Generation of a violet phase-matched second-harmonic wave with a new organic single crystal, 8-(4′-acetylphenyl)-1,4-dioxa-8-azaspiro[4.5] decane

A new organic nonlinear optical material, 8-(4′-acetylphenyl)-1, 4-dioxa-8-azaspiro[4.5]decane (APDA) was synthesized. Under collinear type I phase-matching conditions, second-harmonic beams in a 380–450 nm wavelength region were obtained from a Ti-sapphire laser pumping with the single crystal. Nonlinear optical properties and sample preparation of the single crystal are reported.