Probing valence band structure in wurtzite InP nanowires using excitation spectroscopy

Perera, S.; Pemasiri, K.; Fickenscher, M. A.; Jackson, H. E.; Smith, L. M.; Yarrison-Rice, J.; Paiman, S.; Gao, Q.; Tan, H. H.; Jagadish, C.
July 2010
Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p023106
Academic Journal
We use time-resolved photoluminescence spectroscopy and photoluminescence excitation spectroscopy to measure the valence band parameters of hexagonal wurtzite InP nanowires. The A exciton emission and excitation energy is observed at 1.504 eV as expected. Excitation spectra show that the B and C hole bands are 30 and 161 meV above the A hole band. From these measurements, we obtain the crystal field and spin-orbit energies of 52 meV and 139 meV, respectively.


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