Synthesis and terahertz-wave generation of mixed crystals composed of 1-methyl-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridinium p-toluenesulfonate and p-chlorobenzenesulfonate

Preparation, properties and structures of 1-methyl-4-{2-[4-(dimethylamino)phenyl]ethenyl}pyridinium crystals with various counter anions

“…For terahertz-wave generation using single crystals of DAST derivatives by DFG, generated terahertz-waves in some ranges are attenuated because of self-absorption due to the intra-or inter-molecular vibrations. In order to reduce this effect, we proposed utilization of mixed crystals obtained by two isomorphous compounds [30] because specific absorption peaks for single component are reduced although total peak numbers increase. Since some sets of isomorphous crystals were found, terahertz-wave generation property of the crystals may be improved into more leveled one by selecting proper multi-component mixture.…”

Crystal structure, spectroscopic studies and non‐linear optical properties of 2‐amino‐3‐nitropyridinium trichloroacetate

“…Organic nonlinear optical (NLO) materials are continuing to receive great interests due to their wide applications in laser technology , optical data storage and terahertz (THz) wave generation , etc . In the past decades, extensive efforts have been made to construct noncentrosymmetric (NCS) arrangement of molecules, which is indispensable for second‐order nonlinear optical crystals .…”

Pump-beam-induced optical damage depended on repetition frequency and pulse width in 4-dimethylamino-N ′-methyl-4′-stilbazolium tosylate crystal

“…In both the cases of 15-ns pulse duration and 600-ps duration, we demonstrated that the thermal effects in DAST crystals dominated the optical damage, which depended on thermal accumulation and dissipation. Organic nonlinear optical (NLO) crystal 4-dimethylamino-N 0 -methyl-4 0 -stilbazolium tosylate (DAST), 1,2 with its large nonlinearity, is a promising material for efficiently generating terahertz (THz) waves by second-order NLO processes such as difference frequency generation (DFG) 3-8 and optical rectification (OR), [9][10][11][12][13] as well as for detecting THz waves with high sensitivity by nonlinear up-conversion. 14 In particular, tunable THz-wave generation and monochromatic coherent detection have been developed for many THz-wave applications.…”