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

S. Assali, D. van Dam, J.E.M. Haverkort, E.P.A.M. Bakkers

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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.

Original languageEnglish
Article number173101
Pages (from-to)1-3
JournalApplied Physics Letters
Issue number17
Publication statusPublished - 25 Apr 2016


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