Researchers from the Netherlands Institute for Atomic and Molecular Physics, Delft University of Technology, and Cornell University in the USA have developed a revolutionary optical focusing technology that can trap light beams in a tiny space comparable to their own wavelength. This method takes advantage of the special properties of photonic crystals, has a wider applicable wavelength range, and can create extremely high-intensity localized optical fields, potentially leading to breakthroughs in fields such as photonic chips and Quantum Communication. The related paper has been published in the latest issue of 'Science Advances'.