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Updated: Jun 27, 2026
11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
Half-cycle-pulse terahertz emission from an ultrafast laser plasma in a solid target
Yuan Gao1, Tara Drake, Zhiyuan Chen
1Department of Physics and Astronomy, University of Delaware, 217 Sharp Laboratory, Newark, Delaware 19716, USA.
Optics Letters
|November 28, 2008
Summary
Researchers observed coherent far-infrared radiation from laser-driven plasma in copper. This ultrafast laser-plasma diagnostic method offers insights into dense plasma dynamics.
Area of Science:
- Physics
- Plasma Physics
- Optics
Background:
- Laser-driven plasmas are crucial for various scientific applications.
- Understanding ultrafast dynamics in dense plasmas is challenging.
- Far-infrared (far-IR) radiation can provide unique insights into plasma properties.
Purpose of the Study:
- To investigate the generation of coherent far-IR radiation from laser-produced plasmas in solid copper targets.
- To characterize the temporal properties of the emitted coherent radiation.
- To demonstrate a novel method for ultrafast laser-plasma diagnostics.
Main Methods:
- Generation of dense plasma using high-intensity lasers on a solid copper target.
- Detection and characterization of the emitted coherent far-IR radiation.
- Comparison of experimental data with theoretical radiation models.
Main Results:
- Observation of coherent far-IR radiation.
- Demonstration of a strong half-cycle-pulse nature of the radiation.
- Temporal dynamics of the radiation measured to be as fast as 150 femtoseconds (fs).
Conclusions:
- Coherent far-IR radiation is a viable emission from dense laser-driven plasmas.
- The observed radiation characteristics provide a new tool for ultrafast diagnostics.
- This technique offers a promising method for probing laser-plasma interactions in solid targets.
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