| Autor: |
Chen, Xiang-Dong, Wang, En-Hui, Shan, Long-Kun, Feng, Ce, Zheng, Yu, Dong, Yang, Guo, Guang-Can, Sun, Fang-Wen |
| Předmět: |
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| Zdroj: |
Nature Communications; 11/4/2021, Vol. 12 Issue 1, p1-7, 7p |
| Abstrakt: |
Focusing electromagnetic field to enhance the interaction with matter has been promoting researches and applications of nano electronics and photonics. Usually, the evanescent-wave coupling is adopted in various nano structures and materials to confine the electromagnetic field into a subwavelength space. Here, based on the direct coupling with confined electron oscillations in a nanowire, we demonstrate a tight localization of microwave field down to 10−6λ. A hybrid nanowire-bowtie antenna is further designed to focus the free-space microwave to this deep-subwavelength space. Detected by the nitrogen vacancy center in diamond, the field intensity and microwave-spin interaction strength are enhanced by 2.0 × 108 and 1.4 × 104 times, respectively. Such a high concentration of microwave field will further promote integrated quantum information processing, sensing and microwave photonics in a nanoscale system. Subwavelength focusing of electromagnetic fields often uses evanescent waves and nanostructures to aid confinement. Here, the authors localize a microwave field to 6 orders of magnitude smaller than the wavelength, by coupling to confined electron oscillations in a hybrid nanowire-bowtie antenna. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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