Table 1 Comparison of chiral quantum optical waveguide systems including nanobeam (NB), W1-PC, glide-plane nanobeam (GPN), glide-plane waveguide (GPW), and topological Valley-Hall waveguide.

From: Observation of large spontaneous emission rate enhancement of quantum dots in a broken-symmetry slow-light waveguide

 

Device

chiral area (C > 90%)

β-factor

Purcell-factor

NB

28%

83%

1.1

W1

0.8%

99%

2.8

GPN

28%

83%

2.2

GPW

36%

99%

30

Topological valley Hall

21%

57%

0.68

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