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Higher-order Topological Phase in a Simple Two-dimensional Dielectric Photonic Crystals
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Abstract
In this paper, a one-dimensional magneto-optic(MO) multilayer structure with the nonreciprocal transmission of dual-mode is designed. The energy band and transmission properties of composite structures are studied based on transfer matrix theory. Two pairs of nonreciprocal dispersive curves corresponding to edge modes appear in the bandgap. When the gain and loss factors are introduced into the multilayer structure, tunable and nonreciprocal extraordinary transmission appears above PT thresholds. Significantly, the composite structure with small and unequal gain/loss factors induces extraordinary transmission and keeps nonreciprocal frequencies stable. Such distinguishing properties may provide these structures with attractive applications as optical isolators and multichannel nonreciprocal optical devices.
Springer Science and Business Media LLC
Title: Higher-order Topological Phase in a Simple Two-dimensional Dielectric Photonic Crystals
Description:
Abstract
In this paper, a one-dimensional magneto-optic(MO) multilayer structure with the nonreciprocal transmission of dual-mode is designed.
The energy band and transmission properties of composite structures are studied based on transfer matrix theory.
Two pairs of nonreciprocal dispersive curves corresponding to edge modes appear in the bandgap.
When the gain and loss factors are introduced into the multilayer structure, tunable and nonreciprocal extraordinary transmission appears above PT thresholds.
Significantly, the composite structure with small and unequal gain/loss factors induces extraordinary transmission and keeps nonreciprocal frequencies stable.
Such distinguishing properties may provide these structures with attractive applications as optical isolators and multichannel nonreciprocal optical devices.
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