Conventional approaches to control and shape the scattering pattems of light generated by different nanostructures are mostly based on engineering of their electric response due to the fact that most metallic nanostru...Conventional approaches to control and shape the scattering pattems of light generated by different nanostructures are mostly based on engineering of their electric response due to the fact that most metallic nanostructures support only electric resonances in the optical frequency range. Recently, fuelled by the fast development in the fields of metamaterials and plasmonics, artificial optically-induced magnetic responses have been demonstrated for various nanostructures. This kind of response can be employed to provide an extra degree of freedom for the efficient control and shaping of the scattering patterns of nanoparticles and nanoantennas. Here we review the recent progress in this research direction of nanoparticle scattering shaping and control through the interference of both electric and optically-induced magnetic responses. We discuss the magnetic resonances supported by various structures in different spectral regimes, and then summarize the original results on the scattering shaping involving both electric and magnetic responses, based on the interference of both spectrally separated （with different resonant wavelengths） and overlapped dipoles （with the same resonant wavelength）, and also other higher-order modes. Finally, we discuss the scattering control utilizing Fano resonances associated with the magnetic responses.展开更多
Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure tr...Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure transformation of monolayer ReS2 induced by strain is greatly lacking. In this work, the Raman spectra of monolayer ReS2 with external strain are determined theoretically based on the density function theory. Due to the lower structural symmetry, deformation induced by external strain can only regulate the Raman mode intensity but cannot lead to Raman mode shifts. Our calculations suggest that structural deformation induced by external strain can be identified by Raman scattering.展开更多
In complex environments,infrared camouflage within the long-wave infrared range is essential for modern defense and surveillance applications,requiring precise control over both radiative and scattering properties of ...In complex environments,infrared camouflage within the long-wave infrared range is essential for modern defense and surveillance applications,requiring precise control over both radiative and scattering properties of military targets.For practical implementation,developing surfaces that integrate dynamic emissivity control,low specular reflectance,and scalable fabrication processes remains a significant challenge.Here,a novel infrared camouflage device is proposed to simultaneously achieve low specular reflectance(<0.1)and dynamic infrared camouflage.The device seamlessly blends into backgrounds with temperatures ranging from 35°C to 45°C by tuning the emissivity of the device,which is attained by controlling the Ge2Sb2Te5 phase change.In addition,it reflects almost no surrounding thermal signals compared with the conventional low-emissivity smooth surface.The thermal camouflage remains effective and stable across observation angles ranging from 20°to 60°.This work proposes a novel approach to simultaneously reducing specular reflection and dynamic emissivity control,potentially inspiring future research and applications in multispectral camouflage and stealth technology.展开更多
基金Project supported by the Australian Research Council Center of Excellence for Ultrahigh Bandwidth Devices for Optical Systems(Grant No.CE110001018)the Future Fellowship(Grant No.FT110100037)
文摘Conventional approaches to control and shape the scattering pattems of light generated by different nanostructures are mostly based on engineering of their electric response due to the fact that most metallic nanostructures support only electric resonances in the optical frequency range. Recently, fuelled by the fast development in the fields of metamaterials and plasmonics, artificial optically-induced magnetic responses have been demonstrated for various nanostructures. This kind of response can be employed to provide an extra degree of freedom for the efficient control and shaping of the scattering patterns of nanoparticles and nanoantennas. Here we review the recent progress in this research direction of nanoparticle scattering shaping and control through the interference of both electric and optically-induced magnetic responses. We discuss the magnetic resonances supported by various structures in different spectral regimes, and then summarize the original results on the scattering shaping involving both electric and magnetic responses, based on the interference of both spectrally separated （with different resonant wavelengths） and overlapped dipoles （with the same resonant wavelength）, and also other higher-order modes. Finally, we discuss the scattering control utilizing Fano resonances associated with the magnetic responses.
基金Supported by the National Natural Science Foundation of China under Grant Nos 61264008,61574080 and 61505085
文摘Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure transformation of monolayer ReS2 induced by strain is greatly lacking. In this work, the Raman spectra of monolayer ReS2 with external strain are determined theoretically based on the density function theory. Due to the lower structural symmetry, deformation induced by external strain can only regulate the Raman mode intensity but cannot lead to Raman mode shifts. Our calculations suggest that structural deformation induced by external strain can be identified by Raman scattering.
基金National Natural Science Foundation of China(U23A20377)Postgraduate Education Reform and Quality Improvement Project of Henan Province(YJS2024JD32)POSCO(POSCO-POSTECH-RIST Convergence Research Center)National Research Foundation of Korea(RS-2022-NR067559)。
文摘In complex environments,infrared camouflage within the long-wave infrared range is essential for modern defense and surveillance applications,requiring precise control over both radiative and scattering properties of military targets.For practical implementation,developing surfaces that integrate dynamic emissivity control,low specular reflectance,and scalable fabrication processes remains a significant challenge.Here,a novel infrared camouflage device is proposed to simultaneously achieve low specular reflectance(<0.1)and dynamic infrared camouflage.The device seamlessly blends into backgrounds with temperatures ranging from 35°C to 45°C by tuning the emissivity of the device,which is attained by controlling the Ge2Sb2Te5 phase change.In addition,it reflects almost no surrounding thermal signals compared with the conventional low-emissivity smooth surface.The thermal camouflage remains effective and stable across observation angles ranging from 20°to 60°.This work proposes a novel approach to simultaneously reducing specular reflection and dynamic emissivity control,potentially inspiring future research and applications in multispectral camouflage and stealth technology.
