Abstract

Dyakonov–Voigt (DV) surface waves guided by the planar interface of (i) material $ {\cal A} $, which is a uniaxial dielectric material specified by a relative permittivity dyadic with eigenvalues $ \varepsilon _{\cal A}^s $ and $ \varepsilon _{\cal A}^t $, and (ii) material $ {\cal B} $, which is an isotropic dielectric material with relative permittivity $ {\varepsilon _{\cal B}} $, are numerically investigated by solving the corresponding canonical boundary-value problem. The two partnering materials were generally dissipative, with the optic axis of material $ {\cal A} $ being inclined at the angle $ \chi \in [ {{0^ \circ },{{90}^ \circ }} ] $ relative to the interface plane. No solutions of the dispersion equation for DV surface waves exist when $ \chi = {90^ \circ } $. Also, no solutions exist for $ \chi \in ( {{0^ \circ },{{90}^ \circ }}) $, when both partnering materials are nondissipative. For $ \chi \in [ {{0^ \circ },{{90}^ \circ }} ) $, the degree of dissipation of material $ {\cal A} $ has a profound effect on the phase speeds, propagation lengths, and penetration depths of the DV surface waves. For mid-range values of $ \chi $, DV surface waves with negative phase velocities were found. For fixed values of $ \varepsilon _{\cal A}^s $ and $ \varepsilon _{\cal A}^t $ in the upper-half-complex plane, DV surface-wave propagation is only possible for large values of $ \chi $ when $ |{\varepsilon _{\cal B}}| $ is very small.

© 2019 Optical Society of America

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Corrections

5 November 2019: Typographical corrections were made to Eq. (6) and to Ref. [23].


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Equations (28)

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