NTU Singapore Leads Global Team in Developing Sand-Grain-Sized Laser for 6G
An international team of scientists, led by Nanyang Technological University, Singapore (NTU Singapore), has developed a revolutionary ultracompact laser. Published in Nature Photonics in April 2025, this innovation emits light in the terahertz region, a crucial frequency for 6G communications.
The laser, smaller than a grain of sand, produces a highly focused beam with minimal divergence, ideal for precise optical applications. The team, led by NTU Singapore, addressed the common issue of light loss in compact lasers by harnessing flat bands and a phenomenon known as multi bound states in the continuum (BIC). This design confines light within the laser structure, preventing loss.
The new laser is more energy efficient and consumes less power than its counterparts. The team has filed a technical disclosure and is seeking industry collaborators to commercialize the technology. Looking ahead, researchers are working to boost the laser's power and integrate it into optoelectronic devices. Moreover, the design can be extended to create lasers emitting other wavelengths, such as near-infrared and visible light.
The ultracompact laser, a significant breakthrough in photonics, promises enhanced precision, energy efficiency, and versatility. With industry collaboration, this innovation could soon revolutionize various optoelectronic devices and 6G communication technologies.
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