New Research Could Shape the Next Generation of Space Sails

Key Takeaways

• Metajets use patterned surfaces to turn light into sideways thrust and lift.
• The nearest space use is advanced sail material research, not flight hardware.
• NASA solar sail work shows why lighter, smarter optical surfaces matter.

Why Optical Propulsion and Levitation of Metajets Matters to the Space Industry

On March 30, 2026, Cell Press posted the study Optical Propulsion and Levitation of Metajets as an in-press corrected proof in Newton. The research describes a small device that moves when light shines on it, because its surface is patterned to send the light away at a chosen angle. In simple terms, optical propulsion and levitation of metajets shows how a tiny engineered surface can turn light into both sideways motion and lift.

The study matters to the space industry because spacecraft already use light pressure in solar sailing. Sunlight carries momentum. A reflective sail can receive a gentle push from that momentum without burning fuel after deployment. That push is extremely small, so sail missions need very light materials, large surface areas, and careful control of orientation. Metajets bring a different idea into the conversation: the surface receiving the light can be engineered so that it controls the direction of the push.

A metajet is not a spacecraft. The devices in the study are microscale objects tested in a liquid cell, not large flight structures operating in vacuum. That difference matters. The value for space comes from the physics and materials approach, not from the size of the laboratory object. The study suggests that patterned optical surfaces may help future sails, beam-riding spacecraft, or small photonic devices manage how light produces force.

The space industry already has active interest in propellantless propulsion. NASA’s Advanced Composite Solar Sail System launched on April 23, 2024, and NASA lists the mission as active as of 2026. The mission tests lightweight composite booms and a deployable sail from a CubeSat. Its sail is about 9 meters on a side, and NASA explains that solar radiation pressure is small, so a sail must be large to generate useful thrust. Metajet research speaks to the same problem from the opposite direction: instead of starting with the full spacecraft, it starts with the optical behavior of the surface.

The space relevance is best understood through three questions. Can a surface be made light enough? Can it survive strong illumination? Can it control the direction of force without complicated moving parts? The metajet study gives one experimental answer at a very small scale. It shows that surface geometry can shape the force created by light.

How a Metajet Moves Without Fuel

A metajet moves because light carries momentum. A person does not feel a push from ordinary room light because the force is tiny. At small scales, or across very large and light surfaces in space, that tiny push becomes measurable. A solar sail works from this same principle. A sail reflects sunlight and receives a small push in return.

The metajet adds a patterned surface to the idea. Its surface contains silicon nanopillars arranged in repeating patterns. Those pillars are far smaller than objects people can see without special instruments. The pattern changes the path of incoming light, sending it away at an engineered angle. When the light changes direction, the object receives a reaction force in the opposite direction.

The study describes these patterned surfaces as metasurfaces. A metasurface can be thought of as a flat optical device that controls light using tiny structures rather than curved glass. Ordinary lenses bend light because of their shape and material. Metasurfaces can bend, split, redirect, or shape light because each small feature changes how the light wave behaves.

The metajet experiment used silicon nanopillars on a silicon dioxide base. The paper reports pillars 500 nanometers tall, a silicon dioxide base 100 nanometers thick, and a repeated pitch of 450 nanometers. A nanometer is one billionth of a meter. These measurements are much smaller than a human hair, which is why the device belongs to nanophotonics, the field that studies how light interacts with structures at extremely small scales.

The easiest way to picture the device is to imagine a tiny raft covered with microscopic posts. A beam of light hits the raft from below. The posts are arranged so the outgoing light leaves at an angle rather than traveling straight through. The raft then receives a push in the opposite direction and can move sideways. Some of the light behavior also produces lift, so the device can rise.

The result is different from a rocket. A rocket throws mass backward to move forward. A metajet redirects light and gains motion from the change in photon momentum. That makes it relevant to spacecraft concepts that seek propulsion without carrying large amounts of propellant.

What the Laboratory Experiment Actually Showed

The attached study did not test a sail in space. It tested tiny metajets in water under a laser beam. That setup gave researchers a controlled way to observe motion and measure whether the device behaved as predicted. The researchers reported both sideways movement and upward movement when the metajet received light from below.

