Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array

Abstract Layered transition metal dichalcogenides (TMDCs) have shown great potential for a wide range of applications in photonics and optoelectronics. Nevertheless, valley decoherence severely randomizes its polarization which is important to a light emitter. Plasmonic metasurface with a unique way...

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Autores principales:	Chunrui Han, Yu Wang, Weihu Zhou, Minpeng Liang, Jianting Ye
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/54e29e86a4e040d0b0558086b2d56655
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spelling	oai:doaj.org-article:54e29e86a4e040d0b0558086b2d566552021-12-02T16:50:31ZStrong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array10.1038/s41598-021-89136-02045-2322https://doaj.org/article/54e29e86a4e040d0b0558086b2d566552021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-89136-0https://doaj.org/toc/2045-2322Abstract Layered transition metal dichalcogenides (TMDCs) have shown great potential for a wide range of applications in photonics and optoelectronics. Nevertheless, valley decoherence severely randomizes its polarization which is important to a light emitter. Plasmonic metasurface with a unique way to manipulate the light-matter interaction may provide an effective and practical solution. Here by integrating TMDCs with plasmonic nanowire arrays, we demonstrate strong anisotropic enhancement of the excitonic emission at different spectral positions. For the indirect bandgap transition in bilayer WS2, multifold enhancement can be achieved with the photoluminescence (PL) polarization either perpendicular or parallel to the long axis of nanowires, which arises from the coupling of WS2 with localized or guided plasmon modes, respectively. Moreover, PL of high linearity is obtained in the direct bandgap transition benefiting from, in addition to the plasmonic enhancement, the directional diffraction scattering of nanowire arrays. Our method with enhanced PL intensity contrasts to the conventional form-birefringence based on the aspect ratio of nanowire arrays where the intensity loss is remarkable. Our results provide a prototypical plasmon-exciton hybrid system for anisotropic enhancement of the PL at the nanoscale, enabling simultaneous control of the intensity, polarization and wavelength toward practical ultrathin photonic devices based on TMDCs.Chunrui HanYu WangWeihu ZhouMinpeng LiangJianting YeNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Chunrui Han Yu Wang Weihu Zhou Minpeng Liang Jianting Ye Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
description	Abstract Layered transition metal dichalcogenides (TMDCs) have shown great potential for a wide range of applications in photonics and optoelectronics. Nevertheless, valley decoherence severely randomizes its polarization which is important to a light emitter. Plasmonic metasurface with a unique way to manipulate the light-matter interaction may provide an effective and practical solution. Here by integrating TMDCs with plasmonic nanowire arrays, we demonstrate strong anisotropic enhancement of the excitonic emission at different spectral positions. For the indirect bandgap transition in bilayer WS2, multifold enhancement can be achieved with the photoluminescence (PL) polarization either perpendicular or parallel to the long axis of nanowires, which arises from the coupling of WS2 with localized or guided plasmon modes, respectively. Moreover, PL of high linearity is obtained in the direct bandgap transition benefiting from, in addition to the plasmonic enhancement, the directional diffraction scattering of nanowire arrays. Our method with enhanced PL intensity contrasts to the conventional form-birefringence based on the aspect ratio of nanowire arrays where the intensity loss is remarkable. Our results provide a prototypical plasmon-exciton hybrid system for anisotropic enhancement of the PL at the nanoscale, enabling simultaneous control of the intensity, polarization and wavelength toward practical ultrathin photonic devices based on TMDCs.
format	article
author	Chunrui Han Yu Wang Weihu Zhou Minpeng Liang Jianting Ye
author_facet	Chunrui Han Yu Wang Weihu Zhou Minpeng Liang Jianting Ye
author_sort	Chunrui Han
title	Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
title_short	Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
title_full	Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
title_fullStr	Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
title_full_unstemmed	Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array
title_sort	strong anisotropic enhancement of photoluminescence in ws2 integrated with plasmonic nanowire array
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/54e29e86a4e040d0b0558086b2d56655
work_keys_str_mv	AT chunruihan stronganisotropicenhancementofphotoluminescenceinws2integratedwithplasmonicnanowirearray AT yuwang stronganisotropicenhancementofphotoluminescenceinws2integratedwithplasmonicnanowirearray AT weihuzhou stronganisotropicenhancementofphotoluminescenceinws2integratedwithplasmonicnanowirearray AT minpengliang stronganisotropicenhancementofphotoluminescenceinws2integratedwithplasmonicnanowirearray AT jiantingye stronganisotropicenhancementofphotoluminescenceinws2integratedwithplasmonicnanowirearray
_version_	1718383037287235584

Strong anisotropic enhancement of photoluminescence in WS2 integrated with plasmonic nanowire array

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