Now, a team of researchers from the University of Tokyo has developed an ultrafast and energy-efficient nonvolatile switching device, described in an article published in the journal Science, that may soon be able to significantly reduce power consumption for high-energy demand. Now, a team of researchers from the University of Tokyo has developed an ultrafast and energy-efficient nonvolatile switching device, described in an article published in the journal Science, that may soon be able to significantly reduce power consumption for high-energy demand. Now, a team of researchers from the University of Tokyo has developed an ultrafast and energy-efficient nonvolatile switching device, described in an article published in the journal Science, that may soon be able to significantly reduce power consumption for high-energy demand technologies. Abstract The on-chip photonic switch is a critical building block for photonic integrated circuits (PICs) and the integration of phase change materials (PCMs) enables non-volatile switch designs that are compact, low-loss, and energy-efficient. Existing switch designs based on these materials. Optical switching technology has emerged as a cornerstone of modern telecommunications infrastructure, fundamentally transforming how data is transmitted across networks. Traditional Electrical Packet‐Switch (EPS) fabrics increasingly struggle with congestion, power consumption, and scalability constraints as. Researchers have developed a high-speed electro-optic switch that is energy-efficient, has low crosstalk and works across a broad bandwidth. Prototypes are used to outline a path towards traffic outage times equal to or faster than type-B protection. © 2026 The Author (s) View More. We leverage optical switching in PON.