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We suggest a phenomenological theory of the polarization conversions effect,an excitonic analog of the first-order spatial dispersion phenomena which is,however, observed in the photoluminescence rather than in the passing light.The optical polarization response of a model system of electrically neutralquantum dots subject to the magnetic field along the growth axis was calculatedby means of the pseudospin method. All possible forms of the polarizationresponse are determined by nine different field-dependent coefficients whichrepresent, therefore, a natural basis for classification of a variety ofconversions. Existing experimental data can be well inscribed in thisclassification scheme. Predictions were made regarding two effects which havenot been addressed experimentally.

Angular harmonics of the excitonic polarization conversions effect