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Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

Optimized terahertz-wave generation using BNA-DFG.

Katsuhiko Miyamoto¹, Seigo Ohno, Masazumi Fujiwara

¹Tera-photonics laboratory, RIKEN Sendai, 519-1399, Aramaki-aoba, Aoba-ku, Sendai, Miyagi 980-0845, Japan. k-miyamoto@faculty.chiba-u.jp

|August 19, 2009

Summary

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Researchers optimized terahertz (THz) radiation production using difference-frequency generation (DFG) in an organic crystal. This method significantly enhanced THz-wave output range and power.

Area of Science:

Optics and Photonics
Materials Science
Condensed Matter Physics

Background:

Terahertz (THz) radiation generation is crucial for various scientific and technological applications.
Organic nonlinear crystals offer potential for efficient THz wave production.
Optimizing phase-matching conditions is key to maximizing THz output in difference-frequency generation (DFG).

Purpose of the Study:

To demonstrate an effective and widely tunable method for THz radiation production.
To optimize the difference-frequency generation (DFG) process in an organic N-benzyl-2-methyl-4-nitroaniline (BNA) crystal.
To achieve a broad frequency range and high power output for THz waves.

Main Methods:

Calculated the wideband refractive index and coherence length mapping of the BNA crystal.

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Last Updated: Jun 20, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters

Published on: July 8, 2013

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

Optimized phase-matching conditions for DFG by tuning pump wavelengths (780-950 nm).

Investigated the optical wavelength dependency of the THz-wave output.

Main Results:

Successfully demonstrated tunable THz radiation generation in the 0.1-20 THz range.
Achieved a ten-fold increase in THz power output compared to previous methods.
Established a clear optical wavelength dependency of the THz-wave output.

Conclusions:

Optimized pump wavelengths in BNA crystals provide an effective route for tunable THz generation.
The developed DFG configuration significantly expands the capabilities for THz wave production.
This research offers a promising advancement for THz spectroscopy and imaging applications.