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Second-harmonic generation imaging of semiconductor nanowires with focused vector beams

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)1564-1569
Number of pages6
JournalNano Letters
Volume15
Issue number3
DOIs
Publication statusPublished - 6 Feb 2015
Publication typeA1 Journal article-refereed

Abstract

We use second-harmonic generation (SHG) with focused vector beams to investigate individual vertically aligned GaAs nanowires. Our results provide direct evidence that SHG from oriented nanowires is mainly driven by the longitudinal field along the nanowire growth axis. Consequently, focused radial polarization provides a superior tool to characterize such nanowires compared to linear polarization, also allowing this possibility in the native growth environment. We model our experiments by describing the SHG process for zinc-blende structure and dipolar bulk nonlinearity.

Keywords

  • modeling, nonlinear imaging, radial polarization, Second-harmonic generation, semiconductor

Publication forum classification

Field of science, Statistics Finland