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

Godofredo Bautista, Jouni Mäkitalo, Ya Chen, Veer Dhaka, Marco Grasso, Lasse Karvonen, Hua Jiang, Mikko J. Huttunen, Teppo Huhtio, Harri Lipsanen, Martti Kauranen

    Research output: Contribution to journalArticleScientificpeer-review

    53 Citations (Scopus)

    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.

    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

    Keywords

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

    Publication forum classification

    • Publication forum level 3

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Bioengineering
    • General Chemistry
    • General Materials Science
    • Mechanical Engineering

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