The Impact of Doping on the Anti-Resonance Effects of A^1_1g Mode of Inse

A comparative study of antiresonance effects in inse and inse doped with gas, using the resonant raman spectroscopy is presented. the nonpolar optical phonon of a^1_1g symmetry in inse exhibits a pronounced decrease in the raman cross-section at excitation energy 2.585 ev. in inse doped with gas samples, it is found that the anti-resonance behavior decreases as doping contents are increased. to account these observations, a model is applied to explain and interpret the raman intensity evolution versus incident photon energy. the agreement between theory and experiment is good.