Sphere of arbitrarily polarized exceptional points with a single planar metasurface DOI Creative Commons
Haoye Qin, Zijin Yang, Po‐Sheng Huang

и другие.

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 18, 2025

Exceptional points (EPs) are spectral singularities of non-Hermitian systems and represent the coalescence eigenvalues eigenstates. Traditional photonic typically exhibit coalesced eigenstates that correspond to circular polarizations a specific handedness, thereby restricting their applicability only poles Poincaré sphere. Here, by judiciously combining optical anisotropy, chirality non-Hermiticity diffractive plasmonic metasurfaces with basis transformation, we achieve continuum EPs for which corresponding can access any point on sphere, greatly alleviating strict requirement approaching EP degeneracy. Our theoretical proposal experimental implementation overcome main practical limitation EPs, extending topological phase arbitrarily polarized state within diffraction region. The emergence these non-conventional not contributes applications in wavefront engineering multiplexing, but also brings new fundamental properties general.

Язык: Английский

Three‐Channel Wavefront Shaping Using Non‐Interleaved Spin‐Multiplexed Plasmonic Metasurfaces DOI Creative Commons

Xingling Pan,

Yadong Deng,

Ziru Cai

и другие.

Advanced Science, Год журнала: 2025, Номер unknown

Опубликована: Фев. 18, 2025

Abstract Metasurfaces have garnered significant attention for their ability to manipulate light waves with multifunctional capabilities. Integrating independent wavefront controls within a single metasurface is essential meet the growing demand high‐capacity, flat photonic devices. In this work, versatile non‐interleaved plasmonic platform utilizing quarter‐wave plate meta‐atoms and simultaneous phase modulation of both co‐ cross‐polarized circularly polarized subwavelength pixels, achieved by merging resonance Pancharatnam‐Berry phases presented. We propose experimentally validate three proof‐of‐concept designs operating in near‐infrared range: beam deflector distinct reflection angles, focusing metalens focal lengths, vortex generator tunable topological charges. This paves way customizable, multi‐channel functionalities, advancing development integrated devices enhanced versatility.

Язык: Английский

Процитировано

1
Sphere of arbitrarily polarized exceptional points with a single planar metasurface DOI Creative Commons
Haoye Qin, Zijin Yang, Po‐Sheng Huang

и другие.

Nature Communications, Год журнала: 2025, Номер 16(1)

Опубликована: Март 18, 2025

Exceptional points (EPs) are spectral singularities of non-Hermitian systems and represent the coalescence eigenvalues eigenstates. Traditional photonic typically exhibit coalesced eigenstates that correspond to circular polarizations a specific handedness, thereby restricting their applicability only poles Poincaré sphere. Here, by judiciously combining optical anisotropy, chirality non-Hermiticity diffractive plasmonic metasurfaces with basis transformation, we achieve continuum EPs for which corresponding can access any point on sphere, greatly alleviating strict requirement approaching EP degeneracy. Our theoretical proposal experimental implementation overcome main practical limitation EPs, extending topological phase arbitrarily polarized state within diffraction region. The emergence these non-conventional not contributes applications in wavefront engineering multiplexing, but also brings new fundamental properties general.

Язык: Английский

Процитировано

1