A quantum well excited by a rectangular grating is studied as a prototype of optical systems showing periodicity and spatial-dispersion effects. The optical nonlocal response of this system is computed and compared with the optical response of a quantum well excited by a prism in attenuated total reflection and with the ``equivalent-slab model'' of the grating. Additional effects due to the interplay between exciton-polaritons and confined electromagnetic modes are pointed out in such kinds of systems. The measured polarization dependence of photoluminescence from quantum-well excitons excited through a grating is explained. {} 1996 The American Physical Society.
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Pilozzi et al. (1996) studied this question.
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