Title: Harvesting the Sun’s Power: A Breakthrough in Solar-Powered Lasers
In a significant step towards realtà, an international team of researchers has received a €4 million ($1.2 million) grant from the European Innovation Council (EIC) and Innovate UK to develop game-changing solar-powered laser technology inspired by bacteria.
This innovative project aims to power lunar bases, interplanetary missions, and contribute to sustainable energy solutions on Earth. The technology could revolutionize space exploration by providing a lightweight, efficient power source for distant locations.
Light from the Deep
The inspiration for this groundbreaking technology comes from the depths of the ocean. Certain bacteria thrive in the extreme darkness of the deep sea, capable of performing photosynthesis with remarkably little light. Their secret lies in highly efficient light-harvesting structures, which the team aims to replicate and integrate into their laser system.
"Our group spends a lot of time thinking about how we can harvest light artificially and what we can learn from nature," said Erik Gauger, a quantum theorist at Heriot-Watt University in Scotland, involved in the collaboration. "If it’s possible naturally, we should be able to mimic the effect in a man-made system."
A Brief History of Solar-Powered Lasers
Solar-powered lasers are not a new concept. The first was demonstrated in 1963, just three years after the invention of the laser itself. However, normal sunlight is too diffuse to effectively power a laser. Current solar lasers require complex and heavy optics to concentrate sunlight by at least a thousand times, making them challenging to launch into space.
Bacteria to the Rescue
To overcome this challenge, Gauger and his team plan to harness the light-harvesting structures of deep-sea bacteria. These structures are incredibly sensitive, allowing the bacteria to capture nearly every photon they encounter. By extracting and replicating these structures in the lab, the team hopes to focus sunlight to drive their laser system.
Powering the Final Frontier
The team’s proposed system works by capturing incoming sunlight and channeling it into a solid material, such as glass. Electrons within the material’s atoms absorb the light’s energy and then release it as a concentrated laser beam.
With the new grant, the team aims to develop a new laser gain material that can interact with the bacterial light-harvesting structures. Once the system is up and running, it could potentially power satellites, lunar bases, and even missions to Mars. Due to their narrow, focused reach, solar lasers could transmit energy over vast distances. For instance, a solar laser stationed in space could supply power to a lunar base or even back to Earth.
Moreover, solar lasers could contribute to the global shift towards renewable energy on Earth. They could help drive chemical processes that require significant energy, such as water splitting, chemical synthesis, and fertilizer production.
The team plans to develop a prototype within the next three years, bringing us one step closer to a future powered by sunlight.
