THz Spectrometers

Compact THz Spectrometers offered by Microtech Instruments, Inc. enable transmission measurements in thespectral range of 100 GHz to 1.5 THz. These systems are based on millimeter wave Backward Wave Oscillators (BWO's) combined with frequency multipliers and broadband Pyroelectric Detectors.

Key Features Include:

Compact THz Spectrometer:

Download Compact THz Spectrometer Datasheet (PDF, 80 KB)

THz spectrometers offered by Microtech Instruments enable high-resolution spectroscopic measurements in the spectral range from 180 GHz to 1.42 THz. These systems employ frequency tunable Backward Wave Oscillators (BWOs) as sources of THz radiation and Golay Cells as detectors.

Key features include:

• Spectral range: 30 GHz - 1.42 THz
• Spectral resolution: 1- 10 MHz
• Dynamic Range: 10^5

The THz spectrometer is a user friendly, computer controlled system used in leading research institutions worldwide.

Download THz Spectrometer Datasheet (PDF, 194 KB)

THz transmission spectrometer:

Transmission measurement is the best method for characterization of highly transparent materials. In particular, transmission spectra of plane parallel plates exhibit a periodic transmission pattern caused by interference (Fabry-Perot etalon fringes). Real and imaginary parts of the dielectric constant can be determined from these measurements, as the period and amplitude of the etalon fringes depend on the material refractive index and absorption, respectively.

Characterization of semi-transparent materials requires a THz Mach-Zehnder interferometer (shown below), since no etalon fringes can be observed in the transmission spectra of such materials. The Mach-Zehnder setup enables measurements of a phase shift induced by the sample as a function of frequency. Combining this data with transmission spectrum, real and imaginary parts of the dielectric constant can be calculated.

THz Mach-Zehnder spectrometer:

Highly absorptive materials can only be characterized in a reflection geometry, illustrated below.

THz reflection spectrometer:

The transmission, Mach-Zehnder and reflection spectrometers are supported by TScan software, enabling automated data acquisition and analysis. One spectral scan takes 1 - 5 minutes for each of the BWOs employed in the system.

Application Examples:

THz spectrometer applications at National High Magnetic Field Laboratory in Florida

THz spectrometer applications at Stuttgart University (Choose language at the bottom of the screen, click on "Research" and then click on "Millimeter and Submillimeter Wave Spectroscopy" at the right of the screen)

Detailed specifications and pricing are available on request at sales@mtinstruments.com