Multifrequency and broadband optical antennas

Hualiang Zhang; J. Ding; Yuankun Lin

doi:10.1117/12.924352

7 May 2012 Multifrequency and broadband optical antennas

Hualiang Zhang, J. Ding, Yuankun Lin

Proceedings Volume 8373, Micro- and Nanotechnology Sensors, Systems, and Applications IV; 83732Y (2012) https://doi.org/10.1117/12.924352
Event: SPIE Defense, Security, and Sensing, 2012, Baltimore, Maryland, United States

Abstract

Traditional optical components have many drawbacks such as bulky size and suffering from the diffraction limits. In order to solve these problems, optical antennas have been proposed recently. It overcomes the constraints imposed by conventional optical devices, allowing unprecedented control of light-matter interactions within sub-wavelength volume. Up until now, almost all of the existing optical antennas can only operate at single fixed frequency. This has highlighted the need for designing optical antennas covering multiple working frequencies or broad frequency band to achieve more design and application flexibility. Motivated by this factor, in this paper, we design and investigate new optical antennas with multi-frequency and broadband operations. Specifically, we investigate several optical antenna topologies to introduce multiple resonant peaks. Potential candidate designs include the stepped-junction optical antenna, and the multi-junction optical antenna. Moreover, based on the concept of multiple-pair nano-dimer structure, broadband optical antennas are investigated, which can further enable us to control light over broad spectrum.

Citation Download Citation

Hualiang Zhang, J. Ding, and Yuankun Lin "Multifrequency and broadband optical antennas", Proc. SPIE 8373, Micro- and Nanotechnology Sensors, Systems, and Applications IV, 83732Y (7 May 2012); https://doi.org/10.1117/12.924352

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