Broadband directional rhombic nanoantenna for optical wireless communications systems

Abstract

In this paper, an optimized four-nanowire rhombic nanoantenna (RNA) is proposed and numerically analyzed in terms of directivity and efficiency. The suggested design achieves a directivity of 23.4 with 84.5% radiation efficiency at a wavelength of 1550 nm. Further, the suggested nanoantenna (NA) design offers a high gain of 18.5 with an enhancement of 172%, compared to the previously reported plasmonic horn NA. Additionally, the wireless transmission power of the nanolink based on the optimized rhombic design is analyzed. The numerical results reveal that the RNA enjoys a much lower loss by 32 dB and 12 dB, respectively, when compared to the dipole and plasmonic horn NAs. Moreover, the reported design has broadband operation features over the optical C-band range, making it a promising candidate for applications related to optical communications nanochips.

Numerical and Experimental Analysis of On-Chip Optical Wireless Links in Presence of Obstacles

“…Recently, Optical-Wireless-NoCs (OWiNoCs) have been proposed as an approach that combines optical wires with optical wireless links as a mean for intra/inter-chip communication [10][11][12][13]. Today, research on optical wireless links over long distances stands on established technologies and methods, whereas it is still in early stages at on-chip-scale distances.…”

“…An important requirement for optical antennas for OWiNoCs is a high gain in the longitudinal direction (onchip plane). On this frame, two types of antennas have been developed in recent years, the plasmonic and the dielectric ones [10][11][12][13][18][19][20], both with their specific traits [20]. Dielectric antennas [10,20] allow to reach very high gain in the longitudinal direction, between 16-23 dB.…”

“…In previous studies, structures with increasing geometrical complexity have been addressed by considering, initially, simple boundless homogeneous media [10][11][12][13][18][19][20][21][22][23]. Then, more realistic structures based on a homogeneous cladding, with air on top and Silicon layer on bottom, have been considered using both RT and FDTD [21][22][23][24].…”

Design and Analysis of Rectangular Spiral Nano-Antenna for Solar Energy Harvesting

“…Zhao et al [16] designed an Archimedean nanospiral antenna for solar energy application with a high harvesting efficiency of about 80% at a wavelength of 500 nm and a maximum directivity about 3.5. In 2020, Elsaid et al [17] proposed and analyzed an optimized four-nanowire rhombic NA in terms of directivity and efficiency. Elsaid's design achieved a directivity of 23.4 and radiation efficiency of 84.5% at a wavelength of 1550 nm.…”

“…In this paper, the 3D finite integration technique (FIT) [17] is utilized to investigate and analyze the performance of the suggested rectangular spiral NA. A spiral NA is particularly chosen in our work as it is efficient in collecting the solar energy, and it is a frequency independent NA which operates over a wide frequency range.…”