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We present the first comparative study of spatially resolved near-field photocurrent spectra for high power laser diode arrays with different wave guide characteristics before and after accelerated aging of the laser device. Sub-wavelength spatial resolution is demonstrated by using anear-field fiber probe as the excitation source. The potential of the technique for analyzing microscopic aging processes...
Abstract.Optical properties in the spectral range from 0.06 to 5.5eV of fullerite films on different substrates, C60 powder, and dissolved fullerene material are investigated by spectroscopic ellipsometry and optical transmission and reflection measurements. Depolarization effects are taken into account during determination of the dielectric function of fullerite films by ellipsometry. The optical...
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