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We present the results of a high-time resolution polarization study of singlepulses from pulsars B0950+08 and B1642-03. Single pulses from pulsar B0950+08sometimes show isolated micropulses without any significant associated subpulseemission. Assuming that the properties of such micropulses represent theintrinsic nature of micropulse emission, we characterize the width andpolarization properties of these `intrinsic' microstructures. Most of the`intrinsic' micropulses (~90%) follow common characteristic polarizationproperties, while the average width of these micropulses is consistent with thegeneral micropulse population from this pulsar. Single pulses from thesepulsars show a diverse range of polarization properties, includingdepolarization and mixing of two orthogonal modes resulting in polarizationposition angle jumps. We present a superposition model of the two orthogonalmodes which can explain depolarization, the observed position angle jumps, andassociated changes in other polarization parameters.

Single pulse polarization study of pulsars B0950+08 and B1642-03: micropulse properties and mixing of orthogonal modes