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Direct-Laser-Written Polymer Nanowire Waveguides for Broadband Single Photon Collection from Epitaxial Quantum Dots into a Gaussian-like Mode

Published version
Peer-reviewed

Type

Article

Change log

Authors

Perez, EF 
Haws, C 
Davanco, M 
Song, J 
Sapienza, L 

Abstract

jats:titleAbstract</jats:title>jats:pSingle epitaxial quantum dots (QDs) embedded in nanophotonic geometries are a leading technology for quantum light generation. However, efficiently coupling their emission into a single mode fiber or Gaussian beam often remains challenging. Here, direct laser writing (DLW) is used to address this challenge by fabricating 1 µm diameter polymer nanowires (PNWs) in‐contact‐with and perpendicular‐to a QD‐containing GaAs layer. QD emission is coupled to the PNW's waveguide mode, enhancing collection efficiency into a single‐mode fiber. PNW fabrication does not alter the QD device layer, making PNWs well‐suited for augmenting pre‐existing in‐plane geometries. Standalone PNWs and PNWs in conjunction with metallic nanoring devices that have been previously established for increasing extraction of QD emission are studied. Methods that mitigate standing wave reflections and heat, caused by GaAs's absorption/reflection of the lithography beam, and which otherwise prevent PNW fabrication, are also reported. A maximum improvement of ( in a nanoring system with a PNW compared to the same system without a PNW is observed, in line with numerical results, and highlighting the PNW's ability to waveguide QD emission and increase collection efficiency simultaneously. These results demonstrate new DLW functionality in service of quantum emitter photonics that maintains compatibility with existing top‐down fabrication approaches.</jats:p>

Description

Keywords

51 Physical Sciences, 5108 Quantum Physics, 40 Engineering, 4018 Nanotechnology

Journal Title

Advanced Quantum Technologies

Conference Name

Journal ISSN

2511-9044
2511-9044

Volume Title

Publisher

Wiley