T. Tomono et al., CHARACTERIZATION OF A NOVEL NONLINEAR-OPTICAL CRYSTAL (DAD) CONTAINING CYCLOBUTENEDIONE AS AN ELECTRON-ACCEPTOR, Journal of physics. D, Applied physics, 26(8B), 1993, pp. 217-220
A novel organic crystal, 1-(4-dimethylaminophenyl)-2-(2-hydroxypropyla
mino) cyclobutene-3,4-dione (DAD), has been grown and its linear and n
onlinear optical properties have been characterized. The DAD Crystal b
elongs to a space group P1 with a large second-order nonlinear optical
coefficient d11, which is measured by the Maker-fringe method to be 2
00 +/- 40 pm V-1 at a fundamental wavelength of 1.064 mum.