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One potential solution to this problem may be found by exploiting the newly discovered phenomenon of topological confinement, which has yielded a multimode platform with as many as 60 stable OAM modes in optical fibers. This provides for a plethora of spontaneous four-wave mixing phase matching possibilities enabling control not only over the wavelengths at which the photon pairs can be generated, but also over the shapes of their joint spectral densities, ranging from correlated, uncorrelated, to anti-correlated. This talk will describe recent experiments aimed at the development of compact, single-aperture devices whose biphoton emissions can be engineered to exploit the spatial dimension of light. |
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