Scientists have found a way to achieve negative refraction—where light bends the “wrong” way—using carefully arranged atomic arrays instead of engineered metamaterials.
This breakthrough has enormous implications, potentially leading to superlenses that see beyond microscopic limits and even cloaking devices.
Breaking the Rules of Light with Atomic Arrays
For the first time, scientists have achieved negative refraction using carefully arranged atomic arrays — without relying on artificially engineered metamaterials.
For years, researchers have sought new ways to manipulate light, often pushing the boundaries of what seemed physically possible. One of the most intriguing challenges in optics is negative refraction, where light bends in the opposite direction from its usual path. This phenomenon has the potential to revolutionize technology, leading to breakthroughs like superlenses that see beyond microscopic limits and cloaking devices that make objects invisible.
Now, scientists have taken a major step forward. By precisely arranging atoms into structured arrays, they have successfully demonstrated negative refraction — without the need for complex, manufactured metamaterials.
Revolutionizing Optics with Atomic Interactions
In a study published today (February 12) in Nature Communications, Professor Janne Ruostekoski and Dr. Kyle Ballantine from Lancaster University, along with Dr. Lewis Ruks from NTT Basic Research Laboratories in Japan, unveiled a new approach to controlling how atoms and light interact.
Natural materials interact with light through atomic transitions, where electrons jump between different energy levels. However, this interaction process has significant limitations. For instance, light primarily interacts with its electric field component, leaving the magnetic field component largely unused.
Metamaterials and Their Challenges
These inherent constraints in the optical properties of natural materials have driven the development of artificially engineered metamaterials which rely on the phenomenon of negative refraction.
Refraction occurs when light changes direction as it passes, e.g., from air into water or glass. Negative refraction, however, is a counterintuitive effect where light in a medium bends in the opposite direction to what is typically observed in nature, challenging conventional understanding of how light behaves in materials.
Superlenses and Cloaking: The Future of Negative Refraction
The allure of negative refraction lies in its groundbreaking potential applications, such as creating a perfect lens capable of focusing and imaging beyond the diffraction limit or developing cloaking devices that render objects invisible.
While negative refraction has been achieved in metamaterials, practical applications at optical frequencies remain hampered by fabrication imperfections and non-radiative losses, which still severely limit applications.
The novel approach by the Lancaster and NTT team involves performing detailed, atom-by-atom simulations of light propagating through atomic arrays.
Their work demonstrates that the cooperative response of atoms can enable negative refraction, eliminating the need for metamaterials altogether.
The Power of Collective Atomic Responses
Professor Janne Ruostekoski from Lancaster University said: “In such cases, atoms interact with one another via the light field, responding collectively rather than independently. This means the response of a single atom no longer provides a simple guide to the behavior of the entire ensemble. Instead, the collective interactions give rise to emergent optical properties, such as negative refraction, which cannot be predicted by examining individual atoms in isolation.”
These effects are made possible by trapping atoms in periodic optical lattices. Optical lattices are like “egg cartons” made of light, where atoms are held in place by standing light waves.
Dr. Lewis Ruks at NTT said: “These precisely arranged atomic crystals allow researchers to control the interactions between atoms and light with extraordinary precision, paving the way for novel technologies based on negative refraction.”
A Game-Changer for Optical Technology
The collective behavior of atoms in optical lattices offers several key advantages. Unlike artificially manufactured metamaterials, atomic systems provide a pristine, clean medium free from fabrication imperfections. In such systems, light interacts with atoms in a controlled and precise manner, without the absorption losses that typically convert light into heat.
These unique properties make atomic media a promising alternative to metamaterials for practical applications of negative refraction.
Reference: “Negative refraction of light in an atomic medium” by L. Ruks, K. E. Ballantine and J. Ruostekoski, 12 February 2025, Nature Communications.
DOI: 10.1038/s41467-025-56250-w
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2 Comments
Scientists have found a way to achieve negative refraction, using carefully arranged atomic arrays instead of engineered metamaterials.
VERY GOOD!
Ask the researchers:
Do you understand the spacetime background of atomic arrays interactions?
Scientific research guided by correct theories can enable researchers to think more.
A topological vortex is a concept in physics that describes the natural gravitational field or the fluid-body coupled system. A topological vortex is formed by the interaction and balance of vortex and anti-vortex field pairs, which can be set into resonance by the body motion and interaction. A topological vortex is the foundation of the evolution of spacetime material motion.
