Computational Nanophotonics

6.3.1.1  Raman Effect

Raman effect is observed during an inelastic scattering of a photon [48]. In the present context, Raman scattering from a nanodot is considered, and the process is illustrated in Figure 6.2. When a light source, typically a laser, is applied on a nanodot, a photon with energy ω_i is incident upon it, and a photon with energy ω_f emits from it due to scattering. The nanodot undergoes Raman effect if the energy ω_f of the emitted photon is different from that of the incident one (i.e., ω_i) (the case of inelastic scattering). The difference between ω_i and ω_f determines the type of Raman scattering. Within the context, ω_f < ω_i gives Stokes scattering, as illustrated in Figure 6.3a. There is no Raman effect corresponding to the ...