TY - GEN
T1 - Waveguide stopped light mediated by mode transitions
AU - Pujol-Closa, Pilar
AU - Gomis-Bresco, Jordi
AU - Sebastián Gómez-Díaz, J.
AU - Artigas, David
N1 - Publisher Copyright:
© 2019 IEEE
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2019
Y1 - 2019
N2 - Hyperbolic metamaterials (HMMs) are uniaxial materials that have hyperbolic dispersion curves. There are two types of hyperbolic metamaterials, type I that is described by a permittivity tensor with ε|| < 0 and ε⊥ > 0, and type II that has ε|| > 0 and ε⊥ < 0. Planar waveguides with hyperbolic materials have been mostly studied with propagation direction along the principal axis of the dielectric tensor only. Such studies showed that modes feature anomalous ordering in such a way that cut-off appears for lower order modes as light frequency increases. Interestingly, stopped light featuring null group velocity at specific wavelengths has been predicted for modes near cut-off in type II HMMs planar waveguides with optical axis (OA) oriented along the propagation direction [1]. Here, we theoretically study light propagation in type II HMMs planar waveguides for any orientation ϕ of the OA contained in a plane parallel to the waveguides interfaces. The results shows that a change in the wavelength only changes the OA direction ϕ at which stopped light exist. The process is a consequence of the lack of mode cut-off and it is caused by a mode spectroscopy transition from hyperbolic modes with anomalous order propagating along the OA (ϕ = 0º), to modes with normal order, propagating orthogonally to the OA (ϕ = 90º).
AB - Hyperbolic metamaterials (HMMs) are uniaxial materials that have hyperbolic dispersion curves. There are two types of hyperbolic metamaterials, type I that is described by a permittivity tensor with ε|| < 0 and ε⊥ > 0, and type II that has ε|| > 0 and ε⊥ < 0. Planar waveguides with hyperbolic materials have been mostly studied with propagation direction along the principal axis of the dielectric tensor only. Such studies showed that modes feature anomalous ordering in such a way that cut-off appears for lower order modes as light frequency increases. Interestingly, stopped light featuring null group velocity at specific wavelengths has been predicted for modes near cut-off in type II HMMs planar waveguides with optical axis (OA) oriented along the propagation direction [1]. Here, we theoretically study light propagation in type II HMMs planar waveguides for any orientation ϕ of the OA contained in a plane parallel to the waveguides interfaces. The results shows that a change in the wavelength only changes the OA direction ϕ at which stopped light exist. The process is a consequence of the lack of mode cut-off and it is caused by a mode spectroscopy transition from hyperbolic modes with anomalous order propagating along the OA (ϕ = 0º), to modes with normal order, propagating orthogonally to the OA (ϕ = 90º).
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M3 - Conference contribution
AN - SCOPUS:85084543132
T3 - Optics InfoBase Conference Papers
BT - European Quantum Electronics Conference, EQEC_2019
PB - OSA - The Optical Society
T2 - European Quantum Electronics Conference, EQEC_2019
Y2 - 23 June 2019 through 27 June 2019
ER -