Physical origin of magnetically induced periodic structure observed in terahertz radiation spectrum emitted from InAs

Hiroshi Takahashi, Alex Quema, Masahiro Goto, Shingo Ono, Nobuhiko Sarukura, Gen Nishijima, Kazuo Watanabe

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Terahertz (THz) radiation from femtosecond-laser-irradiated InAs (100) surface is investigated. It is found that THz-radiation spectrum exhibits two inter-related phenomena in a strong magnetic field under the Voigt configuration. The peak shift of THz-radiation spectrum toward lower frequency is observed with increasing magnetic field. Additionally, THz-radiation spectrum is found to posses a periodic structure owing to the interference of THz-radiation pulses from the front and back surfaces of the InAs substrate. The physical origin of the latter phenomenon is discussed by considering the magneto-plasma effect, which affects both real and imaginary parts of refractive index for THz-radiation propagating in a direction perpendicular to the magnetic field.

Original languageEnglish
Pages (from-to)L1017-L1019
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume43
Issue number8 A
DOIs
Publication statusPublished - 2004 Aug 1

Keywords

  • Hybrid magnet
  • InAs
  • Magneto-plasma effect
  • Semiconductor surface
  • Terahertz radiation
  • Tl:sapphire laser

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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