Phase-stepping interferometry of GaAs nanowires: Determining nano-wire radius

D. J. Little*, R. L. Kuruwita, A. Joyce, Q. Gao, T. Burgess, C. Jagadish, D. M. Kane

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    6 Citations (Scopus)

    Abstract

    Phase stepping interferometry is used to measure the size of near-cylindrical nanowires. Nanowires with nominal radii of 25 nm and 50 nm were used to test this by comparing specific measured optical phase profile values with theoretical values calculated using a wave-optic model of the Phase stepping interferometry (PSI) system. Agreement within 10% was found, which enabled nanowire radii to be predicted within 4% of the nominal value. This demonstration highlights the potential capability for phase stepping interferometry to characterize single nanoparticles of known geometry in the optical far-field.

    Original languageEnglish
    Article number161107
    JournalApplied Physics Letters
    Volume103
    Issue number16
    DOIs
    Publication statusPublished - 14 Oct 2013

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