High-field half-cycle terahertz radiation from relativistic laser interaction with thin solid targets

W. J. Ding, Z. M. Sheng, W. S. Koh

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)
74 Downloads (Pure)


It is found that half-cycle terahertz (THz) pulses with the peak field over 100 MV/cm can be produced in ultrashort intense laser interactions with thin solid targets. These THz pulses are shown to emit from both the front and rear sides of the solid target and are attributed to the coherent transition radiation by laser-produced ultrashort fast electron bunches. After the primary THz pulses, subsequent secondary half-cycle pulses are generated while some refluxing electrons cross the vacuum-target interfaces. Since such strong THz radiation is well synchronized with the driving lasers, it is particularly suitable for applications in various pump-probe experiments.

Original languageEnglish
Article number204107
Number of pages5
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 14 Nov 2013


  • hot carriers
  • terahertz radiation
  • nonlinear dynamics
  • carrier generation

Cite this