Victor Veselago
Victor Georgievich Veselago (13 June 1929 – 15 September 2018) was a Russian physicist. In 1967, he was the first to publish a theoretical analysis of materials with negative permittivity, ε, and permeability μ. He published his work in a paper entitled "''The Electrodynamics of Substances with Simultaneously Negative Values of ε and μ".