Time-domain terahertz spectrometer for angular reflection measurements

23rd Congress of the International Commission for Optics

Nóvoa, José Antonio^1 ; Ordoñez, Ismael^1 ; Rial, Carmen^2 ; Martín, Jorge^1 ; Gil, Álvaro^2 ; Salgueiro, José Ramón^1

Departamento de Física Aplicada, Universidade de Vigo, As Lagoas, s/n, Ourense

32004, Spain^1

Instituto de Cerámica de Galicia, Universidade de Santiago de Compostela, Campus sur, Santiago de Compostela

15782, Spain^2

关键词: Angular reflection;    Frequency scale;    Main parameters;    Tera Hertz;    Terahertz band;    Terahertz spectrometer;    Time domain;    Time domain spectrometers;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/605/1/012026/pdf
DOI  :  10.1088/1742-6596/605/1/012026

来源: IOP

【 摘 要 】

We describe a terahertz time-domain spectrometer developed to perform measurements by reflection under a wide range of angles. The different parts of the device are described as well as the process of frequency-scale calibration and signal linearity evaluation. Also the main parameters that characterize the system and account their performance are measured. Finally an example of application to the measurement of the bandgap of a photonic crystal designed for the terahertz band is presented.