High‐Order Multipolar Excitations Governing Circular Dichroism in an All‐Dielectric Chiral Metasurface
Chien‐Feng Chien, Hsiu‐Ping Su, Yu‐Tsung Lin, Shu‐Fei Ho, Pin Chieh Wu · 2026
Read High‐Order Multipolar Excitations Governing Circular Dichroism in an All‐Dielectric Chiral Metasurface by Chien‐Feng Chien, Hsiu‐Ping Su, Yu‐Tsung Lin, Shu‐Fei Ho, Pin Chieh Wu (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-13642064.txt.
Description
Chien-Feng Chien led a 2026 study of an all-dielectric chiral metasurface that twists light strongly in the visible range through high-order multipolar resonances. Natural chiral materials show only weak circular dichroism, the different response to left- and right-handed circularly polarized light, because light-matter coupling at tiny scales is inefficient. The team broke the mirror symmetry of a gammadion-shaped unit cell, building a low-loss array whose resonances concentrate fields sharply.
Simulations and experiments found two strong response peaks near 652 and 735 nanometers, exceeding 50 percent and 40 percent respectively. Multipole analysis traced the stronger peak to selective excitation of high-order electric and magnetic modes under right-handed light, creating a large scattering imbalance and local chiral fields. The quadrupole-dominated peak also held up well at oblique angles. The work gives rules linking asymmetry, multi-mode excitation, and robust chiral response in low-loss devices.
Catalog record
| CREATOR | Chien‐Feng Chien, Hsiu‐Ping Su, Yu‐Tsung Lin, Shu‐Fei Ho, Pin Chieh Wu |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 37 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |