High refractive index in wurtzite GaP measured from Fabry-Pérot resonances

Journal article (2016)

Authors

S Assali Eindhoven University of Technology
D van Dam Eindhoven University of Technology
Jos E.M. Haverkort Eindhoven University of Technology
E.P.A.M. Bakkers Eindhoven University of Technology, QN/Bakkers Lab
Research Group
QN/Bakkers Lab
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Published Date

2016

Language

English

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Research Group

QN/Bakkers Lab

Abstract

We investigate the optical emission of wurtzite GaP/Al0.4Ga0.6P core/shell nanowires (NWs) transferred to a SiOx substrate to demonstrate a high degree of waveguiding of the emitted photoluminescence (PL) signal. By analysing the Fabry-Pérot mode spacing in combination with calculations of the guided modes in the NWs, we calculate a very high refractive index of bulk WZ GaP of 4.2 at a wavelength of 600 nm. The measured quality factors up to 600 indicate the excellent optical quality of the nanowire resonator.