Microwave analog of Stern-Gerlach effects using nonuniform chiral metamaterials

Satoshi Tomita, Kei Sawada, Shotaro Nagai, Atsushi Sanada, Nobuyuki Hisamoto, Tetsuya Ueda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


This study observes microwave beam splitting dependent on circular polarizations through nonuniform chiral metamaterials. Nonuniform chiral metamaterials with a gradation in refractive index are constructed using chiral meta-atoms that exhibit optical activities at microwave frequencies. Microwave scattering far-field patterns by the nonuniform chiral metamaterials demonstrate a deflection of microwaves, which transmit in a direction perpendicular to the refractive index gradient. Furthermore, circularly polarized microwaves with opposite "spins of light" go their separate ways in the nonuniform chiral metamaterials. This phenomenon is an optical analog of the Stern-Gerlach effects for electrons.

Original languageEnglish
Article number165425
JournalPhysical Review B
Issue number16
Publication statusPublished - 2017 Oct 13
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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