Observation of the Generalized Kerker Effect Mediated by Quasi-Bound States in the Continuum

Nano Letters, Год журнала: 2024, Номер unknown

Опубликована: Дек. 19, 2024

The generalized Kerker effect (GKE) arising from the interference of high-order multipoles has attracted more interest due to its direct correlation with various functionalities in nanophotonics. realization GKE at oblique incidence is highly desired yet remains underexplored. Herein, we report experimental observation by leveraging quasi-bound states continuum (QBICs) supported a silicon metasurface. low-Q leaky mode resonance interacts one high-Q QBICs under incidence, leading formation hybrid magnetic quadrupole (MQ)–magnetic dipole (MD) mode. amplitude MQ–MD can be precisely controlled achieve an out-of-phase condition varying incident angle, resulting second condition. Our results reveal that associated rich multipole resonances provide new paradigm for tailoring GKE, suggesting important implications advanced metadevices.

Язык: Английский

---

Phase-Detection-Based High-Sensitivity Refractive Index Sensing via Chiral BIC Metasurfaces

Physics Letters A, Год журнала: 2025, Номер unknown, С. 130540 - 130540

Опубликована: Апрель 1, 2025

Язык: Английский

---

Tunable Chiral Quasi-Bound States in the Continuum in Terahertz Metasurfaces

Physica B Condensed Matter, Год журнала: 2025, Номер unknown, С. 417350 - 417350

Опубликована: Май 1, 2025

Язык: Английский

---

High‐Q Chiral Metasurfaces: Broadband Spectral Tunability with Angle‐Dependent Response

Advanced Optical Materials, Год журнала: 2025, Номер unknown

Опубликована: Май 5, 2025

Abstract Chiral metaphotonics are essential for many applications such as enantioselective sensing where high‐quality factor (Q) resonances and strong chiroptical activity demanded. Furthermore, spectral tuning using the same structure without compromising high‐Q chiral responses is highly desirable. This study presents a silicon‐based metasurface that maintains broadband across its full operational band, enabling through adjusting in‐plane wavevector while preserving high Q factors circular dichroism (CD) values. The metasurface, composed of silicon pillars on slab, demonstrates bands in both directions. confirmed by mode CD calculated from eigenfields transmittance far‐field spectra full‐wave simulations. angle‐dependent measured fabricated exhibit quality 1100, value 0.61, an angular range 12°, good agreement with numerical predictions. Additionally, enhanced third harmonic generation this nonlocal exhibits further improved nonlinear (0.95), which can also be spectrally tuned varying incident angle. These findings lay groundwork advanced metasurfaces operating over extensive ranges, significant implications requiring precise matching tunable responses.

Язык: Английский

---

Enhanced chiroptical effects and high-efficiency polarization-selective focusing based on dielectrically chiral metasurfaces

Optics Communications, Год журнала: 2024, Номер unknown, С. 131334 - 131334

Опубликована: Дек. 1, 2024

Язык: Английский

---