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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2408.01160 |
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| _version_ | 1866909277903388672 |
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| author | Sharma, Raghav Ngo, Tung Raimondo, Eleonora Giordano, Anna Igarashi, Junta Jinnai, Butsurin Zhao, Shishun Lei, Jiayu Guo, Yong-Xin Finocchio, Giovanni Fukami, Shunsuke Ohno, Hideo Yang, Hyunsoo |
| author_facet | Sharma, Raghav Ngo, Tung Raimondo, Eleonora Giordano, Anna Igarashi, Junta Jinnai, Butsurin Zhao, Shishun Lei, Jiayu Guo, Yong-Xin Finocchio, Giovanni Fukami, Shunsuke Ohno, Hideo Yang, Hyunsoo |
| contents | Radiofrequency harvesting using ambient wireless energy could be used to reduce the carbon footprint of electronic devices. However, ambient radiofrequency energy is weak (less than -20 dBm), and thermodynamic limits and high-frequency parasitic impedance restrict the performance of state-of-the-art radiofrequency rectifiers. Nanoscale spin rectifiers based on magnetic tunnel junctions have recently demonstrated high sensitivity, but suffer from a low a.c.-to-d.c. conversion efficiency (less than 1%). Here, we report a sensitive spin rectifier rectenna that can harvest ambient radiofrequency signals between -62 and -20 dBm. We also develop an on-chip co-planar waveguide-based spin rectifier array with a large zero-bias sensitivity (around 34,500 mV/mW) and high efficiency (7.81%). Self-parametric excitation driven by voltage-controlled magnetic anisotropy is a key mechanism that contributes to the performance of the spin-rectifier array. We show that these spin rectifiers can wirelessly power a sensor at a radiofrequency power of -27 dBm. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_01160 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nanoscale spin rectifiers for harvesting ambient radiofrequency energy Sharma, Raghav Ngo, Tung Raimondo, Eleonora Giordano, Anna Igarashi, Junta Jinnai, Butsurin Zhao, Shishun Lei, Jiayu Guo, Yong-Xin Finocchio, Giovanni Fukami, Shunsuke Ohno, Hideo Yang, Hyunsoo Materials Science Radiofrequency harvesting using ambient wireless energy could be used to reduce the carbon footprint of electronic devices. However, ambient radiofrequency energy is weak (less than -20 dBm), and thermodynamic limits and high-frequency parasitic impedance restrict the performance of state-of-the-art radiofrequency rectifiers. Nanoscale spin rectifiers based on magnetic tunnel junctions have recently demonstrated high sensitivity, but suffer from a low a.c.-to-d.c. conversion efficiency (less than 1%). Here, we report a sensitive spin rectifier rectenna that can harvest ambient radiofrequency signals between -62 and -20 dBm. We also develop an on-chip co-planar waveguide-based spin rectifier array with a large zero-bias sensitivity (around 34,500 mV/mW) and high efficiency (7.81%). Self-parametric excitation driven by voltage-controlled magnetic anisotropy is a key mechanism that contributes to the performance of the spin-rectifier array. We show that these spin rectifiers can wirelessly power a sensor at a radiofrequency power of -27 dBm. |
| title | Nanoscale spin rectifiers for harvesting ambient radiofrequency energy |
| topic | Materials Science |
| url | https://arxiv.org/abs/2408.01160 |