Raman spectrometer
Photon etc.
Photon etc has designed two narrowband tunable filters for resonance Raman spectroscopy (RRS). These matched tunable passband and notch filters, based on thick volume Bragg gratings, exhibit a bandwidth less than 10cm-1 and cover a wavelength range of several hundred nanometers. Raman spectroscopy (RS) is a powerful tool to study the vibrational, optical, and electronic properties of materials in a nondestructive manner. Raman signals are typically orders of magnitude lower than the intensity of the excitation laser line. However, it is possible to significantly increase Raman signals by choosing an excitation wavelength that corresponds to an optical transition of the material under investigation. Resonant Raman Spectroscopy provides a unique tool to characterize the diameter and chirality distribution of a mixed population of carbon nanotubes (CNT). RRS is also a powerful method to monitor in-situ the CNT properties during growth. Thus, it can serve as a diagnosis tool in order to achieve better control of the CNT production.
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