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- Title
SEM, Chemical Etching and THz Wave Generation of 4-Dimethylamino-N-methyl-4-stilbazolium Tosylate (DAST) Single Crystals.
- Authors
Qing Sun; Bing Teng; Lifeng Cao; Shaohua Ji; Degao Zhong; Lun Hao; Han Xu; Yingtao Zhao
- Abstract
The 4-dimethylamino-N-methyl-4-stilbazolium tosylate (DAST) crystal which was candidate for generating and detecting terahertz (THz) wave was grown by slope nucleation method (SNM). The functional groups of DAST were identified by Fourier Transform Infrared (FTIR) studies. Macroscopic steps and streaks on the (00) face were found by scanning electron microscope (SEM). Different patterns of etch pits under different chemical etchants were studied by optical microscope. Widely tunable THz waves ranging from 0.38 to 18.10 THz were generated from 0.5 mm-thick DAST crystal. The maximum output energy was 345.4 nJ/pulse at 3.39 THz and the conversion efficiency was 8.44 × 10-5.
- Subjects
SINGLE crystals; FUNCTIONAL groups; TERAHERTZ materials; SCANNING electron microscopes; FOURIER transform infrared spectroscopy
- Publication
Crystallography Reports, 2017, Vol 62, Issue 7, p1182
- ISSN
1063-7745
- Publication type
Article
- DOI
10.1134/S1063774517070215