Polarized Photouminescence from Single Wurtzite and Zincblende InP Nanowires

ORAL

Abstract

We use polarized photoluminescence spectroscopy of single InP nanowires to compare the optical properties of vapor-liquid-solid growth of single zincblende (ZB) and wurtzite (W) nanowires. Since ZB and W nanowires have different symmetries and selection rules, their optical properties should also be different. The emission from single W nanowires is observed to be $\sim $80 meV higher than for ZB nanowires. Low temperature polarization measurement shows that ZB nanowires are strongly polarized along the nanowire axis, while the W nanowires are polarized perpendicular to the NW axis. The temperature dependence of the ZB and W NW emissions are compared with a bulk InP epilayer. Apart from the 80meV shift in bandgap, the temperature dependencies are similar.

*Support for this work was provided by NSF (\#0701703) and the Australian Research Council.

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Authors

  • A. Mishra

    • University of Cincinnati

  • L.V. Titova

    • University of Cincinnati

  • T.B. Hoang

    • University of Cincinnati

  • H.E. Jackson

    • University of Cincinnati

  • L.M. Smith

    • University of Cincinnati

  • J.M. Yarrison-Rice

    • Miami University

  • Y. Kim

    • Australian National University

  • H.J. Joyce

    • Australian National University

  • Q. Gao

    • Australian National University

  • H.H. Tan

    • Australian National University

  • C. Jagadish

    • Australian National University