Terahertz radiation from magnetoresistive Pr${}_{\text{0.7}}$Ca${}_{\text{0.3}}$MnO${}_{\text{3}}$ thin films

Abstract

Terahertz (THz) radiation with its spectrum extending up to 1 THz has been observed by an illumination of femtosecond optical pulses to optical switching devices fabricated on magnetoresistive manganite thin films; Pr${}_{0.7}$Ca${}_{0.3}$MnO${}_3$. The THz radiation strongly depends on temperature $T$ and its $T$ trend reverses sign across charge-orbital and spin ordering $T$'s.

Revtex4, 4 pages including 3 figures

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