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/

Global: Zendy Plus annual

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

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present an inverse design approach to significantly improve thefigures-of-merit for chiral photon elements and quantum emitters in topologicalphotonic crystal slab waveguides. Beginning with a topological waveguide modewith a group index of approximately 10 and a maximum forwards or backwardsPurcell factor at a chiral point of less than 0.5, we perform optimizations ofthe directional Purcell factor. We use a fully three dimensional guided-modeexpansion method to efficiently calculate waveguide band dispersion propertiesand modes, while automatic differentiation is employed to calculate thegradient of objective functions. We present two example improved designs: (i) atopological mode with an accessible group index of approximately 30 and amaximum unidirectional Purcell factor at a chiral point greater then 4.5representing a nearly 10-fold improvement to the Purcell factor, and (ii) aslow light mode, well away from the Brillouin zone edge with a group indexgreater then 350 and a maximum unidirectional Purcell factor at a chiral pointgreater than 45.

Optimizing the chiral Purcell factor for unidirectional single photon emitters in topological photonic crystal waveguides using inverse design