The Institute of Laser for Postgraduate Studies at University of Baghdad discussed the thesis submited by the student Mohanad Musa Jamil titled: “Implementation of tunable nano antenna in communication window,” under the supervision of Dr. Jawad Abdul-Kadhim Hassan. The thesis aimed to develop advanced designs for nano-antennas using single-wall carbon nanotubes (SWCNT) based on quantum theory for next-generation applications in optical and plasmonic communication systems. The work included studying three innovative designs to enhance the efficiency of dipole nano-antennas:
1. The first design relied on enhancing signal pumping using a gold plate at the feeding point.
2. The second design involved a simple dipole antenna made of carbon nanotubes without a gold plate, studied within an array of antennas.
3. The third design combined metallic and plasmonic properties by integrating gold nanorods within single-wall carbon nanotube shells.
The simulation results using CST Microwave Studio software showed a significant reduction in dimensions, a radiation efficiency reaching 80%, reflection losses less than −10 dB, and a radiation gain of 1.18 dBi within the optical frequency range (500–600 THz). The research also featured the application of On-Off Keying (OOK) modulation technique on the nano-antenna by controlling the voltage at the nano-gap, allowing it to be directly integrated into photonic and electronic circuits. Additionally, the thesis presented the design of a steerable plasmonic antenna capable of narrowing the beam width from 30° to 10°, with the ability to tune operation within the visible spectrum over 200 THz, achieving a radiation efficiency of 45% and a gain of 4.5 dBi.
The study concluded that these designs offer promising solutions in the fields of remote sensing, ultra-fast optical communications, and nano-imaging, with the potential for integration into compact and high-performance photonic devices in the future.
