The novel THz-Raman® Spectroscopy Modules supplied by Coherent allow Raman spectroscopy measurements to be carried out in the Terahertz (THz) region of the electromagnetic spectrum; allowing the same transitions observed in THz spectroscopy to be observed without impacting measurement of the fingerprint region.
The Terahertz region contains a unique “structural fingerprint” which can be used alongside the conventional IR region’s “chemical fingerprint” to determine both the molecular structure and the chemical composition of a sample in one measurement.
The TR-BENCH is designed to sit on the lab benchtop and is available with a range of different sample interface accessories making the measurement of different samples fast and simple. These accessories include a steerable non-contact optic and a practical holder for tablets and vials.
The TR-BENCH is provided with a standard cage mounting plate (with centering on the collimated output beam) which can work with custom collection optics or can be effortlessly integrated into custom systems. The system can be provided with dual-port/dual polarization outputs for S and P polarization measurements or with a circular polarization output.
TR-Series Products and Accessories
- Rapid collection of THz-Raman® spectra in the range of 150 GHz to 90 THz (5 cm-1 to >3000 cm-1)
- Compact, benchtop-ready casing with internal single frequency, high-power laser
- Output via fiber couple allows system to be integrated with other spectrometers
- Can be integrated with an existing Raman spectrometer/system or into a complete turnkey solution
- Changeable sample interface – contact probe tip, holder for vials/tablets, or steerable open beam
- Signal-to-noise ratio enhanced by the simultaneous collection of Stokes and anti-Stokes signals with calibration referencing
- Can be provided with excitation wavelengths of 532 nm, 785 nm, 850 nm, 976 nm and 1064 nm
- Monitoring of reactions and crystallization studies
- Identification and analysis of polymorphs
- Source attribution and trace detection of controlled substances, e.g. narcotics, explosives and hazmats
- Structural research into photovoltaics, semiconductors, and bio- and nanomaterials
- Mineralogy, archeology and forensics
Full Raman spectrum of the pharmaceutical Carbamazepine showing both the THz-Raman “Structural Fingerprint” and traditional “Chemical Fingerprint” regions. Note higher intensity and symmetry of THz-Raman signals