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Constraints on downconversion in atomically thick films

Marini, Loris; Helt, L. G.; Lu, Yuerui; Eggleton, Benjamin J.; Palomba, Stefano


Spontaneous parametric downconversion (SPDC) has been predicted in atomically thick crystals, though not yet observed. In this work we uncover physical and experimental constraints of photon-pair generation in such planar nonlinear films with a free-space illumination/collection geometry. We measure the material nonlinear response of monolayer tungsten diselenide via second harmonic generation and subsequently calculate the expected SPDC efficiency from appropriate quantum-classical relations....[Show more]

CollectionsANU Research Publications
Date published: 2018
Type: Journal article
Source: Journal of the Optical Society of America B
DOI: 10.1364/JOSAB.35.000672


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