Mie-coupled bound guided states in nanowire geometric superlattices

Seokhyoung Kim, Kyoung Ho Kim, David J. Hill, Hong Kyu Park, James F. Cahoon

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

All-optical operation holds promise as the future of computing technology, and key components include miniaturized waveguides (WGs) and couplers that control narrow bandwidths. Nanowires (NWs) offer an ideal platform for nanoscale WGs, but their utility has been limited by the lack of a comprehensive coupling scheme with band selectivity. Here, we introduce a NW geometric superlattice (GSL) that allows narrow-band guiding in Si NWs through coupling of a Mie resonance with a bound-guided state (BGS). Periodic diameter modulation creates a Mie-BGS-coupled excitation that manifests as a scattering dark state with a pronounced scattering dip in the Mie resonance. The frequency of the coupled mode, tunable from the visible to near-infrared, is determined by the pitch of the GSL. Using a combined GSL-WG system, we demonstrate spectrally selective guiding and optical switching and sensing at telecommunication wavelengths, highlighting the potential to use NW GSLs for the design of on-chip optical components.

Original languageEnglish
Article number2781
JournalNature Communications
Volume9
Issue number1
DOIs
Publication statusPublished - 2018 Dec 1

Fingerprint

Nanowires
Superlattices
superlattices
nanowires
Waveguides
waveguides
Scattering
Telecommunications
Optical Devices
optical switching
scattering
coupled modes
couplers
Telecommunication
narrowband
telecommunication
platforms
selectivity
chips
Modulation

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Mie-coupled bound guided states in nanowire geometric superlattices. / Kim, Seokhyoung; Kim, Kyoung Ho; Hill, David J.; Park, Hong Kyu; Cahoon, James F.

In: Nature Communications, Vol. 9, No. 1, 2781, 01.12.2018.

Research output: Contribution to journalArticle

Kim, Seokhyoung ; Kim, Kyoung Ho ; Hill, David J. ; Park, Hong Kyu ; Cahoon, James F. / Mie-coupled bound guided states in nanowire geometric superlattices. In: Nature Communications. 2018 ; Vol. 9, No. 1.
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