Polarized Light Absorption in Wurtzite InP Nanowire Ensembles

De Luca, M. and Zilli, A. and Fonseka, A. and Mokkapati, S. and Miriametro, A. and Tan, H. and Smith, L. and Jagadish, C. and Capizzi, M. and Polimeni, A.. (2015) Polarized Light Absorption in Wurtzite InP Nanowire Ensembles. Nano Letters, 15 (2). pp. 998-1005.

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Official URL: http://edoc.unibas.ch/41006/

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We investigate the absorption properties of ensembles of wurtzite (WZ) InP nanowires (NWs) by high-resolution polarization-resolved photoluminescence excitation (PLE) spectroscopy at T = 10 K. The degree of linear polarization of absorbed light, ρ(abs), resulting from the PLE spectra is governed by a competition between the dielectric mismatch effect and the WZ selection rules acting differently on different optical transitions. These two contributions are deconvoluted with the help of finite-difference time-domain simulations, thus providing information about the symmetry of the three highest valence bands (A, B, and C) of WZ InP and the extent of the spin-orbit interaction on these states. Moreover, ρ(abs) shows two characteristic dips corresponding to the two sharp A and B exciton resonances in the PLE spectra. A model developed for the dip in A provides the first experimental evidence of an enhancement in the dielectric mismatch effect originating from the Coulomb interaction between electron and hole.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Material Physics (Zardo)
UniBasel Contributors:De Luca, Marta
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Oct 2017 07:36
Deposited On:12 May 2016 06:51

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