Is Darkness Faster than Light? A Revolutionary Experiment from Technion
In a stunning breakthrough that challenges our traditional understanding of wave dynamics, researchers at the Technion-Israel Institute of Technology have successfully measured the velocity of dark points—known as optical vortices—within light waves. These “dark points” are not just curiosities; they are phase singularities where the wave amplitude drops to zero, effectively points of complete darkness embedded in the light field. Remarkably, these vortices have been observed moving faster than the speed of light, confirming predictions first made over 50 years ago.
Driven by a collaboration of leading scientists from multiple top universities—including the Technion, Bar-Ilan University, MIT, Harvard, and Stanford—this research, published in Nature, pushes the envelope of electron microscopy and optical physics. The team harnessed advanced electron interferometry combined with innovative opto-mechanical systems to achieve unprecedented temporal and spatial resolution. This allowed them to peer into the elusive microcosm where light’s dark points move with previously unmeasurable speed and precision.
Optical vortices represent phase singularities within a wavefront. Analogous to whirlpools in fluids or vortices in air currents, these singular points are characterized by a complete null in intensity, making them invisible in conventional imaging. What makes them fascinating is their dynamical behavior within the wave: theoretically, these vortices can propagate at speeds exceeding their surrounding waves. This seemingly paradoxical prediction from the 1970s defies common intuition but remains consistent with fundamental physical laws.
Einstein’s theory of relativity establishes that nothing can travel faster than light through a vacuum, as this is the cosmic speed limit for objects carrying mass or transmitting information. However, the phase singularities measured in this experiment are massless entities that do not convey energy or information, thus sidestepping the constraints set by relativity. They serve as fascinating wave interference phenomena where superluminal velocities are possible without contradicting physics principles.
To experimentally observe these phenomena, the researchers turned to hexagonal boron nitride (hBN), a unique material where visible light couples with lattice vibrations, producing hybrid light-sound waves called polaritons. Polaritons propagate dramatically slower—around 100 times slower—than light in vacuum, creating an environment where the behavior of vortices can be magnified and studied in detail. Within these slow-moving waves, the optical vortices were observed leaping ahead, virtually surpassing light’s speed as it traverses through this constrained medium.
The experimental setup itself was a marvel of precision engineering. By integrating a finely tuned laser system with an electron microscope outfitted with state-of-the-art opto-mechanical components, the team succeeded in simultaneously capturing the spatial structure and rapid temporal evolution of these vortices. This synergy of technologies allowed them to transform theoretical predictions into tangible measurements at the nanoscale, revealing unprecedented details about light’s complex morphology.
Professor Ido Kaminer, leading the Technion research team, emphasized that these discoveries extend beyond optics. They reflect universal laws governing wave phenomena across fields—from acoustics and fluid dynamics to more complex quantum systems like superconductors. The breakthrough provides a novel diagnostic tool for exploring the swiftest and most subtle processes at the nanoscale, potentially revolutionizing microscopy techniques and the study of transient physical phenomena.
This pioneering work opens new horizons for various scientific disciplines. The ability to track these nanoscale superluminal motions could redefine approaches in nanophotonics, quantum information storage, and superconductivity research. Scientists anticipate that electron interferometry-based microscopy, capable of visualizing these rapid “dances” of dark points, will illuminate hidden mechanisms in chemistry and biology, fundamentally altering how we understand nature’s fastest processes.
Furthermore, the study’s implications touch on the essential mechanisms underpinning wave interference, phase singularities, and their role in encoding information within complex systems. By revealing how these singularities behave, the findings offer potential pathways to manipulating wave phenomena at a fundamental level, perhaps enabling new methods to control light-matter interactions and quantum correlations.
Combining theoretical insights with experimental finesse, the team’s work also relied on novel material preparation methods by collaborators such as Prof. Hanan Herzig Sheinfux from Bar-Ilan University. Their meticulous crafting of hBN samples allowed the controlled environment necessary for the observations. The international nature of the collaboration underscores the interconnectedness of modern scientific advances, pooling diverse expertise to tackle one of physics’ subtle frontiers.
The project received significant funding support from the European Union’s Horizon 2020 program, as well as foundations dedicated to advancing quantum research, ensuring the robust development of the experimental systems. This support was crucial for building the precise instrumentation and conducting the extensive data analysis required to validate superluminal motion of phase singularities.
In sum, this discovery confirms a long-standing theoretical prediction that dark points within light waves can exceed the speed of light in specific media without violating Einsteinian constraints. This remarkable confluence of wave physics, materials science, and advanced experimental techniques not only deepens our understanding of light’s fundamental nature but also propels forward the frontier of microscopic imaging and quantum information science.
Subject of Research: Not applicable
Article Title: Superluminal correlations in ensembles of optical phase singularities
News Publication Date: 25-Mar-2026
Web References: https://doi.org/10.1038/s41586-026-10209-z
Keywords
Physics, Nanotechnology, Optics, Electron Microscopy, Optical Vortices, Phase Singularities, Polaritons, Superluminal Motion, Wave Interference, Quantum Information, Light-Matter Interaction, Advanced Microscopy
