Details

Autor(en) / Beteiligte

• Han, Feng-Yuan
• Yin, Li-Zheng
• Zhang, Zi-Wen
• Zhao, Jin
• Wang, Yi-Dong
• Du, Chao-Hai
• Liu, Pu-Kun

Titel

Fast Construction of Dual-Field Superfocusing Based on Forward-Propagation Design

Ist Teil von

• IEEE antennas and wireless propagation letters, 2021-09, Vol.20 (9), p.1814-1818

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2021

Quelle

IEEE

Beschreibungen/Notizen

• A three-port plasmonic array is proposed to achieve a dual-field superfocusing using the forward-propagation method based on spatial Fourier transform. The algorithm of fast Fourier transform is used to facilitate the design process. Both the electric and magnetic fields can be superfocused on the focal plane of z = 0.1 λ ( λ is the free-space wavelength) based on an effect of radiationless electromagnetic interference. The full widths of the half-maximum of both two fields are 0.060 λ and 0.072 λ , respectively. Besides, the metrics of the dual-field superfocusing are 1.67 and 1.39. The proposed theory can simplify the design process of superfocusing, and the plasmonic array with brief three ports can sufficiently facilitate the construction of the desired source. This letter can be beneficial for the development of beam steering, sophisticated holography, super-resolution imaging, and other applications of near- or far-field devices.