Chiral exceptional points in metasurfaces
WebDec 13, 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-conserving system, in which two eigenvectors of a non-Hermitian Hamiltonian coalesce. We explore how EPs can be realized in a ... WebDielectric metasurfaces have emerged as a powerful platform for novel optical biosensors. Due to their low optical loss and strong light–matter interaction, they demonstrate several exotic optical properties, including sharp resonances, strong near-field enhancements, and the compelling capability to support magnetic modes. They also …
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. ...
WebApr 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 … WebWe investigate the exceptional points (EPs) in chiral metasurfaces composed of periodic arrays of two orthogonally orientated graphene strips in the terahertz frequency. By tuning the geometric parameters and incident wavelengths, the EPs emerge as two eigenvalues of the transmission matrix coalesce. The EPs possess a certain chirality as light at the …
WebNov 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 … WebMay 13, 2024 · This study proposes an approach to generate high-order exceptional points (EPs) in non-Hermitian systems. A system comprising a homogenous waveguide is considered wherein the imaginary part of the refractive index is modulated using a one-dimensional Moiré profile. This gain-loss modulation couples different lossless …
WebNov 3, 2024 · 2024. TLDR. It is shown that controlling the absorption of a coupled microresonator system can produce a new kind of absorbing exceptional point, and how these exceptional points are distinct and how systems can be engineered to exhibit new scattering behavior. 62. PDF.
WebAn 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 … cso athol crisisWebExceptional 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 … cso as a serviceWebJun 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 ... cso assistant harris countyWebthe 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 … cso athol maWebKang, M., Chen, J., & Chong, Y. D. (2016). Chiral exceptional points in metasurfaces. Physical Review A, 94(3). doi:10.1103/physreva.94.033834 ea groundwater flooding mapWebSep 1, 2024 · Abstract. We investigate the exceptional points (EPs) in chiral metasurfaces composed of periodic arrays of two orthogonally orientated graphene strips in the … cso assemblyWebJan 18, 2024 · In conclusion, we have presented, to our knowledge, the first experimental observation of optical chiral BICs enabling simultaneously high values of the Q -factor ( … cso athol mass