Full 2π tunable phase modulation using avoided crossing of resonances.
Sign Up to like & getrecommendations! Published in 2022 at "Nature communications"
DOI: 10.1038/s41467-022-29721-7
Abstract: Active metasurfaces have been proposed as one attractive means of achieving high-resolution spatiotemporal control of optical wavefronts, having applications such as LIDAR and dynamic holography. However, achieving full, dynamic phase control has been elusive in… read more here.
Keywords: full tunable; tunable phase; phase modulation; avoided crossing ... See more keywords
Bifurcation of avoided crossing at an exceptional point in the dispersion of sound and light in locally resonant media
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Applied Physics"
DOI: 10.1063/1.5012999
Abstract: The avoided crossing behavior in the interaction of propagating sound or light waves with resonant inclusions is analyzed using a simple model of an acoustic medium containing damped mass-spring oscillators, which is shown to be… read more here.
Keywords: avoided crossing; dispersion; exceptional point; bifurcation avoided ... See more keywords
Band structure transformation of the avoided crossing type in impure graphene
Sign Up to like & getrecommendations! Published in 2024 at "Low Temperature Physics"
DOI: 10.1063/10.0026090
Abstract: We show that the electronic spectrum in graphene, not unlike in other low-dimensional systems, can manifest a sharp impurity resonance near the Dirac point due to the presence of a single weakly coupled impurity described… read more here.
Keywords: band structure; impurity; avoided crossing; graphene ... See more keywords
Theory of the phonon spectrum in host-guest crystalline solids with avoided crossing
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.220201
Abstract: We develop an analytical model to describe the phonon dispersion relations of host-guest lattices with heavy guest atoms (rattlers). Crucially, the model also accounts for phonon damping arising from anharmonicity. The spectrum of low energy… read more here.
Keywords: avoided crossing; host guest; spectrum; energy ... See more keywords