Improved electrode design for interdigitated large-area photoconductive terahertz emitters.

Area of Science:

• Optics and Photonics
• Materials Science
• Electrical Engineering

Background:

• Terahertz (THz) emission efficiency is crucial for developing advanced THz sources.
• Large-area emitters based on interdigitated electrodes offer potential for high-power THz generation.
• Optimizing electrode parameters is key to maximizing THz output.

Purpose of the Study:

• To investigate the impact of electrode parameters on THz emission efficiency.
• To optimize electrode design for enhanced THz output from large-area emitters.
• To achieve maximum terahertz emission by balancing key design factors.

Main Methods:

• Systematic study of electrode parameter effects on THz emission.
• Optimization of electrode geometry and density for large-area emitters.
• Balancing individual electrode pair efficiency, emitter density, and semiconductor exposure for optical pumping.

Main Results:

• Identified optimal electrode parameters for maximizing THz emission efficiency.
• Achieved a significant enhancement of approximately 50% in peak-to-peak electric field.
• Demonstrated a superior performance compared to previous state-of-the-art designs.

Conclusions:

• Electrode parameter optimization is critical for high-efficiency THz emitters.
• The developed design offers a substantial improvement in THz emission performance.
• This work paves the way for more efficient large-area THz sources.