Pulsed THz radiation under ultrafast optical discharge of vacuum photodiode-Reference-Cited by-同舟云学术

Pulsed THz radiation under ultrafast optical discharge of vacuum photodiode

Published:2024-06-13 Issue:1 Volume:17 Page:
ISSN:2095-2767
Container-title:Frontiers of Optoelectronics
language:en
Short-container-title:Front. Optoelectron.

Author:

Ushakov Aleksandr,Mamaeva Kseniia,Seleznev Leonid,Rizaev Georgy,Bukin Vladimir,Dolmatov Timophey,Chizhov Pavel,Bagdasarov Vladimir,Garnov Sergey

Abstract

AbstractIn this paper, we first present an experimental demonstration of terahertz radiation pulse generation with energy up to 5 pJ under the electron emission during ultrafast optical discharge of a vacuum photodiode. We use a femtosecond optical excitation of metallic copper photocathode for the generation of ultrashort electron bunch and up to 45 kV/cm external electric field for the photo-emitted electron acceleration. Measurements of terahertz pulses energy as a function of emitted charge density, incidence angle of optical radiation and applied electric field have been provided. Spectral and polarization characteristics of generated terahertz pulses have also been studied. The proposed semi-analytical model and simulations in COMSOL Multiphysics prove the experimental data and allow for the optimization of experimental conditions aimed at flexible control of radiation parameters. Graphical Abstract

Publisher

Springer Science and Business Media LLC

Link

https://link.springer.com/content/pdf/10.1007/s12200-024-00123-5.pdf

Reference26 articles.

1. Zhang, X.C., Xu, J.: Introduction to THz Wave Photonics. Springer, New York (2010)

2. Grischkowsky, D., Keiding, S., Van Exter, M., Fattinger, C.: Far-infrared time-domain spectroscopy with terahertz beams of dielectrics and semiconductors. J. Opt. Soc. Am. B 7(10), 2006–2015 (1990)

3. Chan, W.L., Deibel, J., Mittleman, D.M.: Imaging with terahertz radiation. Rep. Prog. Phys. 70(8), 1325–1379 (2007)

4. Jen, C.Y., Richter, C.: Sample thickness measurement with THz-TDS: resolution and implications. Int. J. Infrared Millim. Terahertz Waves 35(10), 840–859 (2014)

5. Ushakov, A., Chizhov, P., Bukin, V., Savel’ev, A., Garnov, S.: Broadband in-line terahertz 2D imaging: comparative study with time-of-flight, cross-correlation, and Fourier transform data processing. J. Opt. Soc. Am. B 35(5), 1159–1164(2018)