Significance: Mueller matrix (MM) polarimetry is a promising tool for the detection of skin cancer. Polarimetric in vivo measurements often suffer from misalignment of the polarimetric images due to motion, which can lead to false results.Aim: We aim to provide an easy-to-implement polarimetric image data registration method to ensure proper image alignment.Approach: A feature-based image registration is implemented for an MM polarimeter for phantom and in vivo human skin measurements.Results: We show that the keypoint-based registration of polarimetric images is necessary for in vivo skin polarimetry to ensure reliable results. Further, we deliver an efficient semiautomated method for the registration of polarimetric images.Conclusions: Image registration for in vivo polarimetry of human skin is required for improved diagnostics and can be efficiently enhanced with a keypoint-based approach.
We present measurement and simulation results of local surface plasmon resonances on silver nanoantenna
structures, fabricated with electron beam lithography. Such structures offer interesting possibilities to study
strong coupling phenomena between surface plasmon polaritons (SPP) and, e.g., quantum dots, along the lines
of our previous work on vacuum Rabi splitting for SPP and dye molecules.
We report on strong coupling between surface plasmon polaritons and Rhodamine 6G molecules at room temperature.
As a reference to compare with, we first determine the dispersion curve of (uncoupled) surface plasmon
polaritons on a 50 nm thick film of silver. Consequently, we determine the dispersion curve of surface plasmon
polaritons strongly coupled to Rhodamine 6G molecules, which exhibits vacuum Rabi splitting. Furthermore,
we present spontaneous emission spectra of Rhodamine 6G on silver, which are shown to change with detector angle due to surface plasmon polariton generation by Rhodamine 6G molecules.
We report on strong coupling between surface-plasmon polaritons and Rhodamine 6G molecules at room temperature.
As a reference to compare with, we first determine the dispersion curve of (uncoupled) surface plasmon
polaritons on a 50 nm thick film of silver. Consequently, we determine the dispersion curve of surface plasmon
polaritons strongly coupled to Rhodamine 6G molecules, which exhibits vacuum Rabi splitting. Depending on
the Rhodamine 6G concentration, we find splitting energies between 0.05 eV and 0.13 eV.
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