Louis Broglie (1892-1987) was a French physicist. In his 1922 doctoral thesis he introduced the theory of electron waves. He developed this idea into what is now called Broglie hypothesis, which states that any moving particle or object has an associated wave (that is, moving matter has both particular and wave function).
In effect, Broglie united the wave and particle functions of particles. He further united the physics of light and matter by showing that the wave-particular function is applicable to all matter, not just light. For this discovery he won the Nobel Prize in Physics in 1929.
Broglie’s work has practical applications, such as his construction of electron microscopes.
Broglie contributed immensely to wave mechanics (as opposed to the probabilistic models of the behavior of particles that dominate quantum mechanics).
Louis Broglie. Researches on Quantum Theory. (1924)
Louis Broglie. Wave Mechanics. (1928)
Louis Broglie. Matter and Light. (1937)