Takao Tomono

Phase-matched second harmonic generations in poled polymer films based on poly (methyl methacrylate) containing a p-aminophenyl-cyclobutenedione moiety as the side chains

Abstract Poled polymer films containing a nonlinear optical active moiety (cyclobutenedione derivative) as the side chains were prepared and applied to frequency doublings in guided-wave structures. A (p-aminophenyl) cyclobutenedione containing monomer, 1-{4-[N-(2- methacryloyloxyethyl)-N-methyl-aminol-phenyl}-2-methylamino-cyclobutene -3,4-dione [CD1-MA was newly synthesized. For less than 20 wt% concentration, amorphous copolymers of CD1-MA with methyl methacrylate showed the glass transition at around 125°C. The copolymers were crystalline at higher dye concentrations. The d33 value of the poled polymer film with 10 wt% of CD1-MA concentration was estimated as 8.1 pm.V−1 by the Maker fringe method. Second harmonic waves of Nd:YAG laser (1064 nm) were observed in three-layer optical waveguides (air / poled polymer / pyrex glass) for the collinear type and the Cerenkov type phase matchings.

20.3: An Advanced Projection Screen with a Wide Vertical View Angle

An advanced projection screen with a wide vertical view angle was proposed for application on LCD/DLP rear projection TV. An advanced projection screen consists of one screen and made it possible to widen vertical view angle. It follows that the screen will be expected as next generation projection screen.