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High-Field High-Repetition-Rate Sources for the Coherent THz Control of Matter.

B Green¹, S Kovalev¹, V Asgekar^2,3

¹Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstr. 400, 01328 Dresden, Germany.

Scientific Reports

|March 1, 2016

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Summary

We developed a novel terahertz (THz) light source using electron accelerators, achieving unprecedented high fields and MHz repetition rates. This breakthrough promises to revolutionize nonequilibrium matter research.

Area of Science:

Physics
Materials Science
Accelerator Physics

Background:

Ultrashort terahertz (THz) light pulses with strong fields are crucial for creating novel states of matter.
Existing laser-based sources have limitations in field strength and repetition rate.

Purpose of the Study:

To introduce a new class of THz sources based on superradiant enhancement in compact electron accelerators.
To demonstrate THz pulse generation with significantly improved field strengths and repetition rates.

Main Methods:

Utilizing superradiant enhancement of radiation from relativistic electron bunches.
Employing a compact electron accelerator.
Generating high-field THz pulses at quasi-continuous-wave repetition rates up to the MHz regime.

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Main Results:

Achieved THz pulse parameters exceeding state-of-the-art laser sources by over two orders of magnitude.
Demonstrated peak electric fields of 1 MV/cm and magnetic fields of 0.3 T at kHz repetition rates.
Successfully performed a resonant coherent THz control experiment with 10 fs resolution.

Conclusions:

The novel THz source based on electron accelerators offers unprecedented capabilities for studying light-matter interactions.
This technology is scalable and poised to revolutionize experiments in condensed matter physics and materials science.
The high fields and repetition rates enable new frontiers in ultrafast science.