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On the interactions between molecules in an off-resonant laser beam: Evaluating the response to energy migration and optically induced pair forces
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View: Figures


Image of FIG. 1.
FIG. 1.

Both possible time-ordered Feynman representations of the static coupling between molecules and through the propagation of a single virtual photon, time progressing upwards.

Image of FIG. 2.
FIG. 2.

Feynman diagrams illustrating RET by virtual photon transfer. Diagram (a) illustrates virtual photon creation at and subsequent annihilation at with diagram (b) representing the opposite evolution.

Image of FIG. 3.
FIG. 3.

Three of 12 distinct time-ordered representations of the fourth-order dispersion force. Process involves migration of two virtual photons from and or one from each.

Image of FIG. 4.
FIG. 4.

Two of the 48 distinct illustrations of the fourth-order optically induced pair force. Represented above are (a) real photon absorption at coupled by migration of a virtual photon annihilated at , with stimulated re-emission of a real photon back into the auxiliary field. The opposite process is represented by (b).

Image of FIG. 5.
FIG. 5.

One of the Feynman diagrams representing fourth-order LARET; a process mediated by a single virtual photon in the presence of throughput, off-resonant radiation assisting energy exchange between donor and acceptor.

Image of FIG. 6.
FIG. 6.

Jablonski diagram, rate constants denoting processes determining the excited populations of molecules and . These processes involve among others, the spontaneous emission of photons from and lower energy emission (owing to IVR) of from .

Image of FIG. 7.
FIG. 7.

Representative and population profiles, (a) and (b), respectively, following initial pulsed laser excitation. Values of and are chosen such that accounts for approximately 80% of the total decay of . Total rate of energy transfer is modestly increased by 50% through ; and are taken as equal.

Image of FIG. 8.
FIG. 8.

Evolution of the optically modified donor-acceptor interaction as a function of time, highlighting system response to RET, LARET, and optically induced forces.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: On the interactions between molecules in an off-resonant laser beam: Evaluating the response to energy migration and optically induced pair forces