Article Title

Exploring the band structure of Wurtzite InAs nanowires using photocurrent spectroscopy

Authors

Seyyedesadaf Pournia, Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA
Samuel Linser, Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA
Giriraj Jnawali, Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA
Howard E. Jackson, Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA
Leigh M. Smith, Department of Physics, University of Cincinnati, Cincinnati, OH 45221-0011, USA
Amira Ameruddin, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
Philippe Caroff, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
Jennifer Wong-Leung, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
Hark Hoe Tan, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
Chennupati Jagadish, Department of Electronic Materials Engineering, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia
Hannah J. Joyce, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, UK

Keywords

nanowires, Wurtzite InAs, photocurrent measurement, optical selection rules, energy band structure

Abstract

We use polarized photocurrent spectroscopy in a nanowire device to investigate the band structure of hexagonal Wurtzite InAs. Signatures of optical transitions between four valence bands and two conduction bands are observed which are consistent with the symmetries expected from group theory. The ground state transition energy identified from photocurrent spectra is seen to be consistent with photoluminescence emitted from a cluster of nanowires from the same growth substrate. From the energies of the observed bands we determine the spin orbit and crystal field energies in Wurtzite InAs. This information is vital to the development of crystal phase engineering of this important III-V semiconductor.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-020-2774-0

Publisher

Tsinghua University Press

Recommended Citation

Seyyedesadaf Pournia,Samuel Linser,Giriraj Jnawali,Howard E. Jackson,Leigh M. Smith,Amira Ameruddin,Philippe Caroff,Jennifer Wong-Leung,Hark Hoe Tan,Chennupati Jagadish,Hannah J. Joyce, Exploring the band structure of Wurtzite InAs nanowires using photocurrent spectroscopy. NanoRes.2020, 13(6): 1586–1591