Asymmetrical Chirality in 3D Bended Metasurface
Research output: Contribution to journal › Journal article › Research › peer-review
Standard
Asymmetrical Chirality in 3D Bended Metasurface. / Pan, Ruhao; Liu, Zhe; Zhu, Wei; Du, Shuo; Gu, Changzhi; Li, Junjie.
In: Advanced Functional Materials, Vol. 31, No. 31, 2100689, 2021.Research output: Contribution to journal › Journal article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Asymmetrical Chirality in 3D Bended Metasurface
AU - Pan, Ruhao
AU - Liu, Zhe
AU - Zhu, Wei
AU - Du, Shuo
AU - Gu, Changzhi
AU - Li, Junjie
PY - 2021
Y1 - 2021
N2 - Chiral metasurfaces offer crucial opportunities to expand the application potential for chiral photonics, but its desired freely structural control and giant circular dichroism (CD) allow for more and greater challenges. Here, different from previous metasurfaces with single structural regulation, a kind of bifunctional chiral metasurface based on 3D bended asymmetric construction is proposed, which shows giant CD combined with asymmetric chirality at 5.2 mu m. The bended metasurface with abundant spatial freedom, consisting of an array of asymmetric bended split ring resonators (SRRs), can be built up from the tensile stress induced by focused ion beam (FIB)-matter interaction. The results show that the CD increases with the bending angle of the metasurface and reaches a maximum at a bending angle of 60 degrees. Particularly, it is found that the CD is 0.71/0.85 (experiment/simulation) for the backward incidence but -0.29/-0.29 for the forward incidence, indicating that the giant CD and asymmetric chirality properties are realized simultaneously in the same metasurface. The calculated results of near-field distribution and the electric/magnetic dipoles show that the giant CD and the asymmetric chirality come from p ->.m ->not equal 0 and |p -> xm ->| not equal 0, respectively. The findings inspire a high efficiency approach to design multifunctional chiral optical devices.
AB - Chiral metasurfaces offer crucial opportunities to expand the application potential for chiral photonics, but its desired freely structural control and giant circular dichroism (CD) allow for more and greater challenges. Here, different from previous metasurfaces with single structural regulation, a kind of bifunctional chiral metasurface based on 3D bended asymmetric construction is proposed, which shows giant CD combined with asymmetric chirality at 5.2 mu m. The bended metasurface with abundant spatial freedom, consisting of an array of asymmetric bended split ring resonators (SRRs), can be built up from the tensile stress induced by focused ion beam (FIB)-matter interaction. The results show that the CD increases with the bending angle of the metasurface and reaches a maximum at a bending angle of 60 degrees. Particularly, it is found that the CD is 0.71/0.85 (experiment/simulation) for the backward incidence but -0.29/-0.29 for the forward incidence, indicating that the giant CD and asymmetric chirality properties are realized simultaneously in the same metasurface. The calculated results of near-field distribution and the electric/magnetic dipoles show that the giant CD and the asymmetric chirality come from p ->.m ->not equal 0 and |p -> xm ->| not equal 0, respectively. The findings inspire a high efficiency approach to design multifunctional chiral optical devices.
KW - 3D metasurfaces
KW - asymmetric chirality
KW - bended micro‐
KW - configurations
KW - electric resonance
KW - magnetic resonance
KW - giant circular dichroism
KW - ORIGIN
U2 - 10.1002/adfm.202100689
DO - 10.1002/adfm.202100689
M3 - Journal article
VL - 31
JO - Advanced Functional Materials
JF - Advanced Functional Materials
SN - 1616-301X
IS - 31
M1 - 2100689
ER -
ID: 262897703