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Updated: Oct 28, 2025
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
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Optically controlled THz power tuning based on interference at transmission line.
Optics Express
|July 16, 2021
Summary
We developed an optical method to tune terahertz (THz) power using wave interference and optical delay. This technique allows continuous adjustment of THz power transmission, offering a compact solution for photonic circuits.
Area of Science:
- Photonics
- Terahertz (THz) technology
- Optoelectronics
Background:
- Terahertz (THz) power control is crucial for various applications.
- Existing methods for THz power tuning can be complex or limited in range.
- Integration of THz components into compact photonic circuits requires efficient tuning mechanisms.
Purpose of the Study:
- To propose and demonstrate an optically controlled THz power tuning method.
- To achieve continuous adjustment of THz power using wave interference.
- To verify the method's effectiveness with a fabricated monolithic chip.
Main Methods:
- Utilizing THz wave interference at a T-junction transmission line for power adjustment.
- Employing optical time delay of beat-note lightwaves for tuning control.
- Fabricating a monolithic InP chip integrating uni-traveling-carrier photodiodes and a planar slot antenna array for 300 GHz wave generation.
Main Results:
- Demonstrated continuous adjustment of THz power transmission.
- Achieved a wider tuning range exceeding 7 dB at the 300 GHz band.
- Verified the effectiveness of optical delay lines for THz power tuning.
Conclusions:
- The proposed optically controlled THz power tuning method is effective and offers a wide tuning range.
- The fabricated monolithic chip successfully demonstrates the proposed tuning principle.
- This method presents a promising solution for integrating compact THz wave planar photonic circuits.
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