Designing a rectifier for harvesting low ambient radiofrequency energy and converting it into useful d.c. power is challenging. Now, a spin-rectifier-based rectenna and a spin-rectifier array with on-chip coplanar waveguides are designed for harvesting ambient radiofrequency signals with good sensitivity and efficiency.
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References
Zhang, X. et al. Two-dimensional MoS2-enabled flexible rectenna for Wi-Fi-band wireless energy harvesting. Nature 566, 368–372 (2019). This paper reports an atomically thin and flexible rectenna based on two-dimensional MoS2.
Tulapurkar, A. et al. Spin-torque diode effect in magnetic tunnel junctions. Nature 438, 339–342 (2005). This paper reports the spin-diode effect.
Miwa, S. et al. Highly sensitive nanoscale spin-torque diode. Nat. Mater. 13, 50–56 (2014). This paper reports SRs with a high sensitivity, surpassing that of Schottky diodes, achieved using a d.c. bias and magnetic field.
Fang, B. et al. Giant spin-torque diode sensitivity in the absence of bias magnetic field. Nat. Commun. 7, 11259 (2016). This paper reports a SR with a high sensitivity achieved without a magnetic field by using a d.c. bias and tilted magnetic anisotropy in the free layer.
Sharma, R. et al. Electrically connected spin-torque oscillators array for 2.4 GHz WiFi band transmission and energy harvesting. Nat. Commun. 12, 2924 (2021). This paper reports a SR-based energy harvester that operates at a Prf of 0 dBm without a magnetic field or a d.c. bias.
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This is a summary of: Sharma, R. et al. Nanoscale spin rectifiers for harvesting ambient radiofrequency energy. Nat. Electron. https://doi.org/10.1038/s41928-024-01212-1 (2024).
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Sensitive spin-rectifier-based rectenna and on-chip array for wireless energy harvesting. Nat Electron 7, 636–637 (2024). https://doi.org/10.1038/s41928-024-01218-9
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DOI: https://doi.org/10.1038/s41928-024-01218-9
