Detection of terahertz radiation from longitudinal optical phonon-plasmon coupling modes in InSb film using an ultrabroadband photoconductive antenna

Ping Gu, Masahiko Tani, Kiyomi Sakai, T. R. Yang

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Terahertz radiation from longitudinal optical (LO) phonon-plasmon coupling modes in InSb films is observed using an ultrafast photoconductive antenna detector. We demonstrate a response frequency of up to 7 THz for a low-temperature-grown GaAs-based photoconductive antenna gated with 25 fs laser pulses. It is found that the emission frequencies of the coupling modes are dependent only on the residual carrier density, not on the excitation carrier density. It is also found that the LO phonon-plasmon oscillations in semiconductors can serve as an efficient THz source.

Original languageEnglish
Pages (from-to)1798-1800
Number of pages3
JournalApplied Physics Letters
Volume77
Issue number12
DOIs
Publication statusPublished - 2000 Sep 18

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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