Linear polymers for nonlinear optics. 2. Synthesis and electrooptical properties of polymers bearing pendant chromophores with methylsulfonyl electron-acceptor groups

Abstract

Several acrylic polymers bearing pendant stilbene or azobenzene chromophores containing 4'-dhkylamino eledron donors and 4-methylsulfonyl electron acceptors have been synthesized. These amorphous polymers exhibited good film-forming abilities, moderately high glass transition temperatures, and excellent optical clarity. Film samples of the polymers were poled in electric fields and demonstrated large, stable second-order nonlinear optical properties. Electrooptic coefficients at 632 nm were measured using ellipsometry. To demonstrate their utility in electrooptical devices, the title polymers were fabricated into low-low waveguides, and Mach-Zehnder interferometers were constructed. Electrooptic coefficients as high as 12 pm/V were measured at 860 nm with these prototypical devices. Comparisons between experimental and predicted electrooptic coefficients are presented.

Electric Field Poling in Polymeric Nonlinear Optical Materials. Relaxation Dynamics, Model, and Experiment

“…The Kohlrausch-Williams-Watts (KWW) equation is an empirical function which has been applied to evaluate the SHG decay in a variety of NLO polymer systems.24'50 '51 The KWW function (eq 41) <Ht) = e~(thf (41) describes relaxation behavior as a distribution of relax-…”

A Multifunctional Photorefractive Material Showing High Optical Gain and Diffraction Efficiency

“…4-(Diethoxyphosphorylmethyl)benzoic acid methyl ester [18] and NLO chromophore compound 3 [19] were prepared according to literature procedures. All of the other chemicals were purchased from Aldrich and used as received unless otherwise stated.…”

Synthesis and Characterization of Novel Side-Chain Nonlinear Optical Polymers Based on Poly(1,6-heptadiyne) Derivatives

“…The yellow solid thus formed was collected by filtration, washed with water, and air dried. Recrystallization from ethanol/pyridine yielded 5.6 g of a yellow solid: -NMR (DMSO-de) <5 1.67 (m, 2H), 2.93 (s, 6H), 3.23 (t, 2H), 3.39 (m, 3H), 6.74 (d, 2H), 7.1 (d, 1H), 7.39 (d, 1H), 7.49 distilled pyridine (0.79 g, 10.1 mmol), and 50 mL of dry, distilled THF was treated dropwise with dipropargyl acetic acid chloride14 (1.9 g, 12 mmol) in 20 mL of THF at 25 °C under nitrogen. The resulting solution was stirred at 50 °C for 48 h and then poured onto 300 mL of aqueous sodium bicarbonate.…”

“…Caled for C27H29NO4S: C, 69.95; , 6.30. Found: C, 69.82; H, 6.23. -NMR (CDC13): 1.36-1.71 (m, 8H), 1.97 (t, 2H), 2.60 (m, 4H), 2.73 (m, 1H), 2.99 (s, 6H), 3.09 (t, 2H), 4.12 (t, 2H), 6.72 (d, 2H), 6.93 (d, J = 16.24, 1H), 7.21 (d, J = 16.26, 1H), 7.44 (d, 2H), 7.60 (d, 2H), 7.82 (d, 2H). 13C-NMR (CDCI3): 19.9 (-CH2O, 22.6, 25.4, 27.8, 28.2 (methylene), 40.3 (-CH-), 43.0 (NCH3), 56.3 (CH2S02), 64.7 (CH20), 70.5 (=CH), 80.5 (=C-), 112.2, 121.8, 124.4, 126.3, 128.2, 128.4, 132.9, 135.7, 143.8, 150.6 (stilbene), 172.1 (C02).…”