A gain route to reversed Cherenkov radiation DOI Creative Commons
Ruoxi Chen, Zheng Gong,

Z.-Y. Wang

и другие.

Science Advances, Год журнала: 2025, Номер 11(14)

Опубликована: Апрель 4, 2025

In his landmark paper from 1968, Veselago showed that Cherenkov radiation can be reversed in materials with a negative index of refraction, inspiring substantial research into such what became one the cornerstone concepts field metamaterials. Following and ongoing investigations considered it impossible to occur homogeneous isotropic slab positive refractive index. Here, we break this long-held belief by finding emergence positive-index exploiting optical gain. We find precise conditions under which backward-propagating is maintained while forward-propagating suppressed. Counterintuitively, intensity angular spread made robust thickness. Under scenario, increasing gain could decrease increase spread.

Язык: Английский

Antihyperbolic surface waves on hyperbolic metasurfaces DOI
Chenxu Bian, Xinyan Zhang, Wenbo Ma

и другие.

Physical review. A/Physical review, A, Год журнала: 2025, Номер 111(3)

Опубликована: Март 21, 2025

Язык: Английский

Процитировано

0
Scattering-free Plasmonic Brewster Effect via Metasurfaces DOI
Xinyan Zhang, Xingshuo Cui, Tong Cai

и другие.

ACS Photonics, Год журнала: 2025, Номер unknown

Опубликована: Март 30, 2025

The Brewster effect, dating back to the pioneering work of Sir David in 1815, offers a crucial route achieve 100% energy conversion between incident and transmitted propagating waves at an optical interface is fundamental importance many practical applications, such as polarization filtering, beam steering, broadband angular selectivity. However, whether effect surface can be implemented without involvement negative-permittivity or negative-permeability materials remains elusive. This due formidable challenge fully suppress both parasitic scattering into reflection under incidence waves. Here, we reveal feasible scattering-free plasmonic via isotropic metasurfaces, along with usage positive-permittivity positive-permeability metamaterials anisotropic magnetic responses. In essence, response judiciously designed waves, while facilitates full suppression supported by metasurfaces. Moreover, find that this metasurfaces further engineered occur for arbitrary angles, giving rise exotic phenomenon all-angle effect.

Язык: Английский

Процитировано

0
A gain route to reversed Cherenkov radiation DOI Creative Commons
Ruoxi Chen, Zheng Gong,

Z.-Y. Wang

и другие.

Science Advances, Год журнала: 2025, Номер 11(14)

Опубликована: Апрель 4, 2025

In his landmark paper from 1968, Veselago showed that Cherenkov radiation can be reversed in materials with a negative index of refraction, inspiring substantial research into such what became one the cornerstone concepts field metamaterials. Following and ongoing investigations considered it impossible to occur homogeneous isotropic slab positive refractive index. Here, we break this long-held belief by finding emergence positive-index exploiting optical gain. We find precise conditions under which backward-propagating is maintained while forward-propagating suppressed. Counterintuitively, intensity angular spread made robust thickness. Under scenario, increasing gain could decrease increase spread.

Язык: Английский

Процитировано

0