Crossing of manifolds leads to flat dispersion: Blazed Littrow waveguides

Journal Article · Thu Dec 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.063825· OSTI ID:22095714

Benisty, H.; Khayam, O. ^[1]; Piskunov, N. ^[1]; Kashkarov, P. K. ^[2]

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1. Laboratoire Charles Fabry, Institut d'Optique, Universite Paris-Sud, CNRS, FR-91127 Palaiseau (France)
2. Faculty of Physics, M. V. Lomonosov Moscow State University, Moscow, 119991 (Russian Federation)

We display a photonic embodiment of the Demkov-Ostrovsky solution to the crossing of two manifolds made of equidistant modes thanks to broad periodic waveguides. We find clearly narrowing resonances that signal the singular, flat dispersion case that we had termed ''critical coupling.'' The reconciliation of band-edge confinement and cavity confinement, two pillars of photonics, appear from the guide length dependence of spectra. We suggest the generality of the Demkov-Ostrovsky or critical coupling flat dispersion across all kinds of waves, e.g., electronic and acoustic.

• OSTI ID: 22095714
• Journal Information: Physical Review. A, Vol. 84, Issue 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
CAVITY RESONATORS
CONFINEMENT
COUPLING
ELECTROMAGNETIC RADIATION
LENGTH
MATHEMATICAL SOLUTIONS
PERIODICITY
PHOTONS
RESONANCE
WAVEGUIDES