High-resolution GaP terahertz spectrometer and its application to detect defects in gamma-irradiated glucose crystal

Jun Ichi Nishizawa; Tetsuo Sasaki; Ken Suto; Masahiko Ito; Takashi Yoshida; Tadao Tanabe

doi:10.1007/s10762-007-9322-9

High-resolution GaP terahertz spectrometer and its application to detect defects in gamma-irradiated glucose crystal

Jun Ichi Nishizawa, Tetsuo Sasaki, Ken Suto, Masahiko Ito, Takashi Yoshida, Tadao Tanabe

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

We developed high-resolution GaP THz signal generator using Cr:Forsterite lasers with gratings as both a pump and a signal beam for difference-frequency generation. A line width of less than 500 MHz and a wide tunable frequency range (0.6-6.2 THz) provide sufficient resolution for measuring materials with sharp absorption bands using the generator as the light source for a THz spectrometer. This is suitable for materials such as gases or solid samples at low temperatures. We demonstrated the detection of defects in organic materials, as they appear as slight deviations in the absorption frequency in the THz region.

Original language	English
Pages (from-to)	291-297
Number of pages	7
Journal	International Journal of Infrared and Millimeter Waves
Volume	29
Issue number	3
DOIs	https://doi.org/10.1007/s10762-007-9322-9
Publication status	Published - 2008 Mar
Externally published	Yes

Keywords

Cr:forsterite laser
Defect
GaP
Spectroscopy
Terahertz wave

ASJC Scopus subject areas

Radiation
Atomic and Molecular Physics, and Optics
Instrumentation
Condensed Matter Physics
Physics and Astronomy (miscellaneous)
Electrical and Electronic Engineering

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10.1007/s10762-007-9322-9

Cite this

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title = "High-resolution GaP terahertz spectrometer and its application to detect defects in gamma-irradiated glucose crystal",

abstract = "We developed high-resolution GaP THz signal generator using Cr:Forsterite lasers with gratings as both a pump and a signal beam for difference-frequency generation. A line width of less than 500 MHz and a wide tunable frequency range (0.6-6.2 THz) provide sufficient resolution for measuring materials with sharp absorption bands using the generator as the light source for a THz spectrometer. This is suitable for materials such as gases or solid samples at low temperatures. We demonstrated the detection of defects in organic materials, as they appear as slight deviations in the absorption frequency in the THz region.",

keywords = "Cr:forsterite laser, Defect, GaP, Spectroscopy, Terahertz wave",

author = "Nishizawa, {Jun Ichi} and Tetsuo Sasaki and Ken Suto and Masahiko Ito and Takashi Yoshida and Tadao Tanabe",

note = "Funding Information: Acknowledgement This work is partly supported by Grant-in-Aid for Scientific Research (Creative Scientific Research, 17GS0209) by Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS). We would like to thank Dr. Hiroo Inokuchi for giving us the knowledge about defects detection in organic compounds. We are also grateful to Mr. Jiro Shibata (Terahertz laboratory, Co. Ltd.) for valuable discussion.",

year = "2008",

month = mar,

doi = "10.1007/s10762-007-9322-9",

language = "English",

volume = "29",

pages = "291--297",

journal = "Journal of Infrared, Millimeter, and Terahertz Waves",

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publisher = "Springer New York",

number = "3",

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TY - JOUR

T1 - High-resolution GaP terahertz spectrometer and its application to detect defects in gamma-irradiated glucose crystal

AU - Nishizawa, Jun Ichi

AU - Sasaki, Tetsuo

AU - Suto, Ken

AU - Ito, Masahiko

AU - Yoshida, Takashi

AU - Tanabe, Tadao

N1 - Funding Information: Acknowledgement This work is partly supported by Grant-in-Aid for Scientific Research (Creative Scientific Research, 17GS0209) by Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS). We would like to thank Dr. Hiroo Inokuchi for giving us the knowledge about defects detection in organic compounds. We are also grateful to Mr. Jiro Shibata (Terahertz laboratory, Co. Ltd.) for valuable discussion.

PY - 2008/3

Y1 - 2008/3

N2 - We developed high-resolution GaP THz signal generator using Cr:Forsterite lasers with gratings as both a pump and a signal beam for difference-frequency generation. A line width of less than 500 MHz and a wide tunable frequency range (0.6-6.2 THz) provide sufficient resolution for measuring materials with sharp absorption bands using the generator as the light source for a THz spectrometer. This is suitable for materials such as gases or solid samples at low temperatures. We demonstrated the detection of defects in organic materials, as they appear as slight deviations in the absorption frequency in the THz region.

AB - We developed high-resolution GaP THz signal generator using Cr:Forsterite lasers with gratings as both a pump and a signal beam for difference-frequency generation. A line width of less than 500 MHz and a wide tunable frequency range (0.6-6.2 THz) provide sufficient resolution for measuring materials with sharp absorption bands using the generator as the light source for a THz spectrometer. This is suitable for materials such as gases or solid samples at low temperatures. We demonstrated the detection of defects in organic materials, as they appear as slight deviations in the absorption frequency in the THz region.

KW - Cr:forsterite laser

KW - Defect

KW - GaP

KW - Spectroscopy

KW - Terahertz wave

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DO - 10.1007/s10762-007-9322-9

M3 - Article

AN - SCOPUS:39149094264

SN - 1866-6892

VL - 29

SP - 291

EP - 297

JO - Journal of Infrared, Millimeter, and Terahertz Waves

JF - Journal of Infrared, Millimeter, and Terahertz Waves

IS - 3

ER -

High-resolution GaP terahertz spectrometer and its application to detect defects in gamma-irradiated glucose crystal

Abstract

Keywords

ASJC Scopus subject areas

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