One device configuration produced 58% refraction intensity and moved at about 4.75 micrometers per second. A micrometer is one millionth of a meter. Another configuration, using a three-pillar supercell, produced about 78% refraction efficiency and moved at about 7 micrometers per second. These speeds are slow by everyday standards, but speed was not the main point. The important result was that changing the surface pattern changed the motion in a measured and repeatable way.

The study compared supercells with three to eight pillars. A supercell is a repeated group of tiny surface features. Fewer pillars in the supercell produced a stronger phase gradient, which changed the angle of the outgoing light. The three-pillar design produced the highest reported refraction efficiency and the fastest reported motion in the experiment.

The metajet also rose in the vertical direction. The study’s motion measurements showed movement along the x axis and z axis, with little movement along the y axis. The vertical movement eventually stopped because the sample cell had an upper boundary. That detail keeps the result grounded: the metajet did not fly freely through open space. It moved inside a bounded laboratory container.

Researchers also used computer modeling to estimate the forces acting on the device. The study mentions the Maxwell stress tensor, which is a mathematical tool used to calculate electromagnetic force. For a non-specialist, the takeaway is simpler: the team compared real motion with calculations about how light should push the surface, and the two lines of evidence supported the same physical picture.

The most space-relevant point is the relationship between surface design and force direction. Conventional solar sails depend heavily on how the whole sail is tilted toward the Sun. A patterned sail surface could, in principle, help redirect light in more controlled ways. That idea needs many more steps before it belongs on a spacecraft, but the metajet paper gives a small-scale demonstration of the underlying behavior.

Why Space Companies Care About Surfaces That Control Light

Spacecraft design often treats surfaces as structural or thermal components. Solar panels collect energy. Radiators reject heat. Reflective coatings manage temperature. Antennas send and receive radio waves. Solar sails make surface behavior part of propulsion. Metajet research takes the surface idea further by showing how tiny patterns can control how light pushes matter.

For space companies, surface engineering has practical business value because mass is expensive. Every gram assigned to propellant, tanks, valves, and thrusters competes with payload mass. Propellantless systems cannot replace chemical engines for launch, but they can extend mission life or open mission profiles after a spacecraft reaches space. NASA describes solar sails as a way to move without conventional rocket propellant after deployment, which makes them attractive for long-duration missions that can accept low continuous thrust.

The LightSail 2 mission gives a public example. The Planetary Society announced that LightSail 2 reentered on November 17, 2022, after nearly three and a half years in orbit. The mission demonstrated that a small spacecraft could change its orbit using sunlight. It did not need a chemical engine for the solar-sailing demonstration.

NASA’s ACS3 mission focuses on another important part of the same industry problem: deployment. A sail may be thin, but it still needs booms or other structures to hold its shape. NASA says ACS3 uses composite booms made from flexible polymer and carbon fiber materials. The space industry needs the sail surface and the support structure to work together, because a sail that wrinkles, twists, or tears will lose performance.

Metajet-like surfaces would add a new layer of complexity. They would need to be extremely light, highly uniform, and resistant to heat. They would also need to maintain optical performance after launch vibration, temperature swings, radiation exposure, and long storage before deployment. Those requirements are standard concerns for space hardware, but patterned optical surfaces may make them harder to meet.

The commercial upside is still speculative, but the use cases are identifiable. Space companies may eventually examine engineered optical surfaces for smallsat station-keeping, deep-space CubeSats, solar observatories, space-weather monitors, or beam-riding probes. They may also apply related techniques inside spacecraft instruments, where microscale motion and light control can support sensing or calibration.

Solar Sails Provide the Nearest Space Industry Pathway

Solar sails offer the most natural path for translating metajet ideas into space applications. A sail already uses photon momentum, so a patterned optical surface fits the same physical category. The difference is that most solar sails use reflective films, and metajet research uses engineered structures that redirect light with more detailed control.

NASA’s ACS3 page states that solar sails use the pressure of sunlight for propulsion, eliminating the need for conventional rocket propellant. NASA also says the unfurled ACS3 sail is about 30 feet, or about 9 meters, on a side. Since solar radiation pressure is small, large sail areas are required to generate useful thrust.

