Deep sub-wavelength scale focusing of heat flux radiated by magneto-optical nanoemitters in the presence of an external magnetic-field

IF 2.3 3区 物理与天体物理 Q2 OPTICS Journal of Quantitative Spectroscopy & Radiative Transfer Pub Date : 2024-12-24 DOI:10.1016/j.jqsrt.2024.109322
Louis Rihouey, Philippe Ben-Abdallah, Riccardo Messina
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Abstract

We introduce a theoretical framework to describe the heat flux radiated in the near-field regime by a set of magneto-optical thermal nanoemitters close to a substrate in the presence of an external magnetic field. Then, we investigate the particular case of a single emitter and we demonstrate that the external field can induce both an amplification of the heat exchanged between emittter and substrate and a focusing of the Poynting field at the substrate interface at deep sub-wavelength scale. These effects open up promising perspectives for the development of heat-assisted magnetic-recording technology.
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外磁场存在下磁光纳米发射器辐射热流的深亚波长尺度聚焦
我们引入了一个理论框架来描述在存在外部磁场的情况下,一组靠近衬底的磁光热纳米发射器在近场状态下辐射的热流。然后,我们研究了单发射器的特殊情况,我们证明了外场可以诱导发射器和衬底之间的热交换放大和衬底界面在深亚波长尺度上的坡印亭场聚焦。这些效应为热辅助磁记录技术的发展开辟了广阔的前景。
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来源期刊
CiteScore
5.30
自引率
21.70%
发文量
273
审稿时长
58 days
期刊介绍: Papers with the following subject areas are suitable for publication in the Journal of Quantitative Spectroscopy and Radiative Transfer: - Theoretical and experimental aspects of the spectra of atoms, molecules, ions, and plasmas. - Spectral lineshape studies including models and computational algorithms. - Atmospheric spectroscopy. - Theoretical and experimental aspects of light scattering. - Application of light scattering in particle characterization and remote sensing. - Application of light scattering in biological sciences and medicine. - Radiative transfer in absorbing, emitting, and scattering media. - Radiative transfer in stochastic media.
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