura M.,
Iyoda T.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200500346
Subject(s) - materials science , nanoscopic scale , annealing (glass) , grating , copolymer , holography , diffraction grating , refractive index , diffraction , optics , diffraction efficiency , amphiphile , optoelectronics , nanotechnology , polymer , composite material , physics
An amphiphilic liquid‐crystalline diblock copolymer can be used to record both refractive‐index and surface‐relief holographic gratings upon irradiation by two coherent laser beams. The diffraction behavior of the gratings is controlled by nanoscale phase separation on annealing. Surface relief is enhanced by almost an order of magnitude due to the pressure gradient produced in the process. The Figure shows a schematic of a grating structure before and after annealing.