Red Shift of the Raman (FBCARS) Excitation Profile of Iodine from the Absorption Spectrum(￥°)

摘要

Folded Box coherent anti-Stokes Raman spectroscopy (FBCARS) spectra of the fundamental symmetric stretch(213 cm-1) and the first overtone(421 cm-1) of I2 have been recorded over the pump wavelength range from 495 nm to 580 nm. The lineshapes were fitted using the least squares method and the A and C term of CARS were calculated. From the fitting of A and C terms, the real(R) and imaginary(I) term intensity of CARS were calculated using harmonic oscillator program. The calculated CARS excitation profile of I2 with R and I term data was about 270 cm-1 red shifted from the absorption spectrum.