Journal
OPTICS EXPRESS
Volume 26, Issue 23, Pages 30786-30794Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.030786
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Funding
- Office of Naval Research (ONR) [N00014-13-1-0509]
- Defense University Research Instrumentation Program (DURIP) [N00014-15-1-2879]
- Samsung Global Research Outreach (GRO) program
- National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning and Ministry of Education, Korea [2016R1A2B4011050, 2014R1A5A1009799, 2015K1A3A1A14004646, 2009-0093826]
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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 mu J and the corresponding pump-to-THz energy conversion efficiency reaches 0.23%. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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