Cheng, L.; Huang, K.; Wang, Y.; Wu, F. Dynamic Tunable Deflection of Radiation Based on Epsilon-Near-Zero Material. Photonics2023, 10, 688.
Cheng, L.; Huang, K.; Wang, Y.; Wu, F. Dynamic Tunable Deflection of Radiation Based on Epsilon-Near-Zero Material. Photonics 2023, 10, 688.
Cheng, L.; Huang, K.; Wang, Y.; Wu, F. Dynamic Tunable Deflection of Radiation Based on Epsilon-Near-Zero Material. Photonics2023, 10, 688.
Cheng, L.; Huang, K.; Wang, Y.; Wu, F. Dynamic Tunable Deflection of Radiation Based on Epsilon-Near-Zero Material. Photonics 2023, 10, 688.
Abstract
Epsilon-near-zero nanoantennas can be used to tune the far-field radiation pattern due to their exceptionally large intensity-dependent refractive index. Here, we propose hybrid optical antenna based on indium tin oxide (ITO) to optically tune the deflection of radiation. In particular, a hybrid structure antenna of ITO and dielectric material, which makes the deflection angle changes 17 ∘ as incident intensities increases. Finally, the array of ITO or hybrid nanodisks can enhance the unidirectionality to be needle-like, with the angular beam width α< 8∘ of main lobe. The deflection angle of radiation pattern response with needle-like lobe pave the way for further studies and applications in beam steering and optical modulation where dynamic control of the nanoantennas is highly desirable.
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