Abstract
The reflection of a finite duration optical pulse from a semi-infinite nonlocal medium at normal incidence for various ABC’s, and at oblique incidence for Pekar’s ABC, is investigated theoretically. We have obtained explicit expressions for the amplitude of the transient reflected field (local and nonlocal portions) and evaluated them numerically for different ABC’s for normal incidence, and for different polarizations for oblique incidence. The effects of spatial dispersion on the reflected transients associated with the light pulse are important for laser frequency at the vicinity of an exciton-polariton resonance. For various ABC’s, we find quantitative differences in the magnitude; these can be used to analyse different ABC’s experimentally. The time decay of the transients shows oscillatory behavior in the time domain. In the case of oblique incidence, using p-polarization as well as increasing the angle of incidence enhances the spatial dispersion effects and oscillatory response of the medium after the pulse dies out.
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