Abstract
Polarization-modulated infrared reflection difference microspectroscopy is a sensitive tool to spatially and spectrally resolve optical anisotropy of micrometric crystalline domains. However, intrinsic artifacts are associated with polarization modulation experiments, in particular due to the wavenumber-dependent efficiency of the photoelastic modulator. Here an account addressing this problem in our experimental approach is given. Comparing data from measurements on Ca 1.4Sr 0.6RuO 4 and Bi 0.3Ca 0.7MnO 3+ δ with model calculations, it is shown that a simple model, which is based on reports in the literature, can be used to describe the experimental results.
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