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Mode-selective phonon excitation induced by MIR-FEL laser irradiation on a bulk 6H-SiC has been investigated by anti-Stokes (AS) Raman scattering spectroscopy using pico-second laser. We observed a clear peak at 965 cm−1 which corresponds to the absorption energy of the lattice vibration of 6H-SiC when the pump laser wavelength was 10.4 μm (962 cm−1). However, two peaks were observed by slightly detuned...