Revisiting the basic theory of sum-frequency generation
| Autor: | Y. R. Shen |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Interface layer
Physics Sum-frequency generation 010304 chemical physics Interface (Java) General Physics and Astronomy 010402 general chemistry Interference (wave propagation) 01 natural sciences Physics::Geophysics 0104 chemical sciences Dipole Reflection (mathematics) Transmission (telecommunications) Quantum mechanics 0103 physical sciences Quadrupole Physical and Theoretical Chemistry |
| Zdroj: | The Journal of chemical physics. 153(18) |
| ISSN: | 1089-7690 |
| Popis: | The basic theory of sum-frequency generation (SFG) is revisited. A rigorous derivation showing that linear optical transmission and reflection at an interface result from the interference of the incident wave and induced radiation wave in a medium is presented. The derivation is extended to SFG in a medium with a finite interface layer to see how SFG evolves. Detailed description on interface vs bulk and electric dipole (ED) vs electric quadrupole (EQ) contribution to SFG are provided with essentially no model dependence, putting the theory of SFG on a solid ground and removing possible existing confusions. Electric-quadrupole contributions to SFG from the interface and bulk are discussed. It is seen that there is a relevant bulk EQ contribution intrinsically inseparable in measurement from the interface ED contribution but plays a major role among all EQ contributions; its importance relative to the ED part can only be judged by referring to the established reference cases. |
| Databáze: | OpenAIRE |
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