Author(s): Cheng, YQ (Cheng, Yuqing); Zhai, KP (Zhai, Kunpeng); Zhu, NH (Zhu, Ninghua); Sun, MT (Sun, Mengtao)

Source: JOURNAL OF PHYSICS D-APPLIED PHYSICS Volume: 55 Issue: 19 Article Number: 195102 DOI: 10.1088/1361-6463/ac4fd6 Published: MAY 12 2022

Abstract: Optical non-reciprocity is a significant property in numerous applications, ranging from optical telecommunications and optical signal processing to integrated photonics and quantum networks. Here, we theoretically demonstrate passive optical non-reciprocity with multiple modes in the visible range, employing a simple hybrid plasmonic nanostructure, which consists of a metallic cavity waveguide with two groups of gratings on both sides (ports). This structure illustrates high isolation ratios for these modes with values of around 10-30 dB. The maximum isolation ratio is close to 30 dB at the wavelength of 548 nm with the bandwidth of 16 nm. Furthermore, the intensity of the electric field localized inside the waveguide is highly enhanced by about 1 order of magnitude for these resonant modes. Our work presents a novel way for realizing optical non-reciprocity with multiple modes in the visible range, which is helpful forassociated applications.

Accession Number: WOS:000754057600001

Author Identifiers:

Author Web of Science ResearcherID ORCID Number

Cheng, Yuqing 0000-0002-3371-9164

ISSN: 0022-3727

eISSN: 1361-6463

Full Text: https://iopscience.iop.org/article/10.1088/1361-6463/ac4fd6