Abstract
AbstractThe transmission of optical femtosecond pulses through ZnSe/ZnSxSe1−x heterostructures is investigated in both the spectral and the temporal domain. Quantization of the polariton wave vector withinthe thin ZnSe layers (23 to 100 nm) leads to a variety of allowed propagating modes which are clearly resolved in transmission spectra. Interference of all contributing modes gives rise to a very pronounced and complex temporal beating behavior of the transmitted pulses measured with femtosecond resolution. The transmission spectra as well as the transients taken from different samples are consistently described by a model based on three‐oscillator polariton theory using Pekar's additional boundary conditions.
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