Topological line singularities in scattering matrix and bound states in the continuum

Wenzhe Liu; Yuan-Song Zeng; Geng-Bo Wu; C. T. Chan

Topological line singularities in scattering matrix and bound states in the continuum

Wenzhe Liu^*
, Yuan-Song Zeng
, Geng-Bo Wu
, C. T. Chan

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

Abstract

We reveal that bound states in the continuum function as robust chain points pinning together nodal lines in scattering matrices. These singularities induce observable phase vortices and persist even when symmetry is broken, providing a new framework for understanding topological protection in open photonic systems. © 2025, META Conference.

Original language	English
Title of host publication	META 2025 Torremolinos - Spain
Subtitle of host publication	The 15^th International Conference on Metamaterials, Photonic Crystals and Plasmonics
Editors	Khaled Mnaymneh, Said Zouhdi
Pages	1628-1629
Number of pages	2
Publication status	Published - Jul 2025
Event	15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2025) - Costa del Sol Conference and Exhibition Centre, Malaga, Spain Duration: 22 Jul 2025 → 25 Jul 2025 https://metaconferences.org/META25/index.php/META/index

Publication series

Name	International Conference on Metamaterials, Photonic Crystals and Plasmonics
ISSN (Print)	2429-1390

Conference

Conference	15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2025)
Place	Spain
City	Malaga
Period	22/07/25 → 25/07/25
Internet address	https://metaconferences.org/META25/index.php/META/index

Funding

W.L. and C.T.C. are supported by Hong Kong RGC (CRS HKUST601/23 and AoE/P502/20). Y.-S.Z. and G.-B.W. are supported by the Research Grants Council of Hong Kong (CityU 21207824).

RGC Funding Information

RGC-funded

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https://metaconferences.org/META25/index.php/META/proceeding

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Liu, W., Zeng, Y.-S., Wu, G.-B., & Chan, C. T. (2025). Topological line singularities in scattering matrix and bound states in the continuum. In K. Mnaymneh, & S. Zouhdi (Eds.), META 2025 Torremolinos - Spain: The 15^th International Conference on Metamaterials, Photonic Crystals and Plasmonics (pp. 1628-1629). (International Conference on Metamaterials, Photonic Crystals and Plasmonics). https://metaconferences.org/META25/index.php/META/proceeding

Liu, Wenzhe ; Zeng, Yuan-Song ; Wu, Geng-Bo et al. / Topological line singularities in scattering matrix and bound states in the continuum. META 2025 Torremolinos - Spain: The 15^th International Conference on Metamaterials, Photonic Crystals and Plasmonics. editor / Khaled Mnaymneh ; Said Zouhdi. 2025. pp. 1628-1629 (International Conference on Metamaterials, Photonic Crystals and Plasmonics).

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title = "Topological line singularities in scattering matrix and bound states in the continuum",

abstract = "We reveal that bound states in the continuum function as robust chain points pinning together nodal lines in scattering matrices. These singularities induce observable phase vortices and persist even when symmetry is broken, providing a new framework for understanding topological protection in open photonic systems. {\textcopyright} 2025, META Conference.",

author = "Wenzhe Liu and Yuan-Song Zeng and Geng-Bo Wu and Chan, \{C. T.\}",

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language = "English",

series = "International Conference on Metamaterials, Photonic Crystals and Plasmonics",

pages = "1628--1629",

editor = "Khaled Mnaymneh and Said Zouhdi",

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note = "15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2025) ; Conference date: 22-07-2025 Through 25-07-2025",

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Liu, W, Zeng, Y-S, Wu, G-B & Chan, CT 2025, Topological line singularities in scattering matrix and bound states in the continuum. in K Mnaymneh & S Zouhdi (eds), META 2025 Torremolinos - Spain: The 15^th International Conference on Metamaterials, Photonic Crystals and Plasmonics. International Conference on Metamaterials, Photonic Crystals and Plasmonics, pp. 1628-1629, 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2025), Malaga, Spain, 22/07/25. <https://metaconferences.org/META25/index.php/META/proceeding>

Topological line singularities in scattering matrix and bound states in the continuum. / Liu, Wenzhe; Zeng, Yuan-Song; Wu, Geng-Bo et al.
META 2025 Torremolinos - Spain: The 15^th International Conference on Metamaterials, Photonic Crystals and Plasmonics. ed. / Khaled Mnaymneh; Said Zouhdi. 2025. p. 1628-1629 (International Conference on Metamaterials, Photonic Crystals and Plasmonics).

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

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AU - Liu, Wenzhe

AU - Zeng, Yuan-Song

AU - Wu, Geng-Bo

AU - Chan, C. T.

PY - 2025/7

Y1 - 2025/7

N2 - We reveal that bound states in the continuum function as robust chain points pinning together nodal lines in scattering matrices. These singularities induce observable phase vortices and persist even when symmetry is broken, providing a new framework for understanding topological protection in open photonic systems. © 2025, META Conference.

AB - We reveal that bound states in the continuum function as robust chain points pinning together nodal lines in scattering matrices. These singularities induce observable phase vortices and persist even when symmetry is broken, providing a new framework for understanding topological protection in open photonic systems. © 2025, META Conference.

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M3 - RGC 32 - Refereed conference paper (with host publication)

T3 - International Conference on Metamaterials, Photonic Crystals and Plasmonics

SP - 1628

EP - 1629

BT - META 2025 Torremolinos - Spain

A2 - Mnaymneh, Khaled

A2 - Zouhdi, Said

T2 - 15th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META 2025)

Y2 - 22 July 2025 through 25 July 2025

ER -

Topological line singularities in scattering matrix and bound states in the continuum

Abstract

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ECS: Advanced and Green Beamforming Metasurface Antennas for 6G

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Topological line singularities in scattering matrix and bound states in the continuum

Abstract

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Funding

RGC Funding Information

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Other Access Options

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Other Files and Links

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ECS: Advanced and Green Beamforming Metasurface Antennas for 6G

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