Polarization propagation of a monochromatic plane wave through layered thin film dielectric media is described using an electric and magnetic field component spinor while the transformation of fields at a dielectric interface is effected using the characteristic matrix for each layer. The characteristic matrix is rendered in a representation of the Pauli spin matrices and expressions constructed for the change of polarization field components. The matrix representation describes a pseudo-spinor rotation of the field components the magnitude of which is given by the phase thickness of the stack and the direction of rotation given by a vector expressed in terms of an optical admittance dependent on the index of refraction and angle of incidence. This method provides a useful and simple calculation procedure for polarization propagation phenomena in optical problems along with potential applications to surface characterization.
Time-resolved fluorescence measurements have been performed on benign and
malignant breast tissue samples using 310 excitation of a 100 fs pulse. Fluorescence decay
times were found to be double exponential. The 340nm band of benign and malignant
tissues displayed differences in the slow components of lifetime and the ratio of the fast
to the slow components.
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