Enhance terahertz radiation and its polarization- control with two paralleled filaments pumped by two-color femtosecond laser fields | Zendy

Qiying Song | Zendy; Xinming Yuan | Zendy; Saisai Hu | Zendy; Jiefeng Huang | Zendy; Haizhe Zhong | Zendy; Qinggang Lin | Zendy; Honggeng Wang | Zendy; Xiaowei Lu | Zendy; Maijie Zheng | Zendy; Yi Cai | Zendy; Xuanke Zeng | Zendy; Shixiang Xu | Zendy

Open Access

Enhance terahertz radiation and its polarization- control with two paralleled filaments pumped by two-color femtosecond laser fields

Author(s) -

Qiying Song,

Xinming Yuan,

Saisai Hu,

Jiefeng Huang,

Haizhe Zhong,

Qinggang Lin,

Honggeng Wang,

Xiaowei Lu,

Maijie Zheng,

Yi Cai,

Xuanke Zeng,

Shixiang Xu

Publication year - 2021

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.427896

Subject(s) - terahertz radiation , optics , laser , femtosecond , polarization (electrochemistry) , electric field , photocurrent , photomixing , terahertz spectroscopy and technology , radiation , linear polarization , optoelectronics , far infrared laser , materials science , physics , radial polarization , laser beams , terahertz metamaterials , laser beam quality , chemistry , quantum mechanics

We present experimentally an obvious enhancement of the terahertz (THz) radiation with two paralleled filaments pumped by two-color laser fields for a full use of a high laser power, compared with single filament. By mapping the 3-dimensional electric trajectories of generated THz fields with a (111) ZnTe crystal, we observe that the total THz polarization from two filaments can be manipulated by varying the time delay between the two orthogonally polarized pumps, which agrees well with the simulations under the photocurrent model. Notably, the power and spectrum of the THz field almost keep unchanged while manipulating the ellipticity of the THz polarization, which is important for a polarization-controllable THz source.

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