According to the Topological Vortex Theory (TVT), spins create everything, spins shape the world. There are substantial distinctions between Topological Vortex Theory (TVT) and traditional physical theories. Grounded in the inviscid, incompressible, and isotropic spaces, TVT introduces the concept of topological phase transitions and employs topological principles to elucidate the formation and evolution of matter in the universe, as well as the impact of interactions between topological vortices and anti-vortices on spacetime dynamics and thermodynamics.
Within TVT, low-dimensional spacetime matter serves as the foundation for high-dimensional spacetime matter, and the hierarchical structure of matter and its interaction mechanisms challenge conventional macroscopic and microscopic interpretations. The conflict between Quantum Physics and Classical Physics can be attributed to their differing focuses: Quantum Physics emphasizes low-dimensional spacetime matter, whereas Classical Physics centers on high-dimensional spacetime matter.
Subatomic particles in the quantum world often defy the familiar rules of the physical world. The fact repeatedly suggests that the familiar rules of the physical world are pseudoscience. In the familiar rules of the physical world, two sets of cobalt-60 can form the mirror image of each other by rotating in opposite directions, and should receive the Nobel Prize for physics.
Please witness the grand performance of some so-called peer review publications (including PRL, PNAS, Nature, Science, etc.). https://scitechdaily.com/microscope-spacecrafts-most-precise-test-of-key-component-of-the-theory-of-general-relativity/#comment-854286. Some so-called academic publications (including PRL, PNAS, Nature, Science, etc.) are addicted to their own small circles and have deviated from science for a long time.
As the background of various material interactions and movements, space exhibits inviscid, absolutely incompressible and isotropic physical characteristics. It may form various forms of spacetime vortices through topological phase transitions. Hence, vortex phenomena are ubiquitous in cosmic space, from vortices of quantum particles and living cells to tornados and black holes. Stars and radioactive elements are one of the most active topological nodes in spacetime. Utilizing them is more valuable and meaningful than simulating them. Small or micro power topology intelligent batteries may be the direction of future energy research and development for human society.
Under the topological vortex architecture, science and pseudoscience are clear at a glance. Topological Vortex Theory (TVT) can play a crucial role in elucidating the foundations of physics, establishing its principles, and combating pseudoscience. Therefore, TVT has been strongly opposed and boycotted by traditional so-called peer review publications (such as PRL, PNAS, Nature, Science, etc.).
These so-called peer review publications (including PRL, PNAS, Nature, Science, etc.) mislead the direction of science and are known for their various absurdities and wonders. They collude together, reference each other, and use so-called Impact Factor (IF) or the Nobel Prize to deceive people around.
Ask the so-called peer review publications (including PRL, PNAS, Nature, Science, etc.):
1. What are your criteria for distinguishing science from pseudoscience?
2. Is your Impact Factor (IF) the standard for distinguishing science from pseudoscience?
3. Is the Nobel Prize the standard for distinguishing science from pseudoscience?
4. What is the most important aspect of academic publications?
5. Is the most important aspect of academic publications being flashy and impractical articles?
Pseudo academic publications (including PRL, PNAS, Nature, Science, etc.) are neither inclusivity nor openness, nor transparency and fairness, and have already had a serious negative impact on the progress of science and technology. Some so-called peer review publications (including PRL, PNAS, Nature, Science, etc.) are addicted to their own small circle and no longer know what science is. They hardly know what is dirty and ugly.
Publications that mislead the public under the guise of scholarship are more reprehensible than ordinary publications. The field of physics faces an ongoing challenge in maintaining scientific rigor and integrity in the face of pervasive pseudoscientific claims. Fighting against rampant pseudoscience, physics still has a long way to go.
While my comments may be lengthy, they are necessary to combat the proliferation of rampant pseudoscience and to promote the advancement of science and technology, and also is all I can do.
Appreciate the SciTechDaily for its inclusivity, openness, transparency, and fairness. If the researchers are truly interested in cosmic matter, please read: A Brief History of the Evolution of Cosmic Matter (https://scitechdaily.com/microscope-spacecrafts-most-precise-test-of-key-component-of-the-theory-of-general-relativity/#comment-873523).
This is the dumbest article ever. This technology has been around for millennia.