Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses

Abstract The mechanical exfoliation of naturally occurring layered materials has emerged as an easy and effective method for achieving ultrathin van der Waals (vdW) heterostructures with well-defined lattice orientations of the constituent two-dimensional (2D) material layers. Cylindrite is one such...

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Autores principales:	Arindam Dasgupta, Jie Gao, Xiaodong Yang
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/90ca116b7f6a43528b3319431b585622
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spelling	oai:doaj.org-article:90ca116b7f6a43528b3319431b5856222021-12-02T15:10:48ZNatural van der Waals heterostructure cylindrite with highly anisotropic optical responses10.1038/s41699-021-00254-92397-7132https://doaj.org/article/90ca116b7f6a43528b3319431b5856222021-08-01T00:00:00Zhttps://doi.org/10.1038/s41699-021-00254-9https://doaj.org/toc/2397-7132Abstract The mechanical exfoliation of naturally occurring layered materials has emerged as an easy and effective method for achieving ultrathin van der Waals (vdW) heterostructures with well-defined lattice orientations of the constituent two-dimensional (2D) material layers. Cylindrite is one such naturally occurring vdW heterostructure, where the superlattice is composed of alternating stacks of SnS2-like and PbS-like layers. Although the constituent 2D lattices are isotropic, inhomogeneous strain occurring from local atomic alignment for forcing the commensuration makes the cylindrite superlattice structurally anisotropic. Here, we demonstrate the highly anisotropic optical responses of cylindrite thin flakes induced by the anisotropic crystal structure, including angle-resolved polarized Raman scattering, linear dichroism, and polarization-dependent anisotropic third-harmonic generation. Our results provide a promising approach for identifying various natural vdW heterostructure-based 2D materials with tailored optical properties and can be harnessed for realizing anisotropic optical devices for on-chip photonic circuits and optical information processing.Arindam DasguptaJie GaoXiaodong YangNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492ChemistryQD1-999ENnpj 2D Materials and Applications, Vol 5, Iss 1, Pp 1-11 (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 Jie Gao Xiaodong Yang Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
description	Abstract The mechanical exfoliation of naturally occurring layered materials has emerged as an easy and effective method for achieving ultrathin van der Waals (vdW) heterostructures with well-defined lattice orientations of the constituent two-dimensional (2D) material layers. Cylindrite is one such naturally occurring vdW heterostructure, where the superlattice is composed of alternating stacks of SnS2-like and PbS-like layers. Although the constituent 2D lattices are isotropic, inhomogeneous strain occurring from local atomic alignment for forcing the commensuration makes the cylindrite superlattice structurally anisotropic. Here, we demonstrate the highly anisotropic optical responses of cylindrite thin flakes induced by the anisotropic crystal structure, including angle-resolved polarized Raman scattering, linear dichroism, and polarization-dependent anisotropic third-harmonic generation. Our results provide a promising approach for identifying various natural vdW heterostructure-based 2D materials with tailored optical properties and can be harnessed for realizing anisotropic optical devices for on-chip photonic circuits and optical information processing.
format	article
author	Arindam Dasgupta Jie Gao Xiaodong Yang
author_facet	Arindam Dasgupta Jie Gao Xiaodong Yang
author_sort	Arindam Dasgupta
title	Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
title_short	Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
title_full	Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
title_fullStr	Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
title_full_unstemmed	Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses
title_sort	natural van der waals heterostructure cylindrite with highly anisotropic optical responses
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/90ca116b7f6a43528b3319431b585622
work_keys_str_mv	AT arindamdasgupta naturalvanderwaalsheterostructurecylindritewithhighlyanisotropicopticalresponses AT jiegao naturalvanderwaalsheterostructurecylindritewithhighlyanisotropicopticalresponses AT xiaodongyang naturalvanderwaalsheterostructurecylindritewithhighlyanisotropicopticalresponses
_version_	1718387705260277760

Natural van der Waals heterostructure cylindrite with highly anisotropic optical responses

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