Efficient and wideband horn nanoantenna.

Area of Science:

• Plasmonics and Nanophotonics
• Antenna Engineering

Background:

• Near-infrared (near-IR) frequencies are crucial for various optical applications.
• Efficient nanoantennas are needed to manipulate light at the nanoscale.
• Existing nanoantenna designs often face limitations in bandwidth and efficiency.

Purpose of the Study:

• To design and validate a novel horn nanoantenna operating at near-IR frequencies.
• To achieve a broadband impedance match and high radiation efficiency.
• To explore potential applications in optical wireless communications and smart lighting.

Main Methods:

• Design of a nanotransmission line structure using Silver (Ag) and air.
• Termination of the transmission line with a tapered horn.
• Full-wave numerical simulations incorporating material dispersion and losses.

Main Results:

• The designed nanohorn exhibits impedance matching over a broad frequency range (>50% fractional bandwidth).
• Efficient radiation is achieved within the same frequency band, with a realized gain exceeding 10 dBi.
• The simulation results validate the antenna's performance characteristics.

Conclusions:

• The proposed horn nanoantenna is a high-performance device for near-IR applications.
• Its broadband operation and efficient radiation make it suitable for advanced optical systems.
• Potential applications include optical wireless communications and smart lighting solutions.