It has been found using Raman spectroscopy that metastable Si phases reversibly appear in silicon microparticles (mu-Si) due to local heating on increasing the power of a He-Ne excitation laser from 0.03 to 3 mW. Prolonged annealing of these phases by laser radiation makes it possible to estimate that local heating occurs to a temperature of similar to 250 degrees C rather than 1000 degrees C as it was believed previously.
展开▼
