Laser terahertz emission system to investigate hydrogen gas sensors

Toshihiko Kiwa, Keiji Tsukada, Masato Suzuki, Masayoshi Tonouchi, Sonoko Migitaka, Koichi Yokosawa

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A laser terahertz emission system is proposed to investigate the catalytic metal/semiconductor interfaces of hydrogen sensors. Samples were fabricated by depositing a catalytic metal thin film on a semi-insulating silicon substrate. A femtosecond laser was used to radiate terahertz waves from the sample in a gas cell filled with a hydrogen and nitrogen gas mixture. The peak amplitude of the terahertz waves decreased with increasing hydrogen concentration. We also fabricated a metal-oxide-semiconductor field effect transistor hydrogen sensor, and compared its properties with the terahertz radiation properties. These results suggest that the laser terahertz emission system is a potential tool to investigate catalytic metal/semiconductor interfaces.

Original languageEnglish
Article number261102
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number26
DOIs
Publication statusPublished - Jun 27 2005

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sensors
hydrogen
gases
lasers
metals
metal oxide semiconductors
gas mixtures
field effect transistors
nitrogen
silicon
radiation
thin films
cells

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Laser terahertz emission system to investigate hydrogen gas sensors. / Kiwa, Toshihiko; Tsukada, Keiji; Suzuki, Masato; Tonouchi, Masayoshi; Migitaka, Sonoko; Yokosawa, Koichi.

In: Applied Physics Letters, Vol. 86, No. 26, 261102, 27.06.2005, p. 1-3.

Research output: Contribution to journalArticle

Kiwa, T, Tsukada, K, Suzuki, M, Tonouchi, M, Migitaka, S & Yokosawa, K 2005, 'Laser terahertz emission system to investigate hydrogen gas sensors', Applied Physics Letters, vol. 86, no. 26, 261102, pp. 1-3. https://doi.org/10.1063/1.1954885
Kiwa, Toshihiko ; Tsukada, Keiji ; Suzuki, Masato ; Tonouchi, Masayoshi ; Migitaka, Sonoko ; Yokosawa, Koichi. / Laser terahertz emission system to investigate hydrogen gas sensors. In: Applied Physics Letters. 2005 ; Vol. 86, No. 26. pp. 1-3.
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