Recent progress in acentric core structures for highly efficient nonlinear optical crystals and their supramolecular interactions and terahertz applications. Issue 38 (15th August 2016)

• Record Type: Journal Article
• Authors: Lee, Seung-Heon; Jazbinsek, Mojca; Hauri, Christoph P.; Kwon, O-Pil
• Is Part Of: CrystEngComm. Volume 18:Issue 38(2016)
• Page Start: 7180
• Page End: 7203
• Publication Date: 2016-08-15
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce00707d
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : In this highlight, we review the present status of acentric core structures for highly efficient nonlinear optical organic crystals and discuss their distinctive supramolecular interactions and THz wave generation and detection applications. Abstract : During the past decade, various new types of organic nonlinear optical crystals have been developed to overcome the benchmark stilbazolium DAST (4-(4-( N, N -dimethylamino)styryl)-1-methylpyridinium 4-methylbenzenesulfonate) crystal. Here, we review the acentric core structures used in recently developed organic nonlinear optical crystals exhibiting high macroscopic second-order optical nonlinearity, along with their supramolecular interactions and THz applications. The nonlinear optical acentric core structures such as neutral CLP (configurationally locked polyene based on phenyltriene), ionic pyridinium-based N -alkyl DAS (4-(4-( N, N -dimethylamino)styryl)-1-alkylpyridinium benzenesulfonate) and N -phenyl DAP ((4-( N, N -dimethylamino)styryl)-1-phenylpyridinium hexafluorophosphate), ionic quinolinium-based HMQ (2-(4-hydroxy-3-methoxystyryl)-1-methylquinolinium benzenesulfonate) and OHQ (2-(4-hydroxystyryl)-1-methylquinolinium benzenesulfonate) and benzoindolium-based DBI (2-(4-(dimethylamino)styryl)-1, 3, 3-trimethyl-3 H -benzo[ g ]indolium iodide) exhibit comparable or enhanced physical properties compared to DAST crystals. Organic crystals introducing an identical acentric core structure often exhibit similar molecular alignment features with analogous supramolecular interactions. We also discuss the nonlinear optical properties and potential applications of these materials, in particular their very promising THz photonic applications.