A patterned sail surface could matter because spacecraft need steering, stability, and attitude control. A flat mirror-like sail can generate force, but the direction of that force depends on sail orientation. A surface that redirects light through engineered patterns might give mission designers another control method. It could shift force slightly without requiring large mechanical movements, depending on the final material design.

NASA has already studied optical surface ideas beyond ordinary reflection. Its diffractive lightsails and diffractive solar sailing concepts examine sails that use transmitted or diffracted light rather than simple reflection. These NASA Innovative Advanced Concepts studies relate closely to the metajet paper because both rely on controlled light redirection rather than treating a sail as a simple mirror.

The space industry also watches concepts for laser-driven sails. Breakthrough Starshot studies very small spacecraft pushed by powerful ground-based lasers toward another star system. Such concepts face enormous technical barriers, including sail materials, laser infrastructure, pointing accuracy, communications, and survival at extreme acceleration. Metajet research does not solve those barriers, but it belongs to the broader scientific effort to design matter that responds to light in planned ways.

Microgravity Testing Could Turn a Lab Result Into a Space-Relevant Result

The metajet work becomes more valuable to the space industry if the same behavior can be tested in microgravity. On Earth, gravity, fluid drag, nearby surfaces, and the sample cell can all shape what researchers see. A microgravity test would help determine how much of the movement comes from light-driven force alone.

Public coverage of the research reported that Shoufeng Lan’s team at Texas A&M University is seeking support for microgravity experiments. Such tests could take place during parabolic aircraft flights, suborbital flights, space station experiments, or small free-flyer demonstrations. Each step would remove some Earth-based interference and add more realistic operating conditions.

A useful test campaign would likely begin small. Researchers could first test metajets in reduced gravity to observe whether the vertical component behaves as predicted. Later tests could move from liquids toward gas, vacuum, and free-space conditions. Space-relevant testing would need careful measurement of temperature, orientation, beam alignment, and motion over time.

The International Space Station could provide one possible research environment, though no such metajet experiment had been announced as of April 2026. The station has long supported microgravity materials and fluid experiments. A small optical-force test could fit that pattern if it met safety, power, containment, and research value requirements.

Suborbital providers may offer another route. Short periods of microgravity can support early proof tests before researchers seek orbital opportunities. For a technology at this stage, the goal would not be a working sail. The goal would be to prove that engineered optical surfaces create predictable force without relying on the details of a liquid cell.

Vacuum testing would then become essential. Space is not a water cell. A spacecraft sail must work without fluid support, under thermal cycling, and under long exposure to sunlight or laser illumination. Metajets offer a physics result; space qualification would require a much broader engineering program.

Near-Term Uses May Come Before Spacecraft Propulsion

The first practical uses may come in laboratories rather than in orbit. Metajets could help researchers move tiny objects without touching them. That matters for microfluidics, small sensors, and experiments that need careful control of particles or devices in liquid.

Light-driven micromachines already exist as a research category. A 2022 Nature Nanotechnology paper on light-driven microdrones showed micrometer-scale devices in water that could move under light. A 2025 Nature Communicationspaper on a plasmonic microrobot described a light-driven microrobot able to trap and transport a nanoscale fluorescent diamond. These works show that optical motion control has value even before space applications enter the picture.

For the space industry, laboratory uses still matter. Space hardware depends on materials testing, sensors, optics, and precision instruments. Small light-driven devices may support test equipment, optical calibration, or small actuators inside research payloads. A device does not have to push a spacecraft to have space-sector value.

Metajet concepts may also help train the next generation of space engineers. The research connects Newtonian motion, optics, nanofabrication, and propulsion physics in one experiment. That combination maps well onto spacecraft engineering, where designers often need to understand how small surface choices affect large mission outcomes.

Commercial adoption would require repeatability. A company needs surfaces that can be manufactured at scale, inspected reliably, and integrated into systems without unpredictable behavior. Metajet research is far from that stage, but it supplies a testable design principle: the surface pattern can be a force-control mechanism.

Barriers Between Metajets and Space Hardware

The first barrier is scale. A metajet is tiny. A useful solar sail may need tens, hundreds, or thousands of square meters depending on mission design. NASA’s Solar Cruiser concept described a 1,653 square meter sail to demonstrate new science mission capabilities. Turning a nanopatterned surface into something that large would require manufacturing methods far beyond single research devices.

