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Proceedings Article

Detection of coherent tunable THz-wave using of stimulated polariton scattering in MgO:LiNbO3

[+] Author Affiliations
Ruixiang Guo, Tomofumi Ikari, Hiroaki Minamide

RIKEN Sendai (Japan)

Hiromasa Ito

RIKEN Sendai (Japan) and RIEC Tohoku Univ. (Japan)

Proc. SPIE 6582, Nonlinear Optics and Applications II, 65820Z (May 08, 2007); doi:10.1117/12.722990
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From Conference Volume 6582

  • Nonlinear Optics and Applications II
  • Mario Bertolotti
  • Prague, Czech Republic | April 16, 2007

abstract

We report the experimental results of generation and coherent detection of narrow linewidth tunable terahertz radiation at room temperature utilizing a difference frequency generation as a result of stimulated scattering in the nonlinear crystal of MgO:LiNbO3. The terahertz radiation was generated from an all-solid-state tunable injection-seeded THz-wave parametric generator (is-TPG), which emits the monochromatic THz-wave over a wide tunable frequency range from 0.6 THz to 2.4 THz with the linewidth of narrower than 100 MHz. Mixing of terahertz radiation (frequency ωT ) with a near-infrared intense pump pulse (frequency ωP ) results in the excitation and amplification of the difference frequency component with frequency ωiPT, which is detected with a InGaAsbased photodiode. We demonstrate this method a fast response and very sensitive THz-wave detection running at room temperature, which is at least three of magnitude faster and two of magnitude more sensitive than a typical Liquid-He cooling Si bolometer for detecting the quasi-cw THz-wave beam. This detection technique is possible for coherent detection, it can measure the THz electric field, not only the intensity. As a result, the phase information is preserved, the real and imaginary parts of a sample's dielectric function may be determined simultaneously with this detection.

© (2007) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Ruixiang Guo ; Tomofumi Ikari ; Hiroaki Minamide and Hiromasa Ito
"Detection of coherent tunable THz-wave using of stimulated polariton scattering in MgO:LiNbO3", Proc. SPIE 6582, Nonlinear Optics and Applications II, 65820Z (May 08, 2007); doi:10.1117/12.722990; http://dx.doi.org/10.1117/12.722990


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