Dual-frequency terahertz emission from splitting filaments induced by lens tilting in air

Journal Article · Mon Sep 08 04:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4895720· OSTI ID:22310816

Zhang, Zhelin; Chen, Yanping; Yang, Liu; Yuan, Xiaohui; Liu, Feng; Chen, Min; Xu, Jianqiu; Zhang, Jie ^[1]; Sheng, Zhengming ^[1]

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1. Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)

Dual-frequency terahertz radiation from air-plasma filaments produced with two-color lasers in air has been demonstrated experimentally. When a focusing lens is tilted for a few degrees, it is shown that the laser filament evolves from a single one to two sub-filaments. Two independent terahertz sources emitted from the sub-filaments with different frequencies and polarizations are identified, where the frequency of terahertz waves from the trailing sub-filament is higher than that from the leading sub-filament.

• OSTI ID: 22310816
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 10 Vol. 105; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AIR
COLOR
EMISSION
FILAMENTS
LASER RADIATION
PLASMA FILAMENT
POLARIZATION