Plasmonic Micro-Antenna Characteristics Using Gold Grating Embedded in a Panda-Ring Circuit

An investigation of the plasmonic micro-antenna characteristics using an optical modified add–drop multiplexer embedded gold grating is proposed. A device consisting of a main microring and two nano-ring phase modulators is known as a Panda-ring resonator. A gold grating is embedded at the main ring center to induce plasmonic polariton, which is the plasmonic wave that oscillates with plasma frequency. At the resonance, the whispering gallery mode (WGM) of propagation light fields can be obtained by controlling the two suitable side ring parameters, from which the plasma resonant frequency is obtained by the graphical method called the Optiwave program. In manipulation, the light source with the wavelength of 1.55 μm is fed into the system. The input power was varied from 1 to 10 mW, from which the Bragg wavelength at the resonant peak is employed for all calculations. The directivity and gain of the plasmonic micro-antenna of 2.8 mW (4.47 dBm) and 0.78 mW (− 1.08 dBm) are obtained. The motivation for this study is that the plasmonic micro-antenna enhances the performance of optical/communication devices due to its extraordinary properties. The key finding is the operation of the plasmonic micro-antenna at optical frequencies using the Panda-ring circuit, which has dual modes for wireless and cable connections. In applications, the large-area antenna (multi-antennas) has the potential for atom, cell, and brain communication network investigations; regarding the linear relationship trend of the output gain, the use of the circuit for application in sensors is also possible.