English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

A theoretical study of the performance of single-mode coupled spontaneousparametric downconversion sources is proposed, which only requires very fewassumptions of practical interest : narrow-bandwidth and quasi-degeneratecollinear generation. Other assumptions like pump beam spatial and temporalenvelopes, target single-mode profile and size, and non-linear susceptibilitydistribution, are only taken into account in the final step of the computation,thus making the theory general and flexible. Figures of merit for performanceinclude absolute collected brightness, pair collection efficiency and heraldingratio. The optimization of these values is investigated through functions thatonly depend on dimensionless parameters, allowing for deducing from the resultsthe best experimental configuration for a whole range of design choices (e.g.crystal length, pump power). A particular application of the theory isvalidated by an experimental optimization obtained under compatibleassumptions. A comparison with other works and proposals for numericallyimplementing the theory in its most generality are also provided.

Optimal photon-pair single mode coupling in narrow-band spontaneous parametric down-conversion with arbitrary pump profile