Identification and analysis of materials and molecular structures

A method for identification and analysis of materials and molecular structures comprising:

• providing a laser excitation source;
• providing a plurality of filters, the plurality of filters including at least one reflective blocking filter with a transition width of <50 cm−1;
• providing at least one optical unit delivering excitation energy to a sample substance and capturing a Raman signal scattering from the sample substance, the captured Raman signal being at least in a spectral range of +20 cm−1 to +200 cm−1 or −20 cm−1 to −200 cm−1;
• providing an optical spectrometer disposed in a path of the Raman signal, the optical spectrometer measuring a spectrum of the Raman signal and generating a detection signal, the optical spectrometer collecting low-frequency Stokes or anti-Stokes Raman spectra, the low-frequency Stokes or anti-Stokes Raman spectra being in a +20 cm−1 to +200 cm−1 or −20 cm−1 to −200 cm−1 Raman spectrum;
• and
• providing a processing unit configured to analyze the captured Raman signal within the +20 cm−1 to +200 cm−1 or −20 cm−1 to −200 cm−1 portion of a spectrum of the sample substance, the analyzing of the +20 cm−1 to +200 cm−1 or −20 cm−1 to −200 cm−1 portion of the spectrum of the sample substance including measuring changes to at least one of peak shape and peak locations associated with structural characteristics or changes in form.