Wallace C. H. Choy is a full professor in the Department of EEE, HKU. His research interests cover organic/inorganic photonics and photovoltaics devices, plasmonic structures, metal oxides, and nanomaterial devices. He has published more than 220 peer-reviewed papers, several book chapters, patents, and edited one book. He was recognized as top 1% of most-cited scientists in Thomson Reuter’s Essential Science Indicators from 2014 to 2019. He is named as one of the "Highly Cited Researchers" by Clarivate Analytics in 2018. He is an elected fellow of OSA.