Open AccessBroadband terahertz dispersion control in hybrid waveguides
Author(s) -
Tobias Fobbe,
Sergej Markmann,
F. Fobbe,
Negar Hekmat,
Had g,
Shovon Pal,
Patrick Balzerwoski,
Janne Savolainen,
Martina Havenith,
A. D. Wieck,
Nathan Jukam
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.022319
Subject(s) - terahertz radiation , optics , broadband , dispersion (optics) , frequency comb , ultrashort pulse , terahertz spectroscopy and technology , grating , materials science , optoelectronics , supercontinuum , waveguide , physics , photonic crystal fiber , optical fiber , laser
Dispersion control is a key objective in the field of photonics and spectroscopy, since it enhances non-linear effects by both enabling phase matching and offering slow light generation. In addition, it is essential for frequency comb generation, which requires a phase-lock mechanism that is provided by broadband compensation of group velocity dispersion (GVD). At optical frequencies, there are several well-established concepts for dispersion control such as prism or grating pairs. However, terahertz dispersion control is still a challenge, thus hindering further progress in the field of terahertz science and technology. In this work, we present a hybrid waveguide with both broadband, tuneable positive and more than octave-spanning negative terahertz GVD on the order of 10 -22 s 2 /m, which is suitable for either intra- or extra cavity operation. This new terahertz device will enable ultra-short pulse compression, allow soliton propagation, improve frequency comb operation and foster the development of novel non-linear applications.