Abstract
Polarized optical micrography (POM) images of gratings and UV-visible spectra of holographic polymer dispersed liquid crystals (HPDLC) are reported for a ternary monomer system composed of dipentaerythritol hydroxypentaacrylate/trimethylolpropanetriacrylate/N-vinylpyrrolidone (DPHPA/TMPTA/NVP) = 7/2/1 by weight. Gratings were written by irradiation with an argon ion laser (λ = 488nm) at various intensities (20-200mWcm -2 ) on monomer/liquid crystal (LC) composite films of various compositions (75125, 70/30, 65135, 62138, 60/40). Reflection efficiency-irradiation intensity-film composition relationships are obtained in three dimensional plots which show that maximum reflection moves from high LC content (38%) at low irradiation intensity (20mWcm -2 ) to low LC content (25wt%) at high irradiation intensity (200mWcm -2 ).
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
