Topological Polarization Beam Splitter in Dual-Polarization All-Dielectric Valley Photonic Crystals

He, Xin‐Tao; Guo, Chao-Heng; Tang, Guojing; Li, Mengyu; Chen, Xiao‐Dong; Dong, Jian‐Wen

doi:10.1103/physrevapplied.18.044080

Cited by 7 publications

(4 citation statements)

References 40 publications

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“…This configuration (S = -2) corresponds to a bearded interface in a honeycomb lattice VPhC waveguide 23 . This result of high transmission is essentially similar to those reported in reference [19,23].…”

Section: Numerical Studies Of Z-shaped Waveguides (I) W1wg (S = 3 Mir...supporting

confidence: 91%

“…IA-PhCWGs based on a triangular lattice have been already proposed and high transmissions through 120-degree bends have been observed 19,22,29,30,32,38 . Here, we employ slightly different IA-PhCWGs based on triangular air-hole lattices and focus on the first bandgap in TE-polarization (Fig.…”

Section: Model Structuresmentioning

confidence: 99%

“…For example, the zigzag interface in reference [19] 19 corresponds to S = −1, and the bearded interface in reference [22] 22 corresponds to S = −2. In addition, honeycomb lattice VPhCs can be classified in the same manner if we focus on the configuration of large holes (or pillars).…”

Section: Model Structuresmentioning

confidence: 99%

“…In addition, honeycomb lattice VPhCs can be classified in the same manner if we focus on the configuration of large holes (or pillars). When S = ±1, the lattice becomes one of the sublattices of a zigzag interface honeycomb lattice [15][16][17][18][19][20]36 . When S = ±2, the lattice becomes one of the sublattices of a bearded interface honeycomb lattice [22][23][24][25][26][27] .…”

Section: Model Structuresmentioning

confidence: 99%

See 3 more Smart Citations

High Transmission in 120-degree Sharp Bends of Inversion-symmetric and Inversion-asymmetric Photonic Crystal Waveguides

Notomi,

Dai,

Yoda

et al. 2023

Preprint

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Bending loss is one of the serious problems for constructing nanophotonic integrated circuits. Recently, many works reported that valley photonic crystals (VPhCs) enable significantly high transmission via 120-degree sharp bends. However, it is unclear whether the high bend-transmission results directly from the valley-photonic effects, which are based on the breaking of inversion-symmetry. In this study, we conduct a series of comparative numerical and experimental investigations of bend transmission in various triangular PhCs with and without inversion symmetry and reveal that the high bend transmission is solely determined by the domain-wall configuration and independent of the existence of the inversion symmetry. Preliminary analysis of the polarization distribution indicates that high bend transmissions are closely related to the appearance of local topological polarization singularities near the bending section. Our work demonstrates that high transmission can be achieved in a much wider family of PhC waveguides, which may provide novel designs for low-loss nanophotonic integrated circuits with large flexibility and a new understanding of the nature of valley-photonics.

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Section: Numerical Studies Of Z-shaped Waveguides (I) W1wg (S = 3 Mir...supporting

confidence: 91%

Section: Model Structuresmentioning

confidence: 99%

Section: Model Structuresmentioning

confidence: 99%

Section: Model Structuresmentioning

confidence: 99%

See 2 more Smart Citations

High Transmission in 120-degree Sharp Bends of Inversion-symmetric and Inversion-asymmetric Photonic Crystal Waveguides

Notomi,

Dai,

Yoda

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

Topological Photonic Chiral Mode Converters

Zhang,

Wang,

et al. 2024

Laser & Photonics Reviews

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Topological photonic states are immune to structural defects and perturbations, which are considered as a promising solution for realizing robust integrated optical devices. As an essential photonic component, the chiral mode converter, which can directionally switch the modes of photonic states, plays a key role in integrated photonics. However, there is no way to realize topological photonic chiral mode converters. Here, a method is proposed to realize topological photonic chiral mode converters by dynamically encircling exceptional points in topological photonic systems. The device can directionally switch modes of topological photonic states and endow the mode converter with topology protection. Chiral dynamic behavior emerges between the two topological states due to the nonadiabatic transitions within the non‐Hermitian topological photonic system. The topological photonic chiral mode converter is robust against random perturbations of coupling strengths. The realization of a topological chiral mode converter endows topology protection into traditional photonic devices and will promote the practical applications of topological photonic states, such as mode multiplexers and optical isolators.

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

Chen,

Wang,

Lan

et al. 2024

Phys. Rev. B

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Topological Polarization Beam Splitter in Dual-Polarization All-Dielectric Valley Photonic Crystals

Cited by 7 publications

References 40 publications

High Transmission in 120-degree Sharp Bends of Inversion-symmetric and Inversion-asymmetric Photonic Crystal Waveguides

High Transmission in 120-degree Sharp Bends of Inversion-symmetric and Inversion-asymmetric Photonic Crystal Waveguides

Topological Photonic Chiral Mode Converters

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

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