Magnetic Proximity Coupling of Quantum Emitters in WSe2 to van der Waals Ferromagnets

Kamran Shayan, Na Liu, Andrew Cupo, Yichen Ma, Yue Luo, Vincent Meunier, Stefan Strauf

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

The realization of on-chip quantum networks requires tunable quantum states to encode information carriers on them. We show that Cr2Ge2Te6 (CGT) as a van der Waals ferromagnet can enable magnetic proximity coupling to site-controlled quantum emitters in WSe2, giving rise to ultrahigh exciton g factors up to 20 ± 1. By comparing the same site-controlled quantum emitter before and after ferromagnetic proximity coupling, we also demonstrate a technique to directly measure the resulting magnetic exchange field (MEF) strength. Experimentally determined values of MEF up to 1.2 ± 0.2 meV in the saturation regime approach the theoretical limit of 2.1 meV that was determined from density functional theory calculations of the CGT/WSe2 heterostructure. Our work extends the on-chip control of magneto-optical properties of excitons via van der Waals heterostructures to solid-state quantum emitters.

Original languageEnglish (US)
Pages (from-to)7301-7308
Number of pages8
JournalNano letters
Volume19
Issue number10
DOIs
StatePublished - Oct 9 2019

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanical Engineering

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