Emeritus Professor of Physics, Alf Adams is a well-known British physicist who invented the strained layer quantum-well laser, considered to be one of the top ten greatest UK scientific breakthroughs of all time. Professor Adams joined the University of Surrey in 1967. In 1986, he and his team proposed that the electronic band structure of quantum-well lasers could be significantly improved by deliberately growing the active layer in a state of strain. The resulting strained layer quantum-well laser is used in billions of optoelectronic applications, including optical fibre communications, medicine, pollution monitoring and in CDs, DVDs and supermarket checkouts. In recognition of this pioneering work, Adams was awarded the IOP’s Duddel Medal and Prize in 1995, elected a Fellow of the Royal Society in 1996, and received the Rank Prize for Optoelectronics in 2014. The Alf Adams Lecture Series was established in 2012 to showcase the University of Surrey’s ground-breaking research. Professor Adams gave the inaugural lecture, held at The Royal Society.