Smaller than the wavelength of light it emits, this tiny silicon LED could mean a big breakthrough for microscopy and more. A research team from the Singapore-MIT Alliance for Research and Technology (SMART) claim to have built the "world's smallest LED" — and say the technology could be used to turn smartphone cameras into high-resolution microscopes in the future. "Our breakthrough represents a proof of concept that could be hugely impactful for numerous applications requiring the use of micro-LEDs," claims Iksung Kang, resear...