Coin Paradox Spin–Orbit Interaction Enhances Magneto-Optical Effect and Its Application in On-Chip Integrated Optical Isolator
| Autor: | Hongjin Wu, Hao Hu, Zongqiang Chen, Qiang Wu, Jingjun Xu, Jianghong Yao, Qian Sun, Xuanyi Yu, Jiwei Qi, Xianhui Fu, Sihao Zhang, Jing Chen |
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| Rok vydání: | 2021 |
| Předmět: |
Physics
Nano Express Optical isolator business.industry Physics::Optics Spin–orbit interaction Condensed Matter Physics law.invention Magneto optical law Spin–orbit interactions Magneto-optic effect TA401-492 Optoelectronics General Materials Science Isolator Coin paradox business Materials of engineering and construction. Mechanics of materials |
| Zdroj: | Nanoscale Research Letters, Vol 16, Iss 1, Pp 1-7 (2021) Nanoscale Research Letters |
| ISSN: | 1556-276X |
| DOI: | 10.1186/s11671-021-03634-8 |
| Popis: | We designed a simple on-chip integrated optical isolator made up of a metal–insulator–metal waveguide and a disc cavity filled with magneto-optical material to enhance the transverse magneto-optical effect through the coin paradox spin–orbit interaction (SOI). The simulation results of the non-reciprocal transmission properties of this optical structure show that a high-performance on-chip integrated optical isolator is obtained. The maximum isolation ratio is greater than 60 dB with a corresponding insertion loss of about 2 dB. The great performance of the optical isolator is attributed to the strong transverse magneto-optical effect, which is enhanced by the coin paradox SOI. Moreover, the enhancement of the transverse magneto-optical effect through the coin paradox SOI is more substantial for smaller azimuthal mode number n. Benefiting from this, the transverse magneto-optical effect remains strong in a wide wavelength range. Additionally, a smaller cavity has a stronger transverse magneto-optical effect in the same wavelength range. Our research provides a new perspective for creating highly integrated magneto-optical devices. |
| Databáze: | OpenAIRE |
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