Efficient terahertz generation in highly nonlinear organic crystal HMB-TMS

• Main Authors: Lee, Seung-Chul (Author), Han, Jae-Hyun (Author), Kown, O-Pil (Author), Nelson, Keith A. (Author), Lu, Jian (Contributor), Lee, SeungHeon (Contributor), Li, Xian (Contributor)
• Other Authors: Massachusetts Institute of Technology. Department of Chemistry (Contributor)
• Format: Article
• Language: English
• Published: Optical Society of America, 2019-03-25T14:37:14Z.
• Subjects: Article
• Online Access: Get fulltext

We report on generation of strong and broadband terahertz (THz) pulses via collinearly phase-matched optical rectification of near-infrared femtosecond pulses in the organic nonlinear optical HMB-TMS (2-(4-hydroxy-3-methoxystyryl)-3-methylbenzo[d]thiazol-3-ium 2,4,6-trimethylbenzenesulfonate) single crystals which exhibit optimal molecular orientation and large macroscopic optical nonlinearity for efficient THz wave generation. Single-cycle THz pulses with a peak electric field strength of 0.66 MV/cm and a bandwidth from 0.1 to 5.4 THz are achieved from an HMB-TMS crystal with only a 2-mm clear aperture pumped by 1350 nm pulses at moderate fluences. The generated THz energy is about 1 µJ and the corresponding pump-to-THz energy conversion efficiency reaches 0.23%.
United States. Office of Naval Research (N00014-13-1-0509)
United States. Office of Naval Research. Defense University Research Instrumentation Program (N00014-15-1-2879)
Samsung Global Research Outreach Program
National Research Foundation of Korea (No. 2016R1A2B4011050
National Research Foundation of Korea (No. 2014R1A5A1009799)
National Research Foundation of Korea (No. 2015K1A3A1A14004646)
National Research Foundation of Korea (No. 2009-0093826)