= Eli Yablonovitch
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{tag=Physicist}
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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.<Inhibited Spontaneous Emission in Solid-State Physics and Electronics by Eli Yablonovitch>[Physical Review Letters 58, 2059–2062 (1987), abstract]{ref}
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{title=Portrait of <Eli Yablonovitch>}
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