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arXiv · 1710.10635

GaAs droplet quantum dots with nanometer-thin capping layer for plasmonic applications

Suk In Park·Oliver Joe Trojak·Eunhye Lee·Jin Dong Song·Jihoon Kyhm·Ilki Han·Jongsu Kim·Gyu-Chul Yi·Luca Sapienza
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Abstract

We report on the growth and optical characterisation of droplet GaAs quantum dots with extremely-thin (11 nm) capping layers. To achieve such result, an internal thermal heating step is introduced during the growth and its role in the morphological properties of the quantum dots obtained is investigated via scanning electron and atomic force microscopy. Photoluminescence measurements at cryogenic temperatures show optically stable, sharp and bright emission from single quantum dots, at near-infrared wavelengths. Given the quality of their optical properties and the proximity to the surface, such emitters are ideal candidates for the investigation of near field effects, like the coupling to plasmonic modes, in order to strongly control the directionality of the emission and/or the spontaneous emission rate, crucial parameters for quantum photonic applications.

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Suk In Park, Oliver Joe Trojak, Eunhye Lee, Jin Dong Song, Jihoon Kyhm, Ilki Han, Jongsu Kim, Gyu-Chul Yi, Luca Sapienza. 2017-10-29. GaAs droplet quantum dots with nanometer-thin capping layer for plasmonic applications. https://doi.org/10.1088/1361-6528%2Faab2e1

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