Caltech Advances Lightsail Technology for Interstellar Spacecraft
New research demonstrates precise methods to measure laser-driven forces on ultrathin membranes, a critical step toward lightsail-powered space exploration.
- Caltech researchers have developed a platform to measure the effects of laser radiation pressure on ultrathin lightsail membranes, advancing interstellar travel concepts.
- The study, published in *Nature Photonics*, tested a miniature lightsail made of silicon nitride, measuring its movements with picometer-level precision.
- The experiment overcame challenges like heat-induced vibrations from lasers, enabling accurate measurements of light's force on the sail.
- Future lightsails could propel spacecraft at speeds up to 20% of the speed of light, potentially reaching Alpha Centauri within decades, according to the Breakthrough Starshot Initiative launched in 2016.
- Researchers aim to refine the technology using nanostructures to stabilize lightsails, ensuring they remain aligned with laser beams during space travel.
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