Stimulated Raman scattering in between nano and biophotonics applications.
D'Arco A., Ferrara M.A., Indolfi M., Sirleto L.
Nonlinear optics at nanoscale is a recent fascinating research field of great importance. Nanostructured silicon has generated large interest in the past decades as a promising key material to establish a Si-based photonics. We report the first observation of a giant Raman gain from the silicon nanocrystals that is up to four orders of magnitude greater than in crystalline silicon. In life science, Coherent Raman microscopy can be used as contrast mechanism based on vibrational properties. Femtosecond stimulated Raman spectroscopic and microscopy implementation are described. Label free imaging of polystyrene-beads and adipocyte cells are demonstrated.