Field-Effect Plasmonic Transistors Based on Metallic-Semiconducting Carbon Nanotube Junctions

Area of Science:

• Physics
• Materials Science
• Electrical Engineering

Background:

• Nanophotonic circuits offer solutions to electronic circuit limitations, especially frequency barriers.
• Development is hindered by a lack of essential components like deep-subwavelength plasmons and plasmonic transistors.

Purpose of the Study:

• To demonstrate Luttinger-liquid field-effect plasmonic transistors (FEPTs) using metallic-semiconducting carbon nanotube junctions.
• To investigate the control of plasmon wave propagation across these junctions via electrostatic gating.

Main Methods:

• Fabrication of FEPTs utilizing metallic-semiconducting carbon nanotube junctions.
• Theoretical analysis and numerical simulations of plasmon propagation and reflection/transmission at junctions.

Main Results:

• Demonstrated efficient electrostatic gating control over plasmon wave propagation in Luttinger-liquid FEPTs.
• Showed that plasmon reflection/transmission at junctions follows the Fresnel equation, indicating classical laws persist for reduced-dimensionality plasmons.

Conclusions:

• Introduced a new class of FEPTs based on Luttinger-liquid behavior in carbon nanotube junctions.
• The findings facilitate the development of high-frequency nanophotonic circuits by providing fundamental insights into plasmon behavior.