Quadratic Non-Linear Optical Properties of the poly(2,5-<i>bis</i>(but-2-ynyloxy) Benzoate Containing the 2-(ethyl(4-((4-nitrophenyl)buta-1,3-diynyl)phenyl)amino)ethanol) Chromophore

• Main Authors: Sandra L. Castañón-Alonso, Omar G. Morales-Saavedra, Marco A. Almaraz-Girón, Sandro Báez-Pimiento, Alejandro Islas-Jácome, L. M. Rocha-Ramírez, Armando Domínguez-Ortiz, Marcos Esparza-Schulz, Adolfo Romero-Galarza, María E. Hernández-Rojas
• Format: Article
• Language: English
• Published: MDPI AG 2020-01-01
• Series: Polymers
• Subjects: diacetylenes; push-pull polymers; non-linear optics; optical materials; organic films
• Online Access: https://www.mdpi.com/2073-4360/12/1/241
• ISSN: 2073-4360

Excellent quadratic non-linear optical (ONL-2) properties of the poly(2,5-<i>bis</i>(but-2-ynyloxy) benzoate, containing a polar diacetylene as a chromophore, were found. According with the Maker fringes method, oriented polymer films showing an order parameter of &#8764;0.23 can display outstanding and stable Second Harmonic Generation (SHG) effects under off-resonant conditions (SHG-532 nm). Also, the macroscopic non-linear optical (NLO)-coefficients were evaluated under the rod-like molecular approximation, obtaining: <i>&#967;_zzz</i>⁽²⁾ and <i>&#967;_zxx</i>⁽²⁾ in the order of 280 &#177; 10 and 100 &#177; 10 pm V^&#8722;1, respectively. The mechanical and chemical properties, in addition to the large ONL-2 coefficients exhibited by this polymer, make it a promising organic material in the development of optoelectronic/photonic devices.