Mechanoluminescent optical fiber sensors for human-computer interaction.

Luminescent materials convert various types of energy(e.g.,light radiation,electromagnetic radiation/electric field,and mechanical stimulus)into light emissions,resulting in a multitude of luminescence processes called photoluminescence(PL),electro-luminescence(EL),and mechanoluminescence(ML)(Table S1 online).Due to the intriguing photophysical properties of these luminescent materials,they are widely developed and applied in many fields such as information security,energy harvesting,light sources and displays,infrastructure health monitoring,electronics,biomedicine,and human-computer interaction interfaces[1-3],which greatly contribute to the development of artificial intelli-gence(AI),5G communications,and the Internet of Things.