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Proceedings Paper

Possibility of high power THz radiation via electromagnetically induced transparency at ion acoustic frequency region in laser-produced dense plasmas
Author(s): Noboru Yugami; Takeshi Higashiguchi; Ryousuke Kodama
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Paper Abstract

Electromagnetically induced transparency (EIT) is a well-known quantum phenomena that electromagnetic wave controls the refractive index of medium. It enables us to create a passband for low frequency electromagnetic wave in a dense plasma even if the plasma is opaque for the electromagnetic wave. This technique can be used to prove the ion acoustic wave because the ion acoustic frequency is lower than the plasma frequency. We have investigated a feasibility of electromagnetic radiation at THz region corresponding to the ion acoustic frequency from a dense plasma. We confirmed that the passband is created at about 7.5 THz corresponding to the ion acoustic frequency in the plasma (1021 cm-3) with a Ti:Sapphire laser (800 nm, 1017 W/cm2). The estimated radiation power is around 1 MW, which is expected to be useful for nonlinear THz science and applications.

Paper Details

Date Published: 7 May 2009
PDF: 5 pages
Proc. SPIE 7359, Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond, 735911 (7 May 2009); doi: 10.1117/12.819890
Show Author Affiliations
Noboru Yugami, Utsunomiya Univ. (Japan)
Japan Science and Technology Agency, CREST (Japan)
Takeshi Higashiguchi, Utsunomiya Univ. (Japan)
Japan Science and Technology Agency, CREST (Japan)
Ryousuke Kodama, Osaka Univ. (Japan)
Japan Science and Technology Agency, CREST (Japan)


Published in SPIE Proceedings Vol. 7359:
Harnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond
Dino A. Jaroszynski; Antoine Rousse, Editor(s)

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