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Applied Physics Letters / Volume 98 / Issue 9 / LASERS, OPTICS, AND OPTOELECTRONICS

Appl. Phys. Lett. 98, 091106 (2011); http://dx.doi.org/10.1063/1.3560062 (3 pages)

Single-cycle terahertz pulses with amplitudes exceeding 1 MV/cm generated by optical rectification in LiNbO3

H. Hirori1,2, A. Doi2,3, F. Blanchard1,2, and K. Tanaka1,2,4

1Institute for Integrated Cell-Material Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
2CREST, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
3Olympus Corporation, Hachioji-shi, Tokyo 192-8512, Japan
4Department of Physics, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan

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(Received 26 January 2011; accepted 8 February 2011; published online 2 March 2011)

Using the tilted-pump-pulse-front scheme, we generate single-cycle terahertz (THz) pulses by optical rectification of femtosecond laser pulses in LiNbO3. In our THz generation setup, the condition that the image of the grating coincides with the tilted-optical-pulse front is fulfilled to obtain optimal THz beam characteristics and pump-to-THz conversion efficiency. By using an uncooled microbolometer-array THz camera, it is found that the THz beam leaving the output face of the LN crystal can be regarded as a collimated rather than point source. The designed focusing geometry enables tight focus of the collimated THz beam with a spot size close to the diffraction limit, and the maximum THz electric field of 1.2 MV/cm is obtained.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

lithium compounds, optical pulse generation, terahertz waves

PACS

  • 42.60.-v

    Laser optical systems: design and operation

  • 42.65.Re

    Ultrafast processes; optical pulse generation and pulse compression

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3560062

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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