Design, Modeling, and Numerical Characteristics of the Plasmonic Dipole Nano-Antennas for Maximum Field Enhancement

Authors

  • Thi Thanh Kieu Nguyen Faculty of Engineering, Binh Thuan Province Vocational College, Binh Thuan, Vietnam
  • Quang Minh Ngo Institute of Materials Science, Vietnam Academy of Science and Technology 18 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
  • Truong Khang Nguyen 3 Division of Computational Physics, Institute for Computational Science Ton Duc Thang University, Ho Chi Minh City, Vietnam 4 Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

Keywords:

Absorption, far-field power pattern, localized electric field, nano-antenna, reflection, surface plasmon resonance

Abstract

In this paper, we investigate the near-field enhanced optical absorption and far-field radiation characteristics of plasmonic dipole nano-antenna with different geometries which are rectangular, square, circular, and ellipse dipoles. Localized E-field enhancement at the excitation gap and reflection profile in an infinite 2D array of each nano-antenna are characterized and optimized at the resonant frequency of 375 THz, which corresponds to the incident wavelength of 800 nm. Numerical results show that the ellipse nano-antenna produces the most enhanced electric field at the excitation gap whereas the circular nano-antenna yields the best reflection and far-field radiation characteristics. This research is useful for the researchers and designers in choosing appropriate plasmonic dipole nano-antennas when incorporating with a photoconductive antenna for terahertz radiation enhancement.

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Published

2021-07-30

How to Cite

[1]
Thi Thanh Kieu Nguyen, Quang Minh Ngo, and Truong Khang Nguyen, “Design, Modeling, and Numerical Characteristics of the Plasmonic Dipole Nano-Antennas for Maximum Field Enhancement”, ACES Journal, vol. 32, no. 07, pp. 634–641, Jul. 2021.

Issue

2017: Vol 32 Iss 7

Section

General Submission