An international team of scientists has discovered that the material arsenic trisulfide (As2S3) possesses novel optical properties, behaving like a 'photosensitive clay' that can be precisely shaped using a simple laser. The research was conducted by scientists from the XPANCEO Emerging Technologies Research Center in collaboration with Nobel Laureate Professor Sir Konstantin Novoselov of the University of Manchester and the National University of Singapore.
The study, published in the journal Nature Communications, demonstrates that a low-power laser can directly pattern and reconfigure As2S3 at the nanoscale. This process alters the material's optical properties, such as its refractive index, without damaging its structure. This capability is a significant advancement for creating ultra-compact, reconfigurable optical devices.
Arsenic trisulfide is a chalcogenide glass known for its high transparency in the infrared spectrum. The new research shows its potential for applications in next-generation photonic circuits, dynamic optical metasurfaces, and on-chip sensors. The laser-based technique offers a simpler and more flexible alternative to complex traditional nanofabrication methods.
Professor Novoselov, renowned for his Nobel Prize-winning work on graphene, contributed to the exploration of this material's unique photoresponse. The findings open a pathway for developing adaptive optical components that can be tuned after manufacture, which is crucial for advancing fields like telecommunications, optical computing, and biomedical imaging.
