Related Experiment Video
Updated: May 18, 2026
10:54
Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Tuning of a nonlinear THz emitter
A Andronico1, S Mariani, F Ghiglieno
1Univ. Paris Diderot, Sorbonne Paris Cit´e, Laboratoire MPQ, CNRS-UMR 7162 Case courrier 7021, 75205 Paris Cedex 13, France.
Optics Express
|October 6, 2012
Summary
This study explores a new terahertz (THz) source using aluminum gallium arsenide (AlGaAs) microcavities. Ring-like structures enhance tuning and efficiency for nonlinear frequency generation.
Area of Science:
- Photonics and Optics
- Semiconductor Physics
- Nonlinear Optics
Background:
- Terahertz (THz) radiation generation is crucial for various scientific and technological applications.
- Microcavity structures offer enhanced light-matter interaction for nonlinear optical processes.
- Aluminum Gallium Arsenide (AlGaAs) is a promising material for optoelectronic devices.
Purpose of the Study:
- To numerically investigate a passive THz source.
- To explore difference frequency generation (DFG) in cylindrical AlGaAs microcavities.
- To assess the impact of microcavity geometry on THz generation efficiency.
Main Methods:
- Numerical simulations of nonlinear optical processes.
- Modeling of mode-sustained DFG in cylindrical AlGaAs microcavities.
- Analysis of nonlinear overlap integral and conversion efficiency.
Main Results:
- Cylindrical AlGaAs microcavities support multiple modes for DFG.
- Ring-like microcavity structures provide enhanced tunability for THz generation.
- Ring-like structures maximize the nonlinear overlap integral and conversion efficiency.
Conclusions:
- Passive THz sources can be efficiently realized using AlGaAs microcavities.
- Ring-like geometries are advantageous for optimizing nonlinear frequency conversion processes.
- This work paves the way for improved THz source design and performance.
