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The interaction between two-dimensional crystals (2DCs) and metals isubiquitous in 2D material research. Here we report how 2DC overlayers influencethe recrystallization of relatively thick metal films and the subsequentsynergetic benefits this provides for coupling surface plasmon-polaritons(SPPs) to photon emission in 2D semiconductors. We show that annealing 2DC/Aufilms on SiO2 results in a 'reverse epitaxial' process where initiallynanocrystalline Au films become highly textured and in close crystallographicregistry to the 2D crystal overlayer. With continued annealing, the metalunderlayer dewets to form an oriented pore enabled network (OPEN) film in whichthe 2DC overlayer remains suspended above or coats the inside of the metalpores. This OPEN film geometry supports SPPs launched by either direct laserexcitation or by light emitted from the TMD semiconductor itself, where energyin-coupling and out-coupling occurs at the metal pore sites such thatdielectric spacers between the metal and 2DC layer are unnecessary. At lowtemperatures a high density of single-photon emitters (SPEs) is present acrossan OPEN-WSe2 film, and we demonstrate non-local excitation of SPEs at adistance of 17 {\mu}m with minimal loss of photon purity. Our results suggestthe OPEN film geometry is a versatile platform that could facilitate the use oflayered materials in quantum optics systems.

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