Broadband heterodyne electro-optic sampling using a lithium niobate ridge-waveguide

Mine, S., Gandubert, G., Nkeck, J. E., Ropagnol, X., Murate, K. et Blanchard, F.. 2024. « Broadband heterodyne electro-optic sampling using a lithium niobate ridge-waveguide ». Applied Physics Express, vol. 17, nº 4.

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Résumé

We demonstrated the bandwidth broadening of terahertz waves detected by heterodyne electro-optical sampling by implementing a ridge waveguide structure in a lithium niobate (LiNbO3) crystal. Such an approach effectively reduces absorption loss, eases the phase matching condition and enhances the nonlinear interaction length through the optical confinement effect. As a result, we have more than doubled the bandwidth and improved the signal-to-noise ratio compared with an equivalent approach in a bulk LiNbO3 crystal. Heterodyne electro-optic sampling in a ridged-waveguide structure is only marginally dependent on the probe beam wavelength, suggesting its potential as a versatile method for broadband terahertz detection.

Type de document:	Article publié dans une revue, révisé par les pairs
Professeur:	Professeur Blanchard, François
Affiliation:	Génie électrique
Date de dépôt:	10 mai 2024 18:54
Dernière modification:	13 mai 2024 15:03
URI:	https://espace2.etsmtl.ca/id/eprint/28642

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