Landau-phonon polaritons in Dirac heterostructures
Polaritons are light-matter quasiparticles that govern the optical response of quantum materials at the nanoscale, enabling on-chip communication and local sensing. Here, we report Landau-phonon polaritons (LPPs) in magnetized charge-neutral graphene encapsulated in hexagonal boron nitride (hBN). These quasiparticles emerge from the interaction of Dirac magnetoexciton modes in graphene with the hyperbolic phonon polariton modes in hBN. Using infrared magneto-nanoscopy, we reveal the ability to completely halt the LPP propagation in real space at quantized magnetic fields, defying the conventional optical selection rules. The LPP-based nanoscopy also tells apart two fundamental many-body phenomena: the Fermi velocity renormalization and field-dependent magnetoexciton binding energies. Our results highlight the potential of magnetically tuned Dirac heterostructures for precise nanoscale control and sensing of light-matter interaction.
Authors
- Mengkun Liu (ORCID: https://orcid.org/0000-0002-3512-9133)
- Lukas Wehmeier (ORCID: https://orcid.org/0000-0001-8416-953X)
- Alexey B. Kuzmenko (ORCID: https://orcid.org/0000-0001-9574-6435)
- Michael Dapolito (ORCID: https://orcid.org/0000-0002-1807-7271)
- Zijian Zhou (ORCID: https://orcid.org/0000-0003-2383-8490)
- Takashi Taniguchi (ORCID: https://orcid.org/0000-0002-1467-3105)
- Ran Jing (ORCID: https://orcid.org/0000-0002-0358-6831)
- Kenji Watanabe (ORCID: https://orcid.org/0000-0003-3701-8119)
- A. Gozar (ORCID: https://orcid.org/0000-0002-3233-0990)
- Makoto Tsuneto (ORCID: https://orcid.org/0000-0003-3908-3803)
- Brian Vermilyea
- Suheng Xu (ORCID: https://orcid.org/0000-0002-1456-5489)
- Rafael Mayer (ORCID: https://orcid.org/0000-0001-5367-9748)
- Xu Du (ORCID: https://orcid.org/0000-0001-5610-2338)
- M. M. Fogler (ORCID: https://orcid.org/0000-0001-8239-7221)
- Rui Pu (ORCID: https://orcid.org/0000-0003-3366-739X)
- G. L. Carr (ORCID: https://orcid.org/0000-0001-5478-964X)
- Qiang Li (ORCID: https://orcid.org/0000-0002-1230-4832)
- Xinzhong Chen (ORCID: https://orcid.org/0000-0002-6103-3848)
- Wenjun Zheng (ORCID: https://orcid.org/0009-0000-0380-8329)
- Zengyi Du (ORCID: https://orcid.org/0000-0003-3189-0301)
- D. N. Basov
Institutions
- University of Geneva (CH)
- Fairfield University (US)
- Brookhaven National Laboratory (US)
- National Institute for Materials Science (JP)
- Yale University (US)
- University of California San Diego (US)
- Stony Brook University (US)
- Columbia University (US)
Publication Details
- Journal
- Science Advances
- Published
- 2024-09-13
- DOI
- https://doi.org/10.1126/sciadv.adp3487
- Citations
- 20
- Primary Topic
- Plasmonic and Surface Plasmon Research
- Type
- article
- Field-Weighted Citation Impact
- 3.69
Funders
- U.S. Department of Energy
- Office of Science
- Laboratório Nacional de Luz Síncrotron
- Basic Energy Sciences