Crystal structure and second harmonic generation in cesium hydrogen malate hydrate

Etelvina de Matos Gomes; Cristina F. Goncalves; Michael S. Belsley; Flavio Ferreira; M. Margarida R. Costa; Victor H. Rodrigues; Alberto Criado

doi:10.1117/12.614096

20 September 2005 Crystal structure and second harmonic generation in cesium hydrogen malate hydrate

Etelvina de Matos Gomes, Cristina F. Goncalves, Michael S. Belsley, Flavio Ferreira, M. Margarida R. Costa, Victor H. Rodrigues, Alberto Criado

Author Affiliations +

Proceedings Volume 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II; 59120D (2005) https://doi.org/10.1117/12.614096
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

Cesium hydrogen L-malate monohydrate, CsH(C₄H₄O₅).H₂O, is a new non-linear optical semi-organic crystalline material with a second harmonic generation efficiency roughly 2.5 times greater than KDP. Its crystal structure, space group P2₁, shows that the malate anions, are interconnected through directional O-H•••O hydrogen bonding, in a head-to-tail arrangement, creating extended anionic layers. The water molecules provide a cross-link, through hydrogen bonding, between adjacent layers. Especially noteworthy is that the Cesium cations and the COO- group from the malate anions, form a sequence of nearly perfectly aligned dipoles oriented along the b crystallographic axis giving a permanent dipole moment of 38 Debye per unit cell. As the crystals are non hygroscopic and easy to grow, they are potential new material for nonlinear optical and pyroelectric applications.

Citation Download Citation

Etelvina de Matos Gomes, Cristina F. Goncalves, Michael S. Belsley, Flavio Ferreira, M. Margarida R. Costa, Victor H. Rodrigues, and Alberto Criado "Crystal structure and second harmonic generation in cesium hydrogen malate hydrate", Proc. SPIE 5912, Operational Characteristics and Crystal Growth of Nonlinear Optical Materials II, 59120D (20 September 2005); https://doi.org/10.1117/12.614096

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