Journal
OPTICS LETTERS
Volume 41, Issue 8, Pages 1777-1780Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.41.001777
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Funding
- Swiss National Science Foundation (SNSF) [200021_146769]
- Seventh Framework Programme (FP7) [290605]
- Department of Science and Technology of the Government of India [SR/S2/CMP-0028/2011]
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We report on high-energy terahertz pulses by optical rectification (OR) in the organic crystal N-benzyl-2-methyl-4-nitroaniline (BNA) directly pumped by a conventional Ti:sapphire amplifier. The simple scheme provides an optical-to-terahertz conversion efficiency of 0.25% when pumped by collimated laser pulses with a duration of 50 fs and a central wavelength of 800 nm. The generated radiation spans frequencies between 0.2 and 3 THz. We measured the damage threshold, as well as the dependency of the conversion efficiency on the pump fluence, pump wavelength, and pulse duration. (C) 2016 Optical Society of America
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