Abstract
We describe a THz spectrometer operating between 1.2 and 10.5 THz, consisting of band pass filters made by metasurfaces. The source is made of a 10 W small black body. The detector is a high sensitivity room temperature pyroelectric sensor. Various techniques that are used to prepare samples are described. The spectra obtained are compared with those measured with a Fourier Transformer Infrared Spectrometer on the same samples. Our instrument, which uses commercial technologies available at the present time, can constitute an economical alternative to very expensive spectrometers. It has already been successfully used, obtaining precise spectroscopic measurements on many inorganic powders.
Highlights
Spectroscopy is a common technique that is used to distinguish materials
Perception of colors by mean of human eyes is a natural form of spectroscopy
The instrument here described applies a similar technique in the Terahertz (THz) region of the electromagnetic spectrum, using band pass filters centered between 1.3 and 10.5 THz
Summary
Francesco Martini 1 , Ennio Giovine 1 , Fabio Chiarello 1 and Pasquale Carelli 1,2, *. Featured Application: A simple and cheap spectrometer in THz range of frequency
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