pulses
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Science
Researchers develop a laser that produces the most powerful ultrashort laser pulses ever
Overall system overview: A laser appears in the center of the image, and in the foreground are lenses and mirrors that reflect and redirect the laser beam. Credit: Moritz Seidel / ETH Zurich The word laser usually conjures up images of a continuous, intensely focused beam of light. Lasers that produce such light are actually quite common and useful. However,…
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Physics
Direct generation of spin current using ultrashort laser pulses
Experimental schematic and static characteristics. Source: Physical Review Letters (2024). DOI: 10.1103/PhysRevLett.133.106902 An international team of physicists has discovered that they can directly generate spin current using a specific type of ultrashort laser pulse. In a study published in the journal Physical Review Letters, the team generated the spin current using linearly polarized laser pulses and a circularly polarized probe…
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Physics
Researchers use terahertz light pulses to uncover superconducting disorders
In the cuprate superconductor La1.83Sr0.17CuO4, interlayer tunneling inherits spatial disorder, which can be measured using isolated Josephson echoes in angle-resolved two-dimensional terahertz spectroscopy. Credit: Jörg Harms, MPSD A team of researchers from the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) in Hamburg, Germany, and Brookhaven National Laboratory in the United States has demonstrated a new way…
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