Multiphoton propagation eigenmodes for sum-frequency generation
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In linear optics, modes correspond to a set of fields that are mutually orthogonal, however, in the nonlinear regime the principle of linear superposition is no longer valid and consequently, the method of mode decomposition breaks down. This is the case when considering sum-frequency generation in a nonlinear crystal. Here, we use the non-depleting pump approximation to describe the nonlinear interaction with low-intensity multiphoton fields. We show that the description of multiphoton fields using the propagation eigenmodes simplifies the Fock state quantum behaviour of the system while remaining equivalent to the standard approach.
Docherty-Walthew , G , Ballantine , K & Mazilu , M 2020 , ' Multiphoton propagation eigenmodes for sum-frequency generation ' , Optics Communications , vol. 466 , 125610 . https://doi.org/10.1016/j.optcom.2020.125610
Copyright © 2020 Elsevier B.V. All rights reserved. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.optcom.2020.125610
DescriptionFunding: UK Engineering and Physical Sciences Research Council (EPSRC) Grant EP/M000869/1 (M.M.).
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