摘要： This paper presents the electro-optical characteristics of polarization-independent holographic gratings (HGs) recorded in polymer-dispersed liquid crystals (PDLCs) using off-resonant laser beam. The key mechanism is based on the low light absorbance by the materials used, which enables a slow polymerization-induced phase separation. The off-resonant light can penetrate through the cell without much energy loss (absorbance) and can be uniformly absorbed across the LC cell to produce uniform PDLC structures. The intensity-modulated interference field, which is generated by two linearly polarized off-resonant laser beams, is adopted to record the HGs. The fabricated HGs are electrically switchable and polarization independent. Moreover, the diffractions of the HGs fabricated using off-resonant light is better than those produced by resonant light. 出版日期： 2015-04-01 出處： Optical materials express, 2015-04, Vol.5 (4), p.774-780 資源來源： Optica Publishing Group (Optics Infobase) 識別號： ISSN: 2159-3930 識別號： EISSN: 2159-3930 識別號： DOI: 10.1364/OME.5.000774
