Wideband THz time domain spectroscopy based on optical rectification and electro-optic sampling

Tomasino, A, Parisi, A, Stivala, S, Livreri, P, Cino, A C, Busacca, A C, Peccianti, M and Morandotti, R (2013) Wideband THz time domain spectroscopy based on optical rectification and electro-optic sampling. Scientific Reports, 3 (3116). pp. 1-8. ISSN 2045-2322

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We present an analytical model describing the full electromagnetic propagation in a THz time-domain spectroscopy (THz-TDS) system, from the THz pulses via Optical Rectification to the detection via Electro Optic-Sampling. While several investigations deal singularly with the many elements that constitute a THz-TDS, in our work we pay particular attention to the modelling of the time-frequency behaviour of all the stages which compose the experimental set-up. Therefore, our model considers the following main aspects: (i) pump beam focusing into the generation crystal; (ii) phase-matching inside both the generation and detection crystals; (iii) chromatic dispersion and absorption inside the crystals; (iv) Fabry-Perot effect; (v) diffraction outside, i.e. along the propagation, (vi) focalization and overlapping between THz and probe beams, (vii) electro-optic sampling. In order to validate our model, we report on the comparison between the simulations and the experimental data obtained from the same set-up, showing their good agreement.

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects: Q Science > QC Physics > QC0350 Optics. Light > QC0450 Spectroscopy
T Technology > TA Engineering (General). Civil engineering (General) > TA1501 Applied optics. Photonics
Depositing User: Marco Peccianti
Date Deposited: 27 May 2014 08:21
Last Modified: 03 Jul 2019 01:50
URI: http://sro.sussex.ac.uk/id/eprint/47535

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