Eli Yablonovitch is a prominent physicist known for his significant contributions to the fields of optics and materials science. He is particularly recognized for his work on photonic band gaps and the development of photonic crystals, which are materials engineered to create specific optical properties. His work has implications for various technologies, including telecommunications, renewable energy, and advanced imaging systems.
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Eli Yablonovitch proposed using a three-dimensional periodic dielectric to inhibit spontaneous emission. If an electronic transition lies inside a complete photonic band gap, the surrounding material supplies no propagating electromagnetic modes at that frequency. The proposal therefore treats spontaneous emission as a process controlled by both the emitter and its electromagnetic environment. It motivated engineering photonic crystals to control light and to reduce unwanted radiative processes; a complete gap is a stronger condition than blocking propagation in only one direction.[ref]
Portrait of Eli Yablonovitch
. Stimmy88. CC BY-SA 3.0, via Wikimedia Commons. Source.