Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Park, Haedong"'
Surface potential in a topological matter could unprecedentedly localize the waves. However, this surface potential is yet to be exploited in topological photonic systems. Here, we demonstrate that photonic surface states can be induced and controlle
Externí odkaz:
http://arxiv.org/abs/2302.09154
Topological phase transition and surface states in a non-Abelian charged nodal line photonic crystal
Publikováno v:
Nanophotonics, Vol 13, Iss 7, Pp 1079-1089 (2024)
Topological charges of nodal lines in a multigap system are represented by non-Abelian numbers, and the Euler class, a topological invariant, can be used to explain their topological phase transitions, such as pair-annihilation of nodal lines. Up unt
Externí odkaz:
https://doaj.org/article/d8e02148ed9e4bb5a5df3797404a9f78
Publikováno v:
Phys. Rev. B 105, 214108 (2022)
Although a large class of topological materials have uniformly been identified using symmetry properties of wave functions, the past two years have seen the rise of multi-gap topologies beyond this paradigm. Given recent reports of unexplored feature
Externí odkaz:
http://arxiv.org/abs/2204.00351
Topological insulators constitute one of the most intriguing phenomena in modern condensed matter theory. The unique and exotic properties of topological states of matter allow for unidirectional gapless electron transport and extremely accurate meas
Externí odkaz:
http://arxiv.org/abs/2201.06639
Autor:
Park, Haedong, Oh, Sang Soon
The topological nature of nodal lines in a three-band system can be described by non-Abelian topological charges called quaternion numbers. Due to the gauge freedom of the eigenstates, the sign of the non-Abelian topological charges can be flipped by
Externí odkaz:
http://arxiv.org/abs/2109.10635
Autor:
Park, Haedong1,2 (AUTHOR) hdp1@korea.ac.kr, Oh, Sang Soon2 (AUTHOR) ohs2@cardiff.ac.uk, Lee, Seungwoo1,3,4,5 (AUTHOR) seungwoo@korea.ac.kr
Publikováno v:
Scientific Reports. 3/26/2024, Vol. 14 Issue 1, p1-12. 12p.
Publikováno v:
ACS Photonics2021
A nodal link is a special form of a line degeneracy (a nodal line) between adjacent bands in the momentum space of a three-dimensional topological crystal. Unlike nodal chains or knots, a nodal link consists of two or more mutually-linked rings that
Externí odkaz:
http://arxiv.org/abs/2102.12546
Publikováno v:
Nanophotonics, Vol 12, Iss 13, Pp 2611-2621 (2023)
Moulding the flow of phononic waves in three-dimensional (3D) space plays a critical role in controlling the sound and thermal properties of matter. To this end, 3D phononic crystals (PnCs) have been considered the gold standard because their complet
Externí odkaz:
https://doaj.org/article/304a0f1c8fa64d66a49e48336476e3c7
Publikováno v:
Nanophotonics, Vol 11, Iss 11, Pp 2779-2801 (2022)
Topological insulators constitute one of the most intriguing phenomena in modern condensed matter theory. The unique and exotic properties of topological states of matter allow for unidirectional gapless electron transport and extremely accurate meas
Externí odkaz:
https://doaj.org/article/35da578e68684865b8b591dd40ff0732
Autor:
Park Haedong, Jo Seungyun, Kang Byungsoo, Hur Kahyun, Oh Sang Soon, Ryu Du Yeol, Lee Seungwoo
Publikováno v:
Nanophotonics, Vol 11, Iss 11, Pp 2583-2615 (2022)
A gyroid crystal possesses a peculiar structural feature that can be conceptualized as a triply periodic surface with a constant mean curvature of zero. The exotic optical properties such as the photonic bandgap and optical chirality can emerge from
Externí odkaz:
https://doaj.org/article/13ef67e32f1948caaf8d6227a93734d7