Sum-frequency generation from surface species in porous silicon

Giorgio MATTEI, Veronica VALENTINI, Vladimir YAKOVLEV, Alaa Addin Mani, Yannick Sartenaer, Paul Thiry, André Peremans, Yves Caudano, Laurent Dreesen, Christophe Humbert, Bertrand BUSSON, Franck VIDAL, Abderrahmane TADJEDDINE

Research output: Contribution to journalArticle


For the first time, the sum-frequency generation (SFG) spectra of surface species have been measured in porous silicon (PS) layers. The range of the vibrations 2000-2300 cm-1 for the native species Si-Hx has been explored. Furthermore for the studied mesoporous materials, it has been found that, as opposed to the infrared absorption, the SFG signal increases with porosity. Finally, the angular dependence and the enhancement of the SFG signal were measured in a one-dimensional PS photonic crystal structure with a defect producing an energy level in the photonic band gap.
Original languageEnglish
Pages (from-to)1487-1491
Number of pages5
JournalPhysica Status Solidi A -Applications and Material Science
Issue number8
Publication statusPublished - 2005


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