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Nanowires

Theses/Dissertations

University of Pennsylvania

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Semiconductor Nanowires: Optical Properties And All-Optical Switching, Brian Edward Piccione Jan 2012

Semiconductor Nanowires: Optical Properties And All-Optical Switching, Brian Edward Piccione

Publicly Accessible Penn Dissertations

The optical properties of semiconductor nanowires are both important from a fundamental materials physics standpoint and necessary to understand in engineering applications: nanowire photovoltaic devices, sensors, and lasers, among others, could all benefit. Unfortunately, these optical properties are not easy to ascertain. Transmission times are short, in-coupling of white probe light is difficult, and the angle-resolved measurements typically used to determine material dispersion relations in bulk materials are hindered by diffraction effects at subwavelength nanowire end facets.

Here, we present a series of experimental techniques and theoretical models developed to study of the optical properties of active nanowire waveguides. Beginning ...