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Ultrabroadband terahertz generation using 4-N,N-dimethylamino-4[prime]-N[prime]-methyl-stilbazolium tosylate single crystals

Source: Appl. Phys. Lett. 97, 021105 (2010); doi:10.1063/1.3463452

Published 14 July 2010

KEYWORDS and PACS
Keywords
PACS
  • 42.65.Ky
    Optical frequency conversion; harmonic generation
  • 42.65.Re
    Ultrafast processes; optical pulse generation and pulse compression
  • 84.40.-x
    Radiowave and microwave technology
  • 42.70.Jk
    Optical polymers and other organic optical materials
  • YEAR: 2010
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PUBLICATION DATA
ISSN:
1553-9601 (online)
Publisher:
AIP is a member of CrossRef AIP
I. Katayama,1 R. Akai,2 M. Bito,2 H. Shimosato,2 K. Miyamoto,3 H. Ito,4 and M. Ashida2,5
1Interdisciplinary Research Center, Yokohama National University, Yokohama 240-8501, Japan
2Graduate School of Engineering Science, Osaka University, Toyonaka 560-8531, Japan
3Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
4RIKEN, Sendai 980-0845, Japan
5PRESTO, JST, Tokyo 102-0075, Japan
Ultrabroadband terahertz generation up to 200 THz has been demonstrated using a 5 fs Ti:sapphire laser and a 4-N,N-dimethylamino-4[prime]-N[prime]-methyl-stilbazolium tosylate (DAST) crystal. The high-frequency components beyond 100 THz are much stronger than those generated using conventional electro-optic crystals such as GaSe. A simple simulation of the difference frequency generation in the DAST crystal by considering the refractive index dispersion can reproduce the broadband generation of the terahertz wave and its chirp dependence. Because the generated terahertz wave is coherent and has a broad bandwidth, it can serve as a suitable light source for ultrabroadband terahertz time-domain spectroscopy of a material. ©2010 American Institute of Physics
History: Received 22 February 2010; accepted 21 June 2010; published 14 July 2010
Permalink: http://link.aip.org/link/?APPLAB/97/021105/1

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