The second barrier is mass. Patterned optical surfaces must remain extremely light. Adding complex surface structures can improve optical control, but each material layer can add mass or manufacturing burden. In sail propulsion, mass per unit area is a core design factor because the push from light is so small.

The third barrier is heat. Any light that a surface absorbs becomes heat. A metajet experiment under a laboratory laser can control power, exposure, and surrounding medium. A solar sail or laser sail must survive large energy flows, temperature swings, and long mission durations. Materials must keep their optical behavior during those conditions.

The fourth barrier is pointing. A space sail must hold orientation with high precision. A laser-driven sail would need even tighter beam alignment because the energy source is directed from far away. A patterned surface that redirects light could help control force, but it could also make the spacecraft more sensitive to tiny errors in angle or shape.

The fifth barrier is verification. Space companies and agencies need tests that show a design works under flight conditions. For a metajet-inspired sail, that means vacuum chambers, vibration tests, thermal cycling, radiation exposure, deployment trials, and eventually flight demonstration. The path from a small laboratory device to qualified space hardware is long and expensive.

These barriers do not reduce the scientific value of the study. They define the distance between discovery and application. The space industry pays attention to early physics when it suggests a new way to lower mass, reduce propellant, improve pointing, or extend mission life.

Space Market Segments That Could Benefit From Better Light-Control Surfaces

Deep-space science missions could benefit from better sail control. Solar sails can produce continuous low thrust without propellant, which can help spacecraft reach or hold unusual observation points. NASA has discussed solar sailing for space-weather monitoring and heliophysics missions because sails can support vantage points that are hard to maintain with conventional propulsion.

Small satellite operators may also benefit if light-control surfaces become practical. Very small spacecraft have limited room for propellant. A deployable surface that supports gentle station-keeping, drag management, or orbit adjustment could extend mission options. Near-Earth missions would still face atmospheric drag, operational constraints, and licensing requirements, so any benefit would depend on orbit and mission design.

Space-weather services form another candidate market. NASA’s ACS3 material states that future larger composite sail systems could support space-weather early warning satellites. Space-weather monitoring has economic value because solar storms can affect satellites, communications, navigation, and electrical infrastructure. A sail that can hold a useful solar-observation position with less propellant could support this service category.

Asteroid reconnaissance missions could also fit the sail model. NASA’s ACS3 material identifies near-Earth asteroid reconnaissance as one possible future use for larger solar sail systems. Small spacecraft using light-driven propulsion could make long-duration missions cheaper if their payload requirements and travel times match sail capabilities.

Interstellar precursor missions remain speculative but relevant for research direction. NASA’s Extreme Metamaterial Solar Sails study examined ultrathin metamaterial sail architectures for high-speed missions. That work shows official interest in surfaces engineered at the material level, which makes the metajet result part of a broader research pattern rather than an isolated laboratory result.

The strongest near-term commercial connection may sit in materials and components, not full spacecraft. Companies that work in nanofabrication, optical coatings, thin films, photonics, CubeSat structures, or precision metrology could treat this research as a signal that force-shaping surfaces may become useful over time. The business case would depend on manufacturing cost, performance advantage, and mission demand.

Summary

The optical propulsion and levitation of metajets study shows that light-driven motion can be shaped by the object’s surface design. The researchers patterned tiny silicon structures so incoming light left at controlled angles. The device then moved sideways and upward because the outgoing light carried momentum in directions set by that pattern.

For space industry readers, the result belongs in the same family as solar sails, diffractive sails, and laser-sail concepts. It does not place a new spacecraft design on the near-term market. It does show how a surface could help control the direction of force from light, and that idea matters for future sails, beam-riding probes, and small optical devices used in space systems.

The research also gives the space sector a useful reminder: propulsion is not always a matter of engines and propellant. In some mission classes, the shape, mass, reflectivity, and optical response of a surface can become part of the propulsion system. Metajets demonstrate that principle at microscale, and the next tests will determine whether it can grow into a space-relevant materials platform.

Appendix: Top Questions Answered in This Article

What Is a Metajet?

A metajet is a tiny engineered vehicle that moves when light shines on it. Its surface contains small patterned features that redirect light at chosen angles. That redirected light changes photon momentum, and the device receives a reaction force that can push it sideways and lift it upward.

