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With
the progress of millimeter wave (mmw) and terahertz wave (THz wave)
technology (100GHz~10THz) and growing prospects on their
telecommunication and sensing applications, the demand of accurate and
traceable measurement of mmw and THz waves has been increasing in
industries. Activities in the THz methodology project covers both "how
to measure the power of mmw and THz waves", and "material analysis by
using mmw and THz waves".
Through this fundamental research, we contribute to realise high speed
wireless network and innovative and reliable non-destructive sensing
technologies.
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The
demand of accurate and traceable measurement of millimeter waves mw and
THz waves has been increasing in industries. Standard and traceable
measurement methods are required to SHARE the frequency between
telecommunications, passive and active sensing.
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From Arbitrary Unit to Absolute THz power
・Power standard
・THz spectrum analyzer
・Calibration of power meter and antennas
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Accurate and reliable analysis of substances
・System validation
・Spectra database
・Measurement protocols
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Theme
・Precision Measurement of millimeter and THz waves
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THz measurement Lab:
Power
（Evaluation of sources）
Applications
（Spectroscopy, imaging）
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Power
standard and accurate measurement methods is being established.
Calibration service will be available up to 300 GHz by 2015.
Propagation characteristics for telecommunication applications is
investigated, and the results will contribute to ITU-R frequency
management activities.
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・Improvement of accuracy in THz spectroscopy and imaging
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System
validation method and measurement protocols are being
established. Spectra database which is currently run by NICT and
RIKEN "http://thzdb.org" will be enlarged
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Industrial applications of millimeter and THz waves |
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Biological
materials evaluations, non-destructive test of buildings and houses
after earthquake, ageing monitoring of high voltage apparatus, and more
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Study on Absorption Properties of Biominerals by THz Band
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We
have measured absorption properties of biominerals in a THz band. In
oriented cuttlefish bone samples, an absorption peak appeared at
approximately 2 THz. The peak magnitude and frequency depended on the
direction of the incident terahertz electric field and the interaction
between inorganic crystal and organic matter. By using the absorption
properties, we can distinguish the tissue condition in cuttlefish bone.
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Complicated
structures of biominerals have been studied owing to their potential
application as scaffold materials in regeneration engineering. The data
of the crystal structure and the interaction between the organic and
inorganic matter present within biominerals are important in material
development for various application.
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