Tight-binding photonic bands in metallophotonic waveguide networks and flat bands in kagome lattices

Shimpei Endo, Takashi Oka, Hideo Aoki

Research output: Contribution to journalArticleResearchpeer-review

32 Citations (Scopus)


We propose that we can realize "tight-binding photonic bands" in metallophotonic waveguide networks, where the photonic bound states localized around the crossings of a network form a tight-binding band. The formation of bound states at the crossings is distinct from the conventional bound states at defects or virtual bound states in photonic crystals, but comes from a photonic counterpart of the zero-point states in wave mechanics. Model calculations show that the low-lying photon dispersions are indeed described accurately by the tight-binding model. To exemplify how we can exploit the tight-binding analogy for designing of photonic bands, we propose a "flat photonic band" in the kagome network, in which the photonic flat band is shown to arise with group velocities that can be as small as 1/1000 times the velocity of light in vacuum.
Original languageEnglish
Article number113104
Pages (from-to)1-4
Number of pages4
JournalPhysical Review B
Issue number11
Publication statusPublished - 17 Mar 2010
Externally publishedYes

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