deletions | additions       diff --git a/figures/neff_ng_TM/caption.tex b/figures/neff_ng_TM/caption.tex  index eddc8ef..fe6ed12 100644  --- a/figures/neff_ng_TM/caption.tex  +++ b/figures/neff_ng_TM/caption.tex 
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Straight waveguide quasi-TM mode (a) Effective index $n_{eff}$ (b) Group index $n_g$ $n_g$. \label{fig:neff_TM}