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Published on: March 23, 2017
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Metamaterial terahertz switch based on split-ring resonator embedded with photoconductive silicon.
Applied Optics
|May 14, 2015
Summary
This study presents a novel metamaterial terahertz (THz) switch with a sub-picosecond response time. The switch demonstrates tunable frequency operation, offering a wide switching window for THz applications.
Area of Science:
- Metamaterials
- Terahertz (THz) technology
- Optoelectronics
Background:
- Terahertz (THz) technology enables unique applications but requires efficient switching components.
- Metamaterials offer novel electromagnetic properties, making them promising for THz devices.
Purpose of the Study:
- To present and numerically investigate a novel metamaterial terahertz (THz) switch.
- To explore the switch's performance based on resonant modes and pump light power.
- To demonstrate the frequency tunability of the THz switch.
Main Methods:
- Numerical investigation of a metamaterial THz switch.
- Utilizing a split-ring resonator embedded with photoconductive silicon.
- Analysis of resonant modes at different pump light powers.
Main Results:
- The switch operates at two distinct resonant modes dependent on pump light power.
- Achieved a rapid response time of less than 1 picosecond (ps).
- Obtained a switching window from 1.26 to 1.49 THz with a large modulation depth (0.89 to 0.01 transmission).
Conclusions:
- The developed metamaterial THz switch exhibits excellent performance characteristics.
- The switch's frequency tunability is achieved by altering the dielectric layer's properties.
- This device holds potential for advanced THz systems requiring fast and tunable switching.
