Fig. 15

a The mode real part of neff versus nr for the four-layer WSe2 nanosheet. And the inset is the electric field distribution of the mode with neff of 1.4550619. b Dependence of output electric energy on nr for the four-layer WSe2 nanosheet
a The mode real part of neff versus nr for the four-layer WSe2 nanosheet. And the inset is the electric field distribution of the mode with neff of 1.4550619. b Dependence of output electric energy on nr for the four-layer WSe2 nanosheet