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Sum frequency generation from planar and porous silicon in contact with liquids

✍ Scribed by Kolasinski, Kurt W. ;DeWitt, Kristy M. ;Harrison, Ian

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
218 KB
Volume
204
Category
Article
ISSN
0031-8965

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✦ Synopsis

Abstract

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)

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