Optical absorption in porous silicon studied by photoacoustic spectroscopyстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Nanoporous Si layers have been investigated by photoacoustic (PA) spectroscopy. The optical absorption spectra for porous Si on p-type Si substrates were obtained in the region of 300 to 1500 nm. The absorptivity became remarkable at 600 nm and increased drastically up to the saturation value while the wavelength decreased from 500 to 300 nm. On the basis of the comparison of photoacoustic spectra registered for different light modulation frequencies the value of thermal conductivity of porous Si was estimated to be 1.55 x 10(-3) W/(cm K).