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Terahertz spectroscopy
Terahertz spectroscopy is a new spectroscopic technique capable of obtaining information on intermolecular vibrations and crystals. Because different information is obtained compared to that from wavelengths used in UV-visible and infrared spectroscopy, terahertz spectroscopy is a promising approach to eliminating the problems encountered in conventional spectroscopic analysis.
Main Applications
Quality inspection/acceptance inspection
- Discriminative evaluation of material deterioration/assessment of good and defective products
- Simplified screening on receipt of raw materials
Manufacturing process control
- Evaluation of the fermentation process
- Real-time monitoring of crystal transition
- Determination and real-time monitoring of whether or not the target product has been produced in chemical synthesis
Quality evaluation of materials
Research
- Quantitative evaluation of solutes in aqueous solution (evaluation by obtaining calibration curves from refractive index, absorption coefficient, etc.)
- Measurement of crystallinity and crystalline form (using the sensitivity of terahertz waves to crystals)
- Evaluation and measurement of highly concentrated solutions (no dilution required)
- Non-destructive measurement of water content (using calibration curves)
- Measurement and evaluation of other phenomena caused by intermolecular interactions
Evaluation and measurement of liquid
Measurement technology realized by terahertz wave
Monitor of crystallinity
Terahertz wave is sensitive to crystallinity, so it is possible to evaluate crystallinity from measurement results that differ from those of conventional measurement methods.
*Evaluation of crystallinity: Determination of whether the material is crystalline or amorphous, hydrate or anhydrate, in crystal transition, or co-crystallized.
Nondestructive measurement
Terahertz waves are characterized by their low energy and minimally invasive nature, allowing measurements to be made without affecting the sample during or after analysis.
Real-time monitoring
To make the most of the non-destructive measurement feature, the system can monitor changes in absorption and refractive index in the terahertz wave band (e.g., water content, chemical synthesis, etc.) in real-time, including crystal evaluation.
Complex refractive index and complex permittivity evaluation
The complex refractive index and complex permittivity can be measured, enabling material analysis in the terahertz wave band.
Quantitative Measurement
Using calibration curves, quantitative measurement of solute and water content in liquids is possible without using chemicals or heating.
*Calibration curves must be obtained in advance.
Recommended products
Terahertz spectrometer is an attenuated total reflection (ATR) spectrometer integrating a terahertz wave emitter, detector and total reflection prism into a single unit.
These are Fresnel rhomb wave plates for controlling terahertz wave polarization.
- Confirmation
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