RT Journal Article
T1 Frequency selective optoelectronic downconversion of a Terahertz Pulse Using ErAs:In(Al)GaAs Photoconductors
A1 Fernandez Olvera, Anuar De Jesus
A1 Krause, Benedikt Leander
A1 Betancur Pérez, Andrés Felipe
A1 Nandi, Uttam
A1 Dios Fernández, Cristina de
A1 Acedo Gallardo, Pablo
A1 Preu, Sascha
AB We introduce a new scheme for the detection of terahertz pulses based on the frequency selective optoelectronic downconversion of its individual modes with a continous-wave (CW) ErAs:InGaAs photoconductive antenna (PCA) driven by a comb-based CW photonic signal. The detection scheme can be used as metrology tool for the analysis of the fundamental resolution and stability limits of terahertz pulses and the mode-locked-lasers (MLLs) that drives them, as well as an ultra-high-resolution measurement technique for terahertz components or gas spectroscopy. We demonstrate both applications by measuring the linewidth of two frequency components of the particular terahertz pulse analyzed here (one at 75 GHz and one at 340 GHz) and by measuring a very narrowband filter between 70 and 80 GHz. The main advantage of this technique with respect to other terahertz pulse detection schemes is its capability of performing ultra-high-resolution measurements without the need of unpractically long scanning ranges or synchronization of two MLLs.
PB IEEE
SN 2169-3536
YR 2021
FD 2021-07-02
LK https://hdl.handle.net/10016/37335
UL https://hdl.handle.net/10016/37335
LA eng
NO This work was supported in part by the European Union Marie Curie Sklodowska Actions through the Innovative Training Network (ITN), (CELTA) under Project 675683, and in part by the European Starting Grant (ERC) (Pho-T-Lyze) under Project 713780.
DS e-Archivo
RD 18 jul. 2024