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Sum frequency generation from planar and porous silicon in contact with liquids
Author(s) -
Kolasinski Kurt W.,
DeWitt Kristy M.,
Harrison Ian
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200674335
Subject(s) - porous silicon , aqueous solution , silicon , ultrashort pulse , planar , porosity , materials science , sum frequency generation , pulse (music) , hydrogen , ethanol , analytical chemistry (journal) , chemical engineering , chemistry , optoelectronics , optics , nonlinear optics , organic chemistry , detector , composite material , engineering , laser , computer graphics (images) , computer science , physics
Sum frequency generation (SFG) involving an ultrafast infrared pulse and a 787 nm up‐conversion pulse mixed at the surface of planar or porous Si as well as planar GaAs has been studied. We demonstrate that SFG data can be obtained while porous silicon is in contact either with an aqueous solution or ethanol. The nonresonant SFG signal responds to the chemical composition of the interface. It is also found that ultrafast 787 nm pulses can induce photochemistry between hydrogen‐terminated porous silicon and either aqueous HCl, ethanoic HF, or ethanol. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)