Abstract: In this talk I explain that enhancement of performance of almost any optical sensor in the end intimately connected to increasing the time of light-matter interaction, i.e. reducing the group velocity of light. Such similarly different phenomena as ENZ (epsilon near zero), plasmonics, micro-cavities, photonic crystals, EIT, (electro-magnetically induced transparency) Fano resonances, and PT (Parity-time) symmetry can all be characterized using the same slow light formalism indicating that their performances are in the end comparable.
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