Flexible control over polarization tuning using electric wiggler during terahertz generation

Manendra,; Singh, Kunwar P.; Jewariya, Mukesh; Chaudhary, Pradeep; Malik, Anil Kumar

doi:10.1016/j.optlaseng.2023.107589

Cited by 2 publications

(1 citation statement)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 3 ] Recently, the polarization state of THz wave has been controlled by single/two‐photon excitation, [ 4 ] spatial light modulators, [ 5,6 ] and external electric oscillating bias. [ 7 ] However, these modulation methods often necessitate additional components, which would lead to insertion losses and reduce THz wave regulation flexibility. Metamaterials as composites of artificial structures offer a solution for designing polarized THz devices due to their precise geometry, structural designability, and tunable electromagnetic function.…”

Section: Introductionmentioning

confidence: 99%

Manipulating Nonlinear Photocurrent from Interlayer Coupling in Bilayer Metamaterials for Polarized Terahertz Generation

Shi,

Lei,

et al. 2023

Annalen der Physik

View full text Add to dashboard Cite

Polarized terahertz (THz) wave generation is of great significance for chiral and anisotropic sensing applications. However, how to manipulate amplitude, polarization, and ellipticity of the THz generation is still a fundamental challenge. Herein, polarized THz wave generation is achieved from a bilayer metamaterial consisting of T‐shaped structure (TSS) and split resonator rings (SRRs) by combining Maxwell and hydrodynamic equations. The elliptically polarized THz wave can be synthetized directly from horizontally and vertically polarized THz components due to the orthogonal nonlinear photocurrents along the arm‐directions of TSS and SRRs, respectively. Besides, the ellipticity and the orientation angle of the THz polarization ellipse can be modulated by the twist angle between the SRRs and TSS layers. The maximum ellipticity can reach 0.34 while the orientation angle is tunable from −0.45 to 0.48π by tuning the twist angle. This work proposes an interlayer coupling method for the polarized THz sources based on metamaterials in potential circular dichroism and chiral sensing applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Manipulating Nonlinear Photocurrent from Interlayer Coupling in Bilayer Metamaterials for Polarized Terahertz Generation

Shi,

Lei,

et al. 2023

Annalen der Physik

View full text Add to dashboard Cite

show abstract

A strong-field THz light source based on coherent transition radiation

Kang,

Wang,

Chen

et al. 2023

Front. Phys.

View full text Add to dashboard Cite

Terahertz (THz) radiation is a powerful tool for exploring various scientific frontiers through THz pump–probe experiments. However, different experiments may require THz radiation with different spectral properties, such as broad-band or narrow-band, which are difficult to be generated by a single light source. In this paper, we propose a THz light source that can produce both types of THz radiation by manipulating the longitudinal profile of an electron beam and exploiting coherent transition radiation. We perform theoretical analysis and numerical simulations based on the parameters of the Shanghai soft X-ray Free-Electron Laser facility, and the results show that the proposed light source can generate broad-band THz radiation with a pulse energy of 342 µJ and narrow-band THz radiation with a pulse energy of 91 µJ. The proposed light source can offer more flexibility and versatility for free-electron laser (FEL) users to conduct THz pump–probe experiments.

show abstract

Flexible control over polarization tuning using electric wiggler during terahertz generation

Cited by 2 publications

References 43 publications

Manipulating Nonlinear Photocurrent from Interlayer Coupling in Bilayer Metamaterials for Polarized Terahertz Generation

Manipulating Nonlinear Photocurrent from Interlayer Coupling in Bilayer Metamaterials for Polarized Terahertz Generation

A strong-field THz light source based on coherent transition radiation

Contact Info

Product

Resources

About