Ajay Kumar Sood FNA, FASc, FNASc, FRS, FTWAS (born 26 June 1951) is an Indian physicist, researcher and holder of 2 US and 5 Indian patents, known for his pioneering research findings on graphene and nanotechnology.
He is a Distinguished Honorary Professor of Physics at Indian Institute of Science, Bangalore.
The Government of India honoured him in 2013, with the Padma Shri, the fourth highest civilian award, for his contributions to the fields of science and technology.
Sood was elected a Fellow of the Royal Society (FRS) in 2015.