Scientists from the University of the Philippines – Diliman College of Science (UPD-CS) have developed a new semiconductor structure that could lead to more affordable and reliable terahertz (THz) technology—used in applications ranging from medical imaging to high-speed wireless communication.

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Imagine a very thin rubber band morphing into a donut. This transformation, known as the ‘birth of a torus’, is used to mathematically describe the behavior of systems undergoing transitions. While the birth of a torus is common in classical systems, it has only existed theoretically in quantum systems—until now. An international team led by UP physicist Dr. Jayson Cosme has experimentally observed this phenomenon in quantum systems for the first time, using lasers, mirrors, and time crystals.