Related Experiment Video
Updated: May 6, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
14.4K
Design and analysis of a silicon-based terahertz plasmonic switch
Optics Express
|October 24, 2013
Summary
A new terahertz (THz) plasmonic switch uses voltage control to alter silicon conductivity, enabling efficient manipulation of surface plasmon propagation for complex optical systems.
Area of Science:
- Optoelectronics
- Nanophotonics
- Terahertz Technology
Background:
- Surface plasmon propagation is crucial for nanoscale optical devices.
- Controlling plasmonic behavior with external stimuli is a key challenge in terahertz (THz) technology.
Purpose of the Study:
- To design and simulate a novel THz plasmonic switch.
- To demonstrate voltage-controlled manipulation of surface plasmon propagation.
- To enhance switch performance using a P-Intrinsic-N diode structure.
Main Methods:
- Device design involving a corrugated n-type silicon wafer with a metallic layer.
- Simulation of surface plasmon propagation control via applied voltage.
- Implementation of a p(++)-doped well to form a P-Intrinsic-N diode for enhanced control.
- Analysis using scattering matrix formalism.
Main Results:
- Applied voltage effectively modulates the depletion layer width and silicon conductivity.
- The P-Intrinsic-N diode structure enhances control over plasmon propagation by altering carrier densities.
- Simulation results validate the proposed switch's functionality.
Conclusions:
- The designed THz plasmonic switch offers effective voltage-controlled manipulation of surface plasmons.
- The integrated P-Intrinsic-N diode significantly improves device performance.
- The scattering matrix formalism provides a concise explanation essential for complex plasmonic system design.
