The Raman scattering by phonons from individual single- and multi-component semiconducting nanowires and nanocones exhibits a number of noteworthy features owing to the finite size and shape of the nanowire^1,2.  In this presentation I will present and discuss our recent experimental and theoretical work involving remarkably strong enhancements of the spontaneous Raman scattering from these nanostructures, as compared with bulk Si, including the diameter, excitation wavelength and optical polarization dependence. Application of these findings to surface enhanced Raman scattering by molecules chemisorbed on hybrid metal-semiconductor nanostructures and its implications for chemical sensing will also be presented and discussed.  Work supported by the US Army Research Office.

¹L. Cao, B. Nabet and J. E. Spanier, Phys. Rev. Lett. 29, 157402 (2006).

²L. Cao, B. Garipcan, E. Piskin, B. Nabet and J. E. Spanier, Nano Lett. 8, 601 (2008).

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