First-of-a-kind laser spring opens up new avenues for plasma control

Key Points:

• Researchers from Lawrence Livermore National Laboratory and UC Irvine have demonstrated the first high-intensity "light spring" laser, a rotating, spring-shaped laser pulse that can twist around its central axis at controllable speeds.
• This light spring laser is created using ultra-precise freeform optics with nanostructured mirrors that imprint subtle spiral patterns, enabling the generation of laser pulses that resemble twisting strands of DNA.
• The rotating beam can drive novel helical plasma waves, potentially generating magnetic fields over 100 teslas on a tabletop-scale laser system, which could advance studies in fusion energy, astrophysics, and plasma behavior under extreme conditions.
• Light springs may improve plasma-based particle acceleration by keeping electrons within the accelerating wave longer, allowing them to reach higher energies comparable to large accelerator facilities but in much smaller setups.
• Ongoing work aims to simplify the laser design by integrating the optics into a single component, which would facilitate broader adoption and scalability of this innovative laser technology.