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Related Experiment Video

Updated: May 18, 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

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.

|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.

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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.