Breakthrough Nanodisk Reforms Photonic Research

Chalmers University researchers achieve a leap in nanophotonics, paving the way for highly efficient, compact optical devices.

Scientists at Chalmers University of Technology in Sweden have made a groundbreaking discovery, combining two major areas of photonics into a unique nanodisk with remarkable optical properties. This nanoobject, which is 1,000 times thinner than a human hair, holds the potential to revolutionize nonlinear optical devices by making them more efficient and compact.

Led by Professor Timur Shegai, the research team has successfully merged the fields of nonlinear and high-index nanophotonics, creating a disk-like structure that can convert light frequencies with astonishing efficiency. “We were thrilled with what we achieved,” said Dr. Georgii Zograf, the study’s lead author. The nanodisk is up to 10,000 times more efficient than the unstructured material, proving that nano structuring is key to boosting performance.

The innovation centers around the use of molybdenum disulfide, a transition metal dichalcogenide (TMD) known for its exceptional optical properties. Despite challenges in maintaining its nonlinear capabilities, the team has managed to stack the material in a way that preserves and even enhances these properties. This advancement allows the nanodisk to retain the nonlinear effects of each atomic layer, a major breakthrough.

The nanodisk also features a high refractive index, enabling it to compress light more effectively and generate doubled-frequency light. With potential applications in lasers, quantum technologies, and medical imaging, this discovery could reshape the future of photonics.