Plasmonic-excitonic nonlinear metasurface engineered from toroidal plasmons and 2D-MoSe

POSTER

Abstract

Two-dimensional transition metal dichalcogenides (TMDCs) are materials of extreme interest for the development of nonlinear optoelectronic devices due to their atomic thickness and strong optical nonlinearities. We integrated a plasmonic metasurface device with the TMDC 2D- MoSe2 to achieve enhancement of higher-order generation mediated by the nanostructures and study the hybridization of toroidal plasmons and 2D excitons within this system. To engineer this integrated platform, we designed a metasurface consisting of arrays of gold nanoresonators with a toroidal dipole magnetic moment and lithographically patterned this metasurface atop monolayer MoSe2 using e-beam lithography. Optical reflectivity and harmonic generation measurements show enhanced linear and nonlinear interactions of this hybrid metasurface.

*Research was sponsored by the Air Force Office of Scientific Research and was accomplished under Grant Number W911NF-23-1-0156. Support for this project was provided by a PSC-CUNY Award, jointly funded by The Professional Staff Congress and The City University of New York.

Presenters

  • Sarah Elghazoly

    • Queens College, City University of New York

Authors

  • Sarah Elghazoly

    • Queens College, City University of New York

  • Abdulsalam Ighile

    • Queens College, City University of New York

  • Aron Rezene

    • Queens College, City University of New York

  • Euclides Almeida

    • Queens College, City University of New York, Flushing, NY, USA & The Graduate Center of the City University of New York, New York, NY