| abstract |
The method comprises irradiating samples with radiation having plurality of frequencies in the range of 25 GHz to 20 THz, and alternatively up to 120 THz, detecting radiation reflected from or transmitted by the sample (49) to obtain a spectra which is THz signature of the sample, hence, identifying intermolecular or intra-molecular interactions in the sample. The radiation maybe a pulse laser (21) or a continuous wave (CW). The method can additionally derive the refractive index of the sample. Sample can be held at maximum temperature of 10K. The sample may be powderized, and mixed with inert material, and can be under vacuum, under dry nitrogen, under dry air or located in plastic bags. The sample spectra is compared with known spectra of molecules, making all various polymorphs identifiable. |