Lithography-free polarization-dependent absorber based on α-MoO3

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外文摘要：As a natural biaxial hyperbolic material,α-phase molybdenum trioxide(α-MoO3)exhibits dielectric and metallic properties in the plane,rendering it an exceptional candidate for polarization-dependent devices.In this work,we design a lithography-free polarization-dependent absorber consisting of an α-MoO3 film,a germanium layer,and a silver substrate.The results show that a narrowband absorption of up to 0.99 is achieved at a wavelength of 12.2 pm for transverse magnetic polarization.In contrast,the absorption is only 0.06 at this wavelength for transverse electric polarization.This remarkable polarization-dependent absorption performance is attributed to the coupling of epsilon-near-zero modes and Fabry-Perot resonances,which is confirmed by the electric field and power dissipation density distributions.Furthermore,strong polarization-dependent performance could also be achieved when the crystal axis of α-MoO3 is rotated in the out-of-plane.This work demonstrates that in-plane anisotropic α-MoO3 has the potential for designing high polarization-dependent devices.

外文关键词：

α-MoO3polarization-dependentepsilon-near-zero modesFabry-Perot resonances

作者：

HU Yang、WU XiaoHu、LI HongJu、ZHAO Yi、LIU HaoTuo、HUANG XiuQuan

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作者单位：

School of Power and Energy,Northwestern Polytechnical University,Xi'an 710072,China

Shandong Institute of Advanced Technology,Jinan 250100,China

School of Physics,Hefei University of Technology,Hefei 230009,China

Department of Academic Affairs,Harbin Institute of Technology(Shenzhen),Shenzhen 518055,China

Key Laboratory of Advanced Manufacturing and Intelligent Technology,Ministry of Education,Harbin University of Science and Technology,Harbin 150080,China

School of Power and Energy Northwestern Polytechnical University,Xi'an 710072,China

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基金：

National Natural Science Foundation of ChinaShandong Provincial Natural Science FoundationTaishan Scholars Program,and Basic and Applied Basic Research Fund Project of Guangdong Province

项目编号：

52106099ZR2022YQ572019A1515111178

出版年：

2024

DOI：

10.1007/s11431-023-2627-1

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

年,卷(期)：2024.(7)