Frequency tuning for broadband terahertz emission from two-color laser-induced air plasma

Wang, Linzheng and Zhang, Zhelin and Xia, Tianhao and Chen, Yanping and Sheng, Zhengming (2022) Frequency tuning for broadband terahertz emission from two-color laser-induced air plasma. Journal of the Optical Society of America B: Optical Physics, 39 (3). A68-A74. ISSN 1520-8540 (https://doi.org/10.1364/JOSAB.444735)

[thumbnail of Wang-etal-JOSABOP-2021-Frequency-tuning-for-broadband-terahertz-emission-from-two-color-laser-induced-air-plasma]
Preview
 Text. Filename: Wang_etal_JOSABOP_2021_Frequency_tuning_for_broadband_terahertz_emission_from_two_color_laser_induced_air_plasma.pdf
Final Published Version
Download (3MB)| Preview

Abstract

Effective manipulation of broadband terahertz emission, especially on spectrum tuning, is of great importance for many applications. We demonstrate a method to realize frequency tuning of terahertz emissions from two-color laser-induced air plasmas. The terahertz central frequency is switched from 0.56 to 0.82 THz by changing the polarization state of the fundamental wave with a quarter-wave plate. Based on numerical simulation, it is found that this frequency tuning is due to the birefringence effect induced by the fundamental wave on the second harmonic inside the filament, which leads to a discrepancy on the polarization chirality of the two-color laser components. Two-color lasers with opposite chirality will emit terahertz radiation with higher central frequency compared to two-color lasers with the same chirality at moderate laser intensity.

ORCID iDs

Wang, Linzheng, Zhang, Zhelin, Xia, Tianhao, Chen, Yanping and Sheng, Zhengming ORCID logoORCID: https://orcid.org/0000-0002-8823-9993;
  • Item type:Article
    ID code:79942
    Dates:
    Date
    Event
    28 January 2022
    Published
    21 December 2021
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:23 Mar 2022 16:38
    Last modified:11 Nov 2024 13:26
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/79942
CORE (COnnecting REpositories)