The third harmonic of a YAG laser with wavelength at 355 nm dissociated PbI2 and induced Raman Stokes and anti-Stokes scattering between two photolytic atomic metastable states of Pb. Because of the energy transfer from the 6p23P2 to the high vibrational state of molecules such as N2, CO2, the final state of Raman scattering 6p23P2 was emptied, while the initial state 6p23P1 was more populated. This process led to increasing the intensity of Raman scattering. Especially, the 2nd-order Stokes component at 444 nm increased by three orders of magnitude. Furthermore, the 2nd harmonic of the YAG laser was used to exhaust directly the 6p23P2 state. Those two desxcitation methods were compared. Besides, an anomalous emission with wavelength at 712 nm was discussed.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry
- Electrical and Electronic Engineering