Zhichao Xu, Na Li, Baoyan Duan. Design of Broadband Spiral Nanoantenna Based on Solar Energy Harvesting[J]. Acta Optica Sinica, 2017, 37(8): 0826003
- Acta Optica Sinica
- Vol. 37, Issue 8, 0826003 (2017)
Fig. 1. Block diagram of nanorectenna and load
Fig. 2. Results comparison between FDTD method and MOM result
Fig. 3. Three-dimensional structure of the spiral nanoantenna
Fig. 4. Radiation efficiency of the spiral nanoantenna with different numbers of ring as a function of wavelength and the total efficiency of the nanoantenna
Fig. 5. Radiation efficiency of the spiral nanoantenna with different widths of arm as a function of wavelength and the total efficiency of the nanoantenna
Fig. 6. Radiation efficiency of the spiral nanoantenna with different heights of arm as a function of wavelength and the total efficiency of the nanoantenna
Fig. 7. Three-dimensional spiral nanoantenna with substrate
Fig. 8. Radiation efficiency of the spiral nanoantenna with different substrate thicknesses as a function of wavelength and the total efficiency of the nanoantenna
Fig. 9. Absorption of spiral nanoantenna to sunlight with different wavelengths
Fig. 10. Response of spiral nanoantenna at different polarization directions
Fig. 11. Electric field distribution of the spiral nanoantenna at λ=800 nm. (a) x axis-polarized; (b) 45° to x axis-polarized; (c) y axis-polarized
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