H. Anwar,"kosuge et al., 4-(dimethylamino)-1-ethylpyridinium iodide: A new colorless organic ionic crystal for second-order nonlinear optics, JPN J A P 1, 40(6A), 2001, pp. 4213-4216
A new organic ionic crystal of 4-(dimethylamino)-1-ethylpyridinium iodide (
DMAEPI) was synthesized for use in second-order nonlinear optics, and its c
rystal structure was found to belong to the orthorhombic space group Pmn2(1
). This crystal is considered to be a promising candidate for frequency con
version of diode lasers, since it has an estimated off-diagonal component o
f second-harmonic coefficient (d) which is about three-fourths that of the
yellowish (4-nitrophenyl)-L-prolinol (NPP) irrespective of the cutoff wavel
ength at approximately 390 nm.