Tunable chiral photonic cavity based on multiferroic layers

Vakhtang Jandieri, Ramaz Khomeriki, Koki Watanabe, Daniel Erni, Douglas H. Werner, Jamal Berakdar

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Realization of externally tunable chiral photonic sources and resonators is essential for studying and functionalizing chiral matter. Here, oxide-based stacks of helical multiferroic layers are shown to provide a suitable, electrically-controllable medium to efficiently trap and filter purely chiral photonic fields. Using analytical and rigorous coupled wave numerical methods we simulate the dispersion and scattering characteristics of electromagnetic waves in multiferroic heterostructures. The results evidence that due to scattering from the spin helix texture, only the modes with a particular transverse wavenumber form standing chiral waves in the cavity, whereas all other modes leak out from the resonator. An external static electric field enables a nonvolatile and energy-efficient control of the vector spin chirality associated with the oxide multilayers, which tunes the photonic chirality density in the resonator.

Original languageEnglish (US)
Pages (from-to)26591-26598
Number of pages8
JournalOptics Express
Issue number16
StatePublished - Jul 31 2023

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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