Why Is This Research Relevant to Space?

Spacecraft can use light pressure for propulsion through solar sails. Metajets show that a patterned surface can shape the direction of that light pressure. The research may help future work on smarter sail materials, beam-riding probes, and optical force control for small spacecraft systems.

Did the Study Test a Spacecraft?

No. The study tested micron-scale devices in a laboratory liquid cell. The devices were not spacecraft, and they were not tested in orbit. The space relevance comes from the physics of photon momentum and the possibility of applying engineered optical surfaces to future sail concepts.

How Is a Metajet Different From a Solar Sail?

A solar sail is a large surface that uses sunlight pressure to move a spacecraft. A metajet is a tiny device that uses a patterned surface to redirect light and move in controlled directions. Both depend on photon momentum, but they operate at very different scales.

What Did the Researchers Measure?

The researchers measured how different surface patterns affected light redirection and device motion. One configuration reached about 78% refraction efficiency and about 7 micrometers per second of movement. The experiment also showed both sideways propulsion and vertical lift.

Why Does Surface Patterning Matter?

Surface patterning matters because it controls how light leaves the device. When outgoing light is steered at an angle, the device receives a reaction force in another direction. This could help future optical sails or tiny spacecraft components control force without large mechanical parts.

Could Metajets Replace Rockets?

No. Rockets provide high thrust for launch and fast maneuvers. Metajets and solar sails deal with very small forces from light. Their possible value is in long-duration, low-thrust missions after launch, or in small optical systems where contactless motion is useful.

What Must Happen Before Space Use?

Researchers need to test similar force behavior in microgravity, vacuum, and higher-power light environments. Engineers would also need large-area manufacturing, thermal control, deployment methods, and reliable optical performance. Space use requires much more validation than a laboratory demonstration.

What Space Missions Could Benefit From Light-Control Surfaces?

Potential mission areas include solar-sail science missions, space-weather monitoring, asteroid reconnaissance, and laser-sail research. These uses depend on low-mass surfaces that can manage photon momentum efficiently. The strongest early link is materials research rather than immediate spacecraft products.

Why Is Microgravity Testing Important?

Microgravity testing would reduce the influence of Earth’s weight on the experiment. It would help researchers see whether the metajet’s light-driven forces behave as predicted when gravity is not dominating the motion. That would make the results more relevant to spacecraft environments.

Appendix: Glossary of Key Terms

Metajet

Built from a patterned optical surface, this tiny vehicle moves when light shines on it. In the study, the device used silicon nanopillars to redirect light and create sideways motion plus upward lift inside a laboratory liquid cell.

Metasurface

Made from tiny engineered features, this flat surface controls how light behaves. The features can redirect, bend, or reshape light without needing the curved glass used in ordinary lenses.

Photon Momentum

Light carries momentum even though photons have no rest mass. When light reflects, bends, or passes through a surface at a new angle, that momentum change can push the object receiving the light.

Solar Sail

Designed as a large, lightweight reflective surface, this spacecraft technology uses sunlight pressure for propulsion after launch. It offers continuous low thrust without needing conventional rocket propellant for the sailing phase.

Phase Gradient

Created by a surface pattern that changes a light wave step by step, this feature helps steer outgoing light. In metajets, the phase gradient comes from repeated nanopillar groups across the surface.

Refraction

Describing the bending of light as it passes through a material or surface, this optical effect helps explain how metajets send outgoing light away at an engineered angle.

Supercell

Formed from a repeating group of nanopillars, this design unit shapes how the metasurface changes light. The study tested supercells with three to eight pillars to compare motion and light redirection.

Microgravity

Found in orbiting spacecraft or free-fall test environments, this condition greatly reduces the apparent effect of weight. It would help researchers test light-driven motion with fewer Earth-based complications.

Diffractive Sail

Designed to redirect light through diffraction rather than ordinary mirror-like reflection, this sail concept may offer new control options for solar sailing and related spacecraft mission designs.

Laser Sail

Powered by a directed laser beam rather than sunlight alone, this proposed propulsion method could push very small spacecraft to high speeds. It requires advanced sail materials, precise beam pointing, and strong thermal control.