Micro-Raman Spectroscopy (µ-Raman)

During the inelastic interaction between light and a molecule the polarizability of the molecule changes which shifts the oscillation frequency from that of the input field, and the shifted oscillation act as a source of secondary radiation, which is observed by Raman spectroscopy.  Chemical bonds and thin film composition and strains are analyzed by Raman spectroscopy. 2-D impurities mapping are also possible with Raman microscopy.
Instruments:
DXR Raman from Thermo Fisher Scientific with Olympus BX51 microscope and Linkham LN2 cooling stage system, which has the following specification:

• DXR dispersive microscope with bright field optical illumination
• 532 nm depolarized laser module
• Spatial resolution down to 1 micron
•  Confocal depth profiling resolution down to 2 microns
• Full range spectrum in a single exposure eliminates stitching artifacts
•  Spectral resolution of 5 cm-1 standard with high-res mode with 3 cm-1 resolution available from 50 to 1800 cm-1
• Sample cooling stage (down to 77K) to avoid any room temperature vibrational features
• Computer controlled stages and spectral acquisition and data analysis software

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