The stress in porous silicon during exposition to a liquid is investigated by an approach based on Raman scattering. When the porous silicon structure is exposed to isopropanol or ethanol, a reversible blue shift of the Raman spectra is observed. The blue shift of Raman scattering is ascribed to the contraction induced by the liquids that fill the pores.
International Society for Optics and Photonics
2 Jul 2007
Volume: 6619 Pages: 661913
Third European Workshop on Optical Fibre Sensors