Efficient nearly-circularly-polarized terahertz generation from an air plasma pumped by collinear and circularly polarized two-color laser fields

We theoretically investigate the polarized terahertz (THz) generation in laser–gas interaction using circularly polarized (CP) two-color laser pulses with uncommon frequencies. We show that these laser pulses can be applied to generate polarized THz radiation, and the polarization of THz radiation, which ranges from linear to circular, can be controlled in a flexible manner by manipulating the laser parameters, such as the relative phase and phase angle. Furthermore, in contrast to traditional harmonic frequency combinations, the polarization states of the incommensurate lasers undergo complex evolution with the phase angle, resulting in a noteworthy influence on the THz yield. The obtained results could deepen our understanding of polarized THz radiation generation.

show abstract

Polarization-controlled terahertz generation by bicircular longer-wavelength laser fields

Wang

Huang

et al. 2022

J. Opt. Soc. Am. B

View full text Add to dashboard Cite

When compared with other laser configurations, stronger terahertz (THz) waves can be generated from gaseous plasmas driven using two-color ω + 2 ω circularly polarized laser fields with the same helicity (CP-S), but consideration of the THz polarization state shows that these waves are linearly polarized. Here, we show that polarization-controlled THz radiation, including circularly polarized radiation, can be generated using CP-S pump fields. Unlike the conventional multi-cycle 800 n m + 400 n m combination, we use longer-wavelength or few-cycle laser pulses to generate nonzero net currents along two orthogonal directions with a ∼ ± π / 2 phase difference between them because of laser field symmetry breaking. When the current distribution’s axis of symmetry is ascertained, the THz polarization direction can be confirmed.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Efficient nearly-circularly-polarized terahertz generation from an air plasma pumped by collinear and circularly polarized two-color laser fields

Cited by 9 publications

References 34 publications

Propagation effects of bichromatic laser pulses on the induced terahertz-radiation generation in a gaseous medium

Propagation effects of bichromatic laser pulses on the induced terahertz-radiation generation in a gaseous medium

The manipulation of polarized terahertz generation by incommensurate two-color laser pulses with circular polarization

Polarization-controlled terahertz generation by bicircular longer-wavelength laser fields

Contact Info

Product

Resources

About