Perturbative description of extra resonances in cars

✍ Scribed by Roger J. Carlson; John C. Wright

• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 576 KB
• Volume: 140
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(87)80424-4

✦ Synopsis

Resonance coherent anti-Stokes Raman scattering (CARS) spectra contain peaks that have been interpreted as originating from populated excited states induced by the applied field. Fifth-order perturbation theory is used here to show that the induced dipole contribution to these extra resonances exactly cancels that from induced excited-state populations in the absence of pure dephasing. The theory is also used to describe CARS line narrowing in inhomogeneously broadened systems and the experimentally observed extra resonances are interpreted as line narrowed vibronic transitions.