Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy

Abstract Lengenbachite is a naturally occurring layered mineral formed with alternating stacks of two constituent PbS-like and M2S3-like two-dimensional (2D) material layers due to the phase segregation process during the formation. Here, we demonstrate to achieve van der Waals (vdW) heterostructure...

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Autores principales:	Arindam Dasgupta, Xiaodong Yang, Jie Gao
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/94261bd91f00458b9e3cd5bcc926814d
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spelling	oai:doaj.org-article:94261bd91f00458b9e3cd5bcc926814d2021-12-05T12:25:27ZNaturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy10.1038/s41699-021-00271-82397-7132https://doaj.org/article/94261bd91f00458b9e3cd5bcc926814d2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00271-8https://doaj.org/toc/2397-7132Abstract Lengenbachite is a naturally occurring layered mineral formed with alternating stacks of two constituent PbS-like and M2S3-like two-dimensional (2D) material layers due to the phase segregation process during the formation. Here, we demonstrate to achieve van der Waals (vdW) heterostructures of lengenbachite down to a few layer-pair thickness by mechanical exfoliation of bulk lengenbachite mineral. The incommensurability between the constituent isotropic 2D material layers makes the formed vdW heterostructure exhibit strong in-plane structural anisotropy, which leads to highly anisotropic optical responses in lengenbachite thin flakes, including anisotropic Raman scattering, linear dichroism, and anisotropic third-harmonic generation. Moreover, we exploit the nonlinear optical anisotropy for polarization-dependent intensity modulation of the converted third-harmonic optical vortices. Our study establishes lengenbachite as a new natural vdW heterostructure-based 2D material with unique optical properties for realizing anisotropic optical devices for photonic integrated circuits and optical information processing.Arindam DasguptaXiaodong YangJie GaoNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-13 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Chemistry QD1-999 Arindam Dasgupta Xiaodong Yang Jie Gao Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
description	Abstract Lengenbachite is a naturally occurring layered mineral formed with alternating stacks of two constituent PbS-like and M2S3-like two-dimensional (2D) material layers due to the phase segregation process during the formation. Here, we demonstrate to achieve van der Waals (vdW) heterostructures of lengenbachite down to a few layer-pair thickness by mechanical exfoliation of bulk lengenbachite mineral. The incommensurability between the constituent isotropic 2D material layers makes the formed vdW heterostructure exhibit strong in-plane structural anisotropy, which leads to highly anisotropic optical responses in lengenbachite thin flakes, including anisotropic Raman scattering, linear dichroism, and anisotropic third-harmonic generation. Moreover, we exploit the nonlinear optical anisotropy for polarization-dependent intensity modulation of the converted third-harmonic optical vortices. Our study establishes lengenbachite as a new natural vdW heterostructure-based 2D material with unique optical properties for realizing anisotropic optical devices for photonic integrated circuits and optical information processing.
format	article
author	Arindam Dasgupta Xiaodong Yang Jie Gao
author_facet	Arindam Dasgupta Xiaodong Yang Jie Gao
author_sort	Arindam Dasgupta
title	Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
title_short	Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
title_full	Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
title_fullStr	Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
title_full_unstemmed	Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
title_sort	naturally occurring van der waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/94261bd91f00458b9e3cd5bcc926814d
work_keys_str_mv	AT arindamdasgupta naturallyoccurringvanderwaalsheterostructurelengenbachitewithstronginplanestructuralandopticalanisotropy AT xiaodongyang naturallyoccurringvanderwaalsheterostructurelengenbachitewithstronginplanestructuralandopticalanisotropy AT jiegao naturallyoccurringvanderwaalsheterostructurelengenbachitewithstronginplanestructuralandopticalanisotropy
_version_	1718371972058972160

Naturally occurring van der Waals heterostructure lengenbachite with strong in-plane structural and optical anisotropy

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