Low Optical Power-Driven THz Modulator
Julien Guise  1@  , Thierry Taliercio  2@  , Stéphane Blin  1@  , Emmanuel Centeno  3@  
1 : Institut d'Electronique et des Systèmes
Université de Montpellier, Centre National de la Recherche Scientifique : UMR5214
860, rue Saint Priest, Bâtiment 5 - CC 05001 -34095 Montpellier Cedex 5 -  France
2 : Institut d'Electronique et des Systèmes
Université de Montpellier, Centre National de la Recherche Scientifique : UMR5214
860, rue Saint Priest, Bâtiment 5 - CC 05001 -34095 Montpellier Cedex 5 -  France
3 : Institut Pascal - Clermont Auvergne  (IP)
SIGMA Clermont, Université Clermont Auvergne : UMR6602, Centre National de la Recherche Scientifique : UMR6602
24 avenue des Landais / 63171 Aubiere Cedex -  France

The THz domain is a field of intense research. Today, we note that many sources and detectors exist but only a few modulators are available with low power consumption and weak footprint. In this perspective, previous works have demonstrated the possibility to optically modulate a THz beam passing through an InAs slab by photogenerating free carriers. In the continuity of this work, we seek to reduce the required optical pump power by carrying out a study on a numerical model implemented on MATLAB. We numerically show thay by reducing the size of the THz and IR beams we can reach up to 90% transmission modulation depth. 


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