Abstract
Optical transmission and emission spectra in the region of the plasma frequencyω p were measured on thin potassium films evaporated on sapphire substrates of various temperatures. For the foils condensed at a temperatures of the substrateT a <−165 °C transmission spectra were observed which are in good agreement with the calculated ones. No plasma resonance emission was detectable since the foils were not rough. For the foils obtained atT a >−165 °C transmission spectra were observed which transmission minima are displaced to frequencies less thanω p . Plasma resonance emission was observed from these foils. Comparison with calculated emission spectra gives an approximate agreement.
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Herrn Prof. Dr. H.Raether danke ich für die Anregung dieser Arbeit und für viele wertvolle Hinweise und Diskussionen.
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Bösenberg, J. Plasmaresonanzemission und Plasmaresonanzabsorption an dünnen Kaliumschichten. Z. Physik 218, 282–297 (1969). https://doi.org/10.1007/BF01458410
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DOI: https://doi.org/10.1007/BF01458410