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Issue 103, 2016
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Growth, transmission, Raman spectrum and THz generation of DAST crystal

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Abstract

The organic crystal 4-N,N-dimethylamino-4-N-methyl stilbazolium tosylate (DAST) was obtained by seed crystal method. We measured a maximum optical transmittance of 81%. Difference frequency generation (DFG) with reflecting double-pass optical parametric oscillator (OPO) was applied to generate terahertz (THz) wave. Tunable THz waves in the broad range of 0.51–19.69 THz were achieved. The maximum pulse energy was 267.7 nJ at 4.11 THz, and the laser-to-THz conversion efficiency of 1.04 × 10−4 was obtained. Raman spectrum measurement also indicates the consistence of the Raman modes and the THz tuning curve from DAST crystal. The theoretical THz transmittance values are calculated and compared with the measured values. The variation tendency of the measured transmittance with THz frequency is found to be in agreement with that of the theoretical ones.

Graphical abstract: Growth, transmission, Raman spectrum and THz generation of DAST crystal

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Publication details

The article was received on 14 Jun 2016, accepted on 14 Oct 2016 and first published on 14 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA15393C
Citation: RSC Adv., 2016,6, 101389-101394
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    Growth, transmission, Raman spectrum and THz generation of DAST crystal

    L. Cao, B. Teng, D. Xu, H. Zhao, L. Hao, J. Yao and J. Guo, RSC Adv., 2016, 6, 101389
    DOI: 10.1039/C6RA15393C

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