Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide

Lithium niobate thin film represents as an ideal material substrate for quantum photonics due to its strong electro-optic effect and high-speed modulation capability. Here, we propose a novel platform which heterogeneously integrates single self-assembled InAs/GaAs quantum dots for a single-photon s...

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Autores principales:	Xing Wei, Samuel Kesse
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Lithium Niobate Heterogeneously integrated photonic chip InAs/GaAs quantum dots grating coupler directional coupler Crystallography QD901-999
Acceso en línea:	https://doaj.org/article/135a5e375e3949548984bbe54987895e
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spelling	oai:doaj.org-article:135a5e375e3949548984bbe54987895e2021-11-25T17:19:06ZHeterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide10.3390/cryst111113762073-4352https://doaj.org/article/135a5e375e3949548984bbe54987895e2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4352/11/11/1376https://doaj.org/toc/2073-4352Lithium niobate thin film represents as an ideal material substrate for quantum photonics due to its strong electro-optic effect and high-speed modulation capability. Here, we propose a novel platform which heterogeneously integrates single self-assembled InAs/GaAs quantum dots for a single-photon source on a lithium niobate photonic chip. The InAs/GaAs quantum dots can be transferred to the lithium niobate waveguide via a substrate transfer procedure with nanometer precision and be integrated through van der Waals force. A down-tapered structure is designed and optimized to deliver the photon flux generated from the InAs quantum dots embedded in a GaAs waveguide to the lithium niobate waveguide with an overall efficiency of 42%. In addition, the electro-optical effect is used to tune, and therefore to tune the beam splitting ratio of the integrated lithium niobate directional coupler, which can simultaneously route multiple photons to different spatial modes, and subsequently fan out through grating couplers to achieve single-photon sub-multiplexing. The proposed device opens up novel opportunities for achieving multifunctional hybrid integrated photonic chips.Xing WeiSamuel KesseMDPI AGarticleLithium NiobateHeterogeneously integrated photonic chipInAs/GaAs quantum dotsgrating couplerdirectional couplerCrystallographyQD901-999ENCrystals, Vol 11, Iss 1376, p 1376 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Lithium Niobate Heterogeneously integrated photonic chip InAs/GaAs quantum dots grating coupler directional coupler Crystallography QD901-999
spellingShingle	Lithium Niobate Heterogeneously integrated photonic chip InAs/GaAs quantum dots grating coupler directional coupler Crystallography QD901-999 Xing Wei Samuel Kesse Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
description	Lithium niobate thin film represents as an ideal material substrate for quantum photonics due to its strong electro-optic effect and high-speed modulation capability. Here, we propose a novel platform which heterogeneously integrates single self-assembled InAs/GaAs quantum dots for a single-photon source on a lithium niobate photonic chip. The InAs/GaAs quantum dots can be transferred to the lithium niobate waveguide via a substrate transfer procedure with nanometer precision and be integrated through van der Waals force. A down-tapered structure is designed and optimized to deliver the photon flux generated from the InAs quantum dots embedded in a GaAs waveguide to the lithium niobate waveguide with an overall efficiency of 42%. In addition, the electro-optical effect is used to tune, and therefore to tune the beam splitting ratio of the integrated lithium niobate directional coupler, which can simultaneously route multiple photons to different spatial modes, and subsequently fan out through grating couplers to achieve single-photon sub-multiplexing. The proposed device opens up novel opportunities for achieving multifunctional hybrid integrated photonic chips.
format	article
author	Xing Wei Samuel Kesse
author_facet	Xing Wei Samuel Kesse
author_sort	Xing Wei
title	Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
title_short	Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
title_full	Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
title_fullStr	Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
title_full_unstemmed	Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide
title_sort	heterogeneously integrated photonic chip on lithium niobate thin-film waveguide
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/135a5e375e3949548984bbe54987895e
work_keys_str_mv	AT xingwei heterogeneouslyintegratedphotonicchiponlithiumniobatethinfilmwaveguide AT samuelkesse heterogeneouslyintegratedphotonicchiponlithiumniobatethinfilmwaveguide
_version_	1718412512988233728

Heterogeneously Integrated Photonic Chip on Lithium Niobate Thin-Film Waveguide

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