Felix Bloch (1905–1983) developed a theory that describes electron waves in the periodic structure of solids.
Eli Yablonovitch (born 1946) coinvented the concept of the photonic bandgap; he made the first photonic-bandgap crystal.
Sajeev John (born 1957) invoked the notion of photon localization and coinvented the photonic-bandgap concept.
The propagation of light in homogeneous media and its reflection and refraction at the boundaries between different media are a principal concern of optics, as described in the earlier chapters of this book. Photonic devices often comprise multiple layers of different materials arranged, for example, to suppress or enhance reflectance or to alter the spectral or the polarization characteristics ...
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