| Autor: |
Zhou, C., Liu, Y. P., Wang, Z., Ma, S. J., Jia, M. W., Wu, R. Q., Zhou, L., Zhang, W., Liu, M. K., Wu, Y. Z., Qi, J. |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 121, 086801 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.121.086801 |
| Popis: |
Novel mechanisms for electromagnetic wave emission in the terahertz (THz) frequency regime emerging at the nanometer scale have recently attracted intense attention for the purpose of searching next-generation broadband THz emitters. Here, we report a new mechanism for broadband THz emission, utilizing the interface inverse Rashba-Edelstein effect. By engineering the symmetry of the Ag/Bi Rashba interface, we demonstrate a controllable THz radiation (~0.1-5 THz) waveform emitted from metallic Fe/Ag/Bi heterostructures following photo-excitation. We further reveal that this type of THz radiation can be selectively superimposed on the emission discovered recently due to the inverse Spin Hall effect, yielding a unique film thickness dependent emission pattern. Our results thus offer new opportunities for versatile broadband THz radiation using the interface quantum effects. |
| Databáze: |
arXiv |
| Externí odkaz: |
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