Numerical Demonstration of Angle-Independent Electromagnetic Transparency in Short-Wavelength Infrared Regimeopen access
- Authors
- Park, Junjeong; Hong, Sun K; Chung, Haejun
- Issue Date
- Apr-2022
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Finite-difference time-domain (FDTD) method; particle swarm optimization (PSO); plasmon induced transparency
- Citation
- IEEE ACCESS, v.10, pp.40402 - 40409
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE ACCESS
- Volume
- 10
- Start Page
- 40402
- End Page
- 40409
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187291
- DOI
- 10.1109/ACCESS.2022.3165052
- ISSN
- 2169-3536
- Abstract
- Realizing electromagnetic transparency in the visible light regime and beyond is an important challenge in both fundamental electromagnetics and angular-independent spectral filters for 6G communication and military applications. A conventional way of achieving electromagnetic transparency is based on Surface Plasmon Resonances (SPRs) of symmetric metallic spherical or cylindrical structures. However, symmetric objects have a constraint on their shape tunability, limiting them to visible wavelength applications. In this work, we address the limitation by designing floating nano-chips with a broken symmetry using a cluster of silver ellipsoids. We combine Bohren and Huffman analytic solutions and particle swarm optimization to accelerate the discovery of the optimum ellipsoid designs. The optimized nano-chips demonstrate clear angle-independent transparency at the 1450-1500nm wavelength window. This result is validated in full-wave Maxwell's solution via three-dimensional finite-difference time-domain method. The proposed design method can be extended to electromagnetic applications that require a design and optimization of small objects (< lambda/200) compared to their operating wavelength.
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