With appropriately selected optical frequencies, pulses of radiation propagating through a system of chemically distinct
and organized components can produce areas of spatially selective excitation. This paper focuses on a system in which
there are two absorptive components, each one represented by surface adsorbates arrayed on a pair of juxtaposed
interfaces. The adsorbates are chosen to be chemically distinct from the material of the underlying surface. On
promotion of any adsorbate molecule to an electronic excited state, its local electronic environment is duly modified, and
its London interaction with nearest neighbor molecules becomes accommodated to the new potential energy landscape.
If the absorbed energy then transfers to a neighboring adsorbate of another species, so that the latter acquires the
excitation, the local electronic environment changes and compensating motion can be expected to occur. Physically, this
is achieved through a mechanism of photon absorption and emission by molecular pairs, and by the engagement of
resonance transfer of energy between them. This paper presents a detailed analysis of the possibility of optically
effecting such modifications to the London force between neutral adsorbates, based on quantum electrodynamics (QED).
Thus, a precise link is established between the transfer of excitation and ensuing mechanical effects.