Abstract
In this study, porous PMMA materials are investigated to attain millimeter-wave (MMW) and/or terahertz-wave (THz) LC control devices. The porous materials can be obtained by dissolving PMMA to the ethanol:water (80:20vol%) solvent and make it possible to obtain very large sample and extremely thick LC layer. Volume shrinking process is investigated for various fabrication conditions of the porous PMMA materials, and microscopic morphology of the materials is observed by SEM.