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Optically Inspired Nanomagnonics with Nonreciprocal Spin Waves in Synthetic Antiferromagnets.
Advanced Materials ( IF 27.4 ) Pub Date : 2020-01-16 , DOI: 10.1002/adma.201906439 Edoardo Albisetti 1, 2 , Silvia Tacchi 3 , Raffaele Silvani 3, 4 , Giuseppe Scaramuzzi 1 , Simone Finizio 5 , Sebastian Wintz 5 , Christian Rinaldi 1 , Matteo Cantoni 1 , Jörg Raabe 5 , Giovanni Carlotti 3 , Riccardo Bertacco 1 , Elisa Riedo 2, 6 , Daniela Petti 1
Advanced Materials ( IF 27.4 ) Pub Date : 2020-01-16 , DOI: 10.1002/adma.201906439 Edoardo Albisetti 1, 2 , Silvia Tacchi 3 , Raffaele Silvani 3, 4 , Giuseppe Scaramuzzi 1 , Simone Finizio 5 , Sebastian Wintz 5 , Christian Rinaldi 1 , Matteo Cantoni 1 , Jörg Raabe 5 , Giovanni Carlotti 3 , Riccardo Bertacco 1 , Elisa Riedo 2, 6 , Daniela Petti 1
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Integrated optically inspired wave-based processing is envisioned to outperform digital architectures in specific tasks, such as image processing and speech recognition. In this view, spin waves represent a promising route due to their nanoscale wavelength in the gigahertz frequency range and rich phenomenology. Here, a versatile, optically inspired platform using spin waves is realized, demonstrating the wavefront engineering, focusing, and robust interference of spin waves with nanoscale wavelength. In particular, magnonic nanoantennas based on tailored spin textures are used for launching spatially shaped coherent wavefronts, diffraction-limited spin-wave beams, and generating robust multi-beam interference patterns, which spatially extend for several times the spin-wave wavelength. Furthermore, it is shown that intriguing features, such as resilience to back reflection, naturally arise from the spin-wave nonreciprocity in synthetic antiferromagnets, preserving the high quality of the interference patterns from spurious counterpropagating modes. This work represents a fundamental step toward the realization of nanoscale optically inspired devices based on spin waves.
中文翻译：
在合成反铁磁体中具有不可逆自旋波的光学启发纳米磁振子。
可以预见，集成的基于光的基于波的处理将在特定任务（例如图像处理和语音识别）方面优于数字体系结构。在这种观点下，自旋波由于其在千兆赫兹频率范围内的纳米级波长和丰富的现象学而代表了一种有前途的途径。在这里，实现了使用自旋波的多功能，受光学启发的平台，展示了纳米级波长的自旋波的波前工程，聚焦和强大的干扰能力。尤其是，基于量身定制的自旋纹理的马格尼克式纳米天线用于发射空间形状的相干波阵面，衍射受限的自旋波束，并生成健壮的多波束干涉图，该图在空间上扩展了自旋波波长的几倍。此外，还显示出有趣的功能，合成反铁磁体中的自旋波不可逆性会自然产生诸如回弹性等，从而保留了来自虚假反向传播模式的高质量干涉图样。这项工作代表了实现基于自旋波的纳米级光学启发设备的基础性步骤。
更新日期：2020-03-03
中文翻译：
在合成反铁磁体中具有不可逆自旋波的光学启发纳米磁振子。
可以预见，集成的基于光的基于波的处理将在特定任务（例如图像处理和语音识别）方面优于数字体系结构。在这种观点下，自旋波由于其在千兆赫兹频率范围内的纳米级波长和丰富的现象学而代表了一种有前途的途径。在这里，实现了使用自旋波的多功能，受光学启发的平台，展示了纳米级波长的自旋波的波前工程，聚焦和强大的干扰能力。尤其是，基于量身定制的自旋纹理的马格尼克式纳米天线用于发射空间形状的相干波阵面，衍射受限的自旋波束，并生成健壮的多波束干涉图，该图在空间上扩展了自旋波波长的几倍。此外，还显示出有趣的功能，合成反铁磁体中的自旋波不可逆性会自然产生诸如回弹性等，从而保留了来自虚假反向传播模式的高质量干涉图样。这项工作代表了实现基于自旋波的纳米级光学启发设备的基础性步骤。
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