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Chapter 5. Nanostructured hybrid systems 138time2.5 x 2.5 !m 220080129_11_6A (nm)0-20-400 1 2X (!m)(e)2.5 x 2.5 !m 220080129_11_5A (nm)0-20-400 1 2X (!m)(d)pastel-00527388, version 1 - 19 Oct 201002.5 x 2.5 !m 2P interf.ON2.5 x 2.5 !m 220080129_11_420080129_11_3I/I 0 !A (nm)A (nm)4200201 20-200 1 2(c)X (!m)200-200 1 2X (!m)(b)OPTICS20080129_11_2A (nm)2005 x 5 !m2-200 5X (!m)(a)TOPOGRAPHYFigure 5.1: Gold nanopartic<strong>les</strong> on sol-gel Si-DR1 (≃ 200 nm thick). Particle diameter= 20 − 30 nm. (a) 5 × 5 µm shear-force topography image; (b-e) left side: 2.5 ×2.5 µm topography images during exposure to p-polarized interfering beams; middle:topography profile corresponding to the vertical cut reported in each figure. The opticalimage is shown for the first 200 s of illumination, in (c), right side. In the middle, wereport the optical (top) and topographical (bottom, gray dotted curve) profi<strong>les</strong>. Notethe spatial half-a-period shift between the SRG and the interference pattern. Laserwavelength = 473 nm, power density = 1 mW/mm 2 per beam, incidence angle =16.5 ◦ , spatial period ≃ 830 nm.

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