Ultra-compact dual-band smart NEMS magnetoelectric antennas for simultaneous wireless energy harvesting and magnetic field sensing

Mohsen Zaeimbashi, Mehdi Nasrollahpour, Adam Khalifa, Anthony Romano, Xianfeng Liang, Huaihao Chen, Neville Sun, Alexei Matyushov, Hwaider Lin, Cunzheng Dong, Ziyue Xu, Ankit Mittal, Isabel Martos-Repath, Gaurav Jha, Nikita Mirchandani, Diptashree Das, Marvin Onabajo, Aatmesh Shrivastava, Sydney Cash and Nian X. Sun ()
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Mohsen Zaeimbashi: Northeastern University
Mehdi Nasrollahpour: Northeastern University
Adam Khalifa: Massachusetts General Hospital, Harvard Medical School
Anthony Romano: Northeastern University
Xianfeng Liang: Northeastern University
Huaihao Chen: Northeastern University
Neville Sun: Northeastern University
Alexei Matyushov: Northeastern University
Hwaider Lin: Northeastern University
Cunzheng Dong: Northeastern University
Ziyue Xu: Northeastern University
Ankit Mittal: Northeastern University
Isabel Martos-Repath: Northeastern University
Gaurav Jha: Northeastern University
Nikita Mirchandani: Northeastern University
Diptashree Das: Northeastern University
Marvin Onabajo: Northeastern University
Aatmesh Shrivastava: Northeastern University
Sydney Cash: Massachusetts General Hospital, Harvard Medical School
Nian X. Sun: Northeastern University

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract Ultra-compact wireless implantable medical devices are in great demand for healthcare applications, in particular for neural recording and stimulation. Current implantable technologies based on miniaturized micro-coils suffer from low wireless power transfer efficiency (PTE) and are not always compliant with the specific absorption rate imposed by the Federal Communications Commission. Moreover, current implantable devices are reliant on differential recording of voltage or current across space and require direct contact between electrode and tissue. Here, we show an ultra-compact dual-band smart nanoelectromechanical systems magnetoelectric (ME) antenna with a size of 250 × 174 µm2 that can efficiently perform wireless energy harvesting and sense ultra-small magnetic fields. The proposed ME antenna has a wireless PTE 1–2 orders of magnitude higher than any other reported miniaturized micro-coil, allowing the wireless IMDs to be compliant with the SAR limit. Furthermore, the antenna’s magnetic field detectivity of 300–500 pT allows the IMDs to record neural magnetic fields.

Date: 2021
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DOI: 10.1038/s41467-021-23256-z

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