Author(s): Ren, SL (Ren, Shuliang); Liu, CJ (Liu, Changji); Xu, KX (Xu, Kaixuan); Jiang, N (Jiang, Nai); Hu, FR (Hu, Fangrong); Tan, PH (Tan, Ping-Heng); Zheng, HZ (Zheng, Houzhi); Xu, XL (Xu, Xinlong); Shen, C (Shen, Chao); Zhang, J (Zhang, Jun)

Source: JOURNAL OF PHYSICAL CHEMISTRY LETTERS Volume: 13 Issue: 7 Pages: 1697-1704 DOI: 10.1021/acs.jpclett.1c03944 Published: FEB 24 2022

Abstract: Chiral optical metamaterials have attracted a great deal of attention due to their intriguing properties with respect to fundamental research and practical applications. For metamaterials with achiral structures, the system composed of metamaterials and obliquely incident light has extrinsic chirality and can produce circular dichroism (CD) effect. However, there have been few studies on the azimuth-dependent CD spectra of achiral metamaterials that have greatly improved our understanding of optical phenomena caused by external chirality. In this work, we experimentally studied the azimuth-dependent CD that originated from the extrinsic chirality of the metamaterials in an asymmetric-U shape and a U-bar-shape gold unit structure, separately. We explain the origin of the CD in the coupling of the macroelectric dipole and magnetic dipole, and the simulation results are in good agreement with the experiment. Our results provide a possible way to build an on-chip azimuth sensor based on azimuth-dependent CD spectra of metamaterials.

Accession Number: WOS:000762057800008

PubMed ID: 35156806

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

TAN, Ping-Heng D-1137-2009 0000-0001-6575-1516

Shen, Chao J-1406-2017 0000-0002-3664-4874

Zhang, Jun 0000-0002-9831-6796

ISSN: 1948-7185

Full Text: https://pubs.acs.org/doi/10.1021/acs.jpclett.1c03944