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

GaAs droplet quantum dots with nanometer-thin capping layer for plasmonic applications
GaAs droplet quantum dots with nanometer-thin capping layer for plasmonic applications
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 good 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.
0957-4484
In Park, Suk
a57f28f6-e427-4d47-aed9-d824c36080eb
Trojak, Oliver Joe
795f56e4-951b-48ec-95c3-8af4e0d8f3d5
Lee, Eunhye
bec7308a-c813-4a37-8e1e-bd713cd09087
Dong Song, Jin
b6eaca8c-d37d-4fae-8f5b-2264184e080f
Kyhm, Jihoon
5cfe44e6-fed3-4445-8890-a2f3a8a539ee
Han, Ilki
bcb1f619-9195-4472-a535-d7589345b659
Kim, Jongsu
c26d8f2a-99a4-4687-a209-b38f8d12f889
Yi, Gyu-Chul
98024428-862b-491f-85ac-df7dcfe40c04
Sapienza, Luca
a2e0cf6c-1f22-4a5a-87a2-ffab0e24e6ac
In Park, Suk
a57f28f6-e427-4d47-aed9-d824c36080eb
Trojak, Oliver Joe
795f56e4-951b-48ec-95c3-8af4e0d8f3d5
Lee, Eunhye
bec7308a-c813-4a37-8e1e-bd713cd09087
Dong Song, Jin
b6eaca8c-d37d-4fae-8f5b-2264184e080f
Kyhm, Jihoon
5cfe44e6-fed3-4445-8890-a2f3a8a539ee
Han, Ilki
bcb1f619-9195-4472-a535-d7589345b659
Kim, Jongsu
c26d8f2a-99a4-4687-a209-b38f8d12f889
Yi, Gyu-Chul
98024428-862b-491f-85ac-df7dcfe40c04
Sapienza, Luca
a2e0cf6c-1f22-4a5a-87a2-ffab0e24e6ac

In Park, Suk, Trojak, Oliver Joe, Lee, Eunhye, Dong Song, Jin, Kyhm, Jihoon, Han, Ilki, Kim, Jongsu, Yi, Gyu-Chul and Sapienza, Luca (2018) GaAs droplet quantum dots with nanometer-thin capping layer for plasmonic applications. Nanotechnology, 29 (20). (doi:10.1088/1361-6528/aab2e1).

Record type: Article

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 good 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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droplet_QDs_14Feb2018 - Accepted Manuscript
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More information

Submitted date: 2017
Accepted/In Press date: 28 February 2018
e-pub ahead of print date: 23 March 2018
Additional Information: Author Sapienza has confirmed that the manuscript included in this record is the AM. I have adjusted accordingly. Please check embargo details.

Identifiers

Local EPrints ID: 418210
URI: http://eprints.soton.ac.uk/id/eprint/418210
ISSN: 0957-4484
PURE UUID: f58da8a4-61e6-4b92-80fb-c611d77bc0c5
ORCID for Oliver Joe Trojak: ORCID iD orcid.org/0000-0003-2296-6036

Catalogue record

Date deposited: 23 Feb 2018 17:30
Last modified: 17 Dec 2019 05:35

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