Volume 111, Number 2, July 2015
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||19 August 2015|
Blue-to-green single photons from InGaN/GaN dot-in-a-nanowire ordered arrays
1 Instituto Nicolás Cabrera and Instituto de Física de Materia Condensada (IFIMAC), Universidad Autónoma de Madrid - Francisco Tomás y Valiente 7, 28049 Madrid, Spain
2 ISOM-DIE, Universidad Politécnica de Madrid - Avenida Complutense 30, 28040, Madrid, Spain
3 Institute of Experimental Physics, Otto-von-Guericke-University - Universitätsplatz 2, 39106 Magdeburg, Germany
4 Centro Nacional de Microscopía Electrónica, Universidad Complutense de Madrid - Avenida Complutense s/n, 28040, Madrid, Spain
Received: 15 July 2015
Accepted: 28 July 2015
Single-photon emitters (SPEs) are at the basis of many applications for quantum information management. Semiconductor-based SPEs are best suited for practical implementations because of high design flexibility, scalability and integration potential in practical devices. Single-photon emission from ordered arrays of InGaN nano-disks embedded in GaN nanowires is reported. Intense and narrow optical emission lines from quantum dot-like recombination centers are observed in the blue-green spectral range. Characterization by electron microscopy, cathodoluminescence and micro-photoluminescence indicate that single photons are emitted from regions of high In concentration in the nano-disks due to alloy composition fluctuations. Single-photon emission is determined by photon correlation measurements showing deep anti-bunching minima in the second-order correlation function. The present results are a promising step towards the realization of on-site/on-demand single-photon sources in the blue-green spectral range operating in the GHz frequency range at high temperatures.
PACS: 42.50.Ar – Photon statistics and coherence theory / 78.67.Uh – Nanowires / 78.55.Cr – III-V semiconductors
© EPLA, 2015
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