Optical detection of benzene fragmentation in IR and visible-UV laser-induced processes

Abstract

Summary. --A broad-band CARS set-up has been employed to investigate on-line benzene fragmentation due to multiple-photon processes induced by different laser radiation in IR (COe-laser), in the visible (II harmonic Nd:YAG laser) and in the UV (N2 laser). Collisional induced formation of C2 has been demonstrated also in the absence of optical breakdown. PACS 42.65.Dr -Stimulated Raman scattering and spectra; CARS.

On-line gas-phase optical diagnostics in plasma CVD deposition of carbon films

“…All these optical diagnostics have been previously applied in our laboratory 9 to similar problems concerning gas-phase diagnostics during different laser induced processes, such as ultrafine powder synthesis, 10 decomposition of pollutants, 11 and ablation for thin film deposition. 12 In a very recent paper Hay et al 13 used narrow-band CARS diagnostics in monitoring diamond deposition both in a CVD reactor at high rf-power and a hot filament reactor.…”