Product Introduction

Terahertz is a very popular research direction in recent years, and terahertz time-domain spectroscopy testing technology is an emerging and thriving technology. At present, most research laboratories in the fields of physics and optics at home and abroad have been equipped with terahertz time-domain spectroscopy testing equipment to conduct research on metamaterials, semiconductor materials, and so on. However, the unique biological macromolecule recognition properties of terahertz spectroscopy have rarely been truly applied in practice.

The terahertz attenuated total reflection testing module launched by Eachwave is mainly aimed at samples such as cells and tissues with high water content. It can test the absorption spectrum of the terahertz spectrum of the sample through attenuated total reflection. The biological macromolecule fingerprint recognition characteristics of terahertz spectroscopy can be truly applied to the analysis and testing of biological samples. Provide more biological research users with a new and powerful sample analysis research method.

Terahertz attenuation total reflection test, specifically designed to test samples with strong absorption of incident terahertz spectra. The core component of the attenuated total reflection module in the terahertz band is a high resistance silicon block（HRSi）Prism,HRSiIn the terahertz band（0.1-4THz）Having a flat and high refractive index0.1-4THz，HRSiThe refractive index is approximately3.416.

As shown in the figure below, the terahertz beam passes through high refractive index and high resistance silicon(HRSi)Prism, incident on a sample with a small refractive index, where the sample interacts with high resistance silicon(HRSi)Total reflection at the interface, during which terahertz waves are generated(THz)The light beam will have a certain penetration depth in the sample, that is, the evanescent waves generated during total reflection will propagate a certain distance in the sample and ultimately reflect the information of the sample. This method can be used to test samples that have strong absorption of terahertz waves and cannot be tested using conventional transmission or reflection methods (such as biological samples, cell proteins, etc.).

technical parameter

High resistance silicon refractive index	3.416
Sample pool size	25mm*40mm
Sample refractive index requirements	< 2.5
THz beam incidence angle	51.6°

High resistance silicon refractive index dispersion curve

Terahertz attenuation total reflection testing module is used in customers' TDS systems

The ATR module is applied in TDS systems (THz beam parallel, with a diameter of approximately 2cm),