Control of Cross-Sections and Optical Nonlinearity of Pt Nanowires and the Roughness Effect

Figure 6

SHG intensity from Pt nanowires with elliptic ((a)–(d)) and boomerang ((e)–(h)) cross-sectional shapes on the MgO(110) faceted template for ℏ𝜔=2.33eV as a function of the sample rotation angle 𝜑 for four different input and output polarization configurations indicated at the top. The sample rotation angle 𝜑 is defined as the angle between the incident plane and the [001] (direction 1) or the nanowire axis. The solid curves are the best-fit theoretical patterns calculated with independent effective nonlinear susceptibility 𝜒⁽²⁾ elements as adjustable parameters [18].

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