Generating ultrafast laser pulses at the nanoscale can provide a key component for optical interconnection in multi-core computer processors. It can significantly reduce the energy consumption for converting electrical signals into optical forms at high bandwidth, which is essential for future applications in the Internet of Things and Green Photonics. However, experimental approaches to generate ultrafast laser pulses at the nanoscale are yet to be explored. Based on Dr Jin's expertise in ultrafast photonics, he will develop a novel technology to generate laser pulses through the dynamic control of Purcell factor in coupled photonic crystal cavities. This technology is not fundamentally limited by the spontaneous emission lifetime and can thus achieve high speed modulation beyond 100GHz, ten times faster than conventional technologies. Dr Jin's research and industry track record, combined with the excellent laboratory environment at the University of Sheffield, will support the success of this timely and important research topic.