Chiral exceptional points in metasurfaces
WebNon-Hermitian degeneracies, also known as exceptional points (EPs), have been the focus of much attention due to their singular eigenvalue surface structure. Nevertheless, as pertaining to a non-Hermitian metasurface platform, the reduction of an eigenspace dimensionality at the EP has been investigated mostly in a passive repetitive manner. WebSep 8, 2024 · We used the physics of chiral quasi-bound states in the continuum to demonstrate the efficient and controllable emission of circularly polarized light from resonant metasurfaces. Exploiting intrinsic …
Chiral exceptional points in metasurfaces
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WebSep 8, 2024 · The chiral microlasers can have large DOPs and directional output, but only in specific power ranges. ... At the C points, ... Chiral emission from resonant metasurfaces, Science (2024). DOI: 10. ... Webthe continuum with near-unity chiral dichroism of 0.93 and record-high quality factor exceeding 2663 for visible frequencies. Our chiral metasurfaces promise a plethora of applications in chiral light sources and detectors, chiral sensing, valleytronics and asymmetric photocatalysis. Collins, 2024 #2690. Lodahl, 2024 #3102. Parappurath, 2024 …
WebSep 19, 2016 · An exceptional point (EP) is a degeneracy occurring in a non-energy-conserving system, in which two eigenvectors of a non-Hermitian Hamiltonian coalesce. We explore how EPs can be realized in a metamaterial surface, or metasurface, consisting … WebJun 4, 2024 · This extraordinary chiroptical response is achieved through band folding that enables coupling of incident light to spin-polarized flat bands surrounded by exceptional rings, formed at Dirac points of plasmonic lattice resonances. The reported spin polarization differs from previously reported chiral and pseudochiral phenomena in that it solely ...
WebExceptional points are special points in non-Hermitian systems, and there are many novel physical phenomena in the parameter space near the exceptional points. In recent years, metasurface has been a popular topic in physics. A large number of devices with superior performance have been designed based on metasurface platform. The appearance of … WebSep 1, 2024 · Abstract. We investigate the exceptional points (EPs) in chiral metasurfaces composed of periodic arrays of two orthogonally orientated graphene strips in the …
WebNon-Hermitian chiral degeneracy of gated graphene metasurfaces. Non-Hermitian degeneracies, also known as exceptional points (EPs), have been the focus of much attention due to their singular eigenvalue surface structure. Nevertheless, as pertaining to a non-Hermitian metasurface platform, the reduction of an eigenspace dimensionality at …
WebThe chiral EP is signified by a point (drawn with a black dot) on each of the Riemann surfaces. ... also known as exceptional points (EPs), have been the focus of much attention due to their ... lyrics to i\u0027ve been born again timothy wrightWebNov 14, 2024 · Abstract. From being an unfavorable consequence to finding itself as the intended imaginary part of a non-Hermitian system, loss has truly emerged as more of a friend than a foe in the context of acoustic metasurfaces. With the promising features of sub-wavelength geometries and the rapid advances in manufacturing techniques that … kirsea buildersWebWe experimentally demonstrate an electrical and spectral way of accessing the chiral EPs with non-Hermitian gate-controlled graphene metasurfaces. This work reveals the EP … kirsch wrought iron double bracketWebSep 9, 2024 · The field of non-Hermitian physics provides a fertile ground for studying unconventional physical phenomena in open systems (1, 2).Many of the most intriguing phenomena occur at exceptional points … lyrics to i\u0027m walkingWebApr 12, 2024 · Chiral exceptional points in metasurfaces. M. Kang, J. Chen, Y. Chong. Physics. 2016. An exceptional point (EP) is a degeneracy occurring in a non-energy … kirsch wrought iron collectionWebAn exceptional point (EP) is a degeneracy occurring in a non-energy-conserving system, in which two eigenvectors of a non-Hermitian Hamiltonian coalesce. We explore how EPs … lyrics to i\u0027ve been waitingWebSep 1, 2024 · From a fundamental perspective, a metasurface is an open system, continuously exchanging and/or absorbing energy between the impinging field and the … kirsch woolworths