Surface plasmon resonance has been investigated in a quantum well (QW) GaAs microstructure the photoluminescence (PL) of which is coupled via a submicrometer period grating with surface plasmons (SPs) propagating at -dielectric interfaces. Introduction of the layer allowed to increase both the propagation length and the penetration depth of SPs and, consequently, achieve their enhanced interaction with the QW PL signal. For a QW microstructure emitting at , a modulated PL emission has been observed in agreement with the calculated resonance conditions expected for such a microstructure and the period grating.
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