Dual-polarization helical interface states in inverse-designed photonic crystals with glide symmetry

Chen, Yafeng; Wang, Hai-Xiao; Lan, Zhihao; Su, Zhongqing

doi:10.1103/physrevb.109.075132

Phys. Rev. B

2024

DOI: 10.1103/physrevb.109.075132

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Dual-polarization helical interface states in inverse-designed photonic crystals with glide symmetry

Yafeng Chen,

Hai-Xiao Wang,

Zhihao Lan

et al.

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2024

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Cited by 4 publications

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Design of second-order phoxonic topological insulators with customized bandgaps

Chen,

Wen,

Lan

et al. 2024

International Journal of Mechanical Sciences

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Design of second-order phoxonic topological insulators with customized bandgaps

Chen,

Wen,

Lan

et al. 2024

International Journal of Mechanical Sciences

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Topology-optimized photonic topological crystalline insulators with multiband helical edge states

Chen,

Lan,

Wang

et al. 2024

New J. Phys.

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Photonic topological crystalline insulators (PTCIs) with helical edge states provide an alternative way to achieve robust electromagnetic wave transport and processing. However, most existing PTCIs only involve a single topological bandgap, and generally support a pair of gapped helical edge states, restricting the scope of applications in various fields such as multiband waveguides, filters, and communication systems. Here, we design dual-band PTCIs, in which multiple helical edge modes appear within two distinct bulk gaps, for transverse electric (TE) and transverse magnetic (TM) modes, respectively, by introducing the topology optimization method into the photonic crystals (PCs) with glide symmetry. For PTCIs with TE modes, the mismatched frequency ranges of edge modes hosted by two orthometric boundaries offer an opportunity to realize a photonic demultiplexer. For PTCIs with TM modes, we show the enhanced second harmonic generation through the coupling of multiband edge modes by matching the frequency ranges of edge modes within the first and second bandgaps to fundamental and second harmonic waves, respectively. This work provides a new way for designing multiband PTCIs with helical edge states, having promising potentials in developing multiband topological photonic devices for both linear and nonlinear applications.

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Dual-polarization topological rainbow concentrators based on glide-reflection symmetry

Luo,

Shi,

Feng

et al. 2024

Phys. Rev. A

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Dual-polarization helical interface states in inverse-designed photonic crystals with glide symmetry

Cited by 4 publications

References 56 publications

Design of second-order phoxonic topological insulators with customized bandgaps

Design of second-order phoxonic topological insulators with customized bandgaps

Topology-optimized photonic topological crystalline insulators with multiband helical edge states

Dual-polarization topological rainbow concentrators based on glide-reflection symmetry

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