Exploring the band structure of Wurtzite InAs nanowires using photocurrent spectroscopy
Date
2020
Authors
Pournia, Seyyedesadaf
Linser, Samuel
Jnawali, Giriraj
Jackson, Howard E
Smith, Leigh M
Ameruddin, Amira
Caroff, Philippe
Wong-Leung, Jennifer
Tan, Hark Hoe
Jagadish, Chennupati
Journal Title
Journal ISSN
Volume Title
Publisher
Tsinghua Univ Press
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.
Description
Keywords
nanowires, Wurtzite InAs, photocurrent measurement, optical selection rules, energy band structure
Citation
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Source
Nano Research
Type
Journal article
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Restricted until
2099-12-31