Answers are grounded in this paper and cite their sources.
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.
No takes yet. Share an insight, caveat, or question.
Yu et al. (2005) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: