Enabling remote quantum emission in 2D semiconductors via porous metallic networks

Jose J. Fonseca (), Andrew L. Yeats, Brandon Blue, Maxim K. Zalalutdinov, Todd Brintlinger, Blake S. Simpkins, Daniel C. Ratchford, James C. Culbertson, Joel Q. Grim, Samuel G. Carter, Masa Ishigami, Rhonda M. Stroud, Cory D. Cress and Jeremy T. Robinson ()
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Jose J. Fonseca: U.S. Naval Research Laboratory
Andrew L. Yeats: U.S. Naval Research Laboratory
Brandon Blue: University of Central Florida
Maxim K. Zalalutdinov: U.S. Naval Research Laboratory
Todd Brintlinger: U.S. Naval Research Laboratory
Blake S. Simpkins: U.S. Naval Research Laboratory
Daniel C. Ratchford: U.S. Naval Research Laboratory
James C. Culbertson: U.S. Naval Research Laboratory
Joel Q. Grim: U.S. Naval Research Laboratory
Samuel G. Carter: U.S. Naval Research Laboratory
Masa Ishigami: University of Central Florida
Rhonda M. Stroud: U.S. Naval Research Laboratory
Cory D. Cress: U.S. Naval Research Laboratory
Jeremy T. Robinson: U.S. Naval Research Laboratory

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: Abstract Here we report how two-dimensional crystal (2DC) overlayers influence the recrystallization of relatively thick metal films and the subsequent synergetic benefits this provides for coupling surface plasmon-polaritons (SPPs) to photon emission in 2D semiconductors. We show that annealing 2DC/Au films on SiO2 results in a reverse epitaxial process where initially nanocrystalline Au films gain texture, crystallographically orient with the 2D crystal overlayer, and form an oriented porous metallic network (OPEN) structure in which the 2DC can suspend above or coat the inside of the metal pores. Both laser excitation and exciton recombination in the 2DC semiconductor launch propagating SPPs in the OPEN film. Energy in-/out- coupling occurs at metal pore sites, alleviating the need for dielectric spacers between the metal and 2DC layer. At low temperatures, single-photon emitters (SPEs) are present across an OPEN-WSe2 film, and we demonstrate remote SPP-mediated excitation of SPEs at a distance of 17 μm.

Date: 2020
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DOI: 10.1038/s41467-019-13857-0

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