Table 2 Dipole matrix elements (in units of the hydrogen Bohr radius a0) for optical transitions between the bands shown in Fig. 5 at the K point for bright excitons A and B, and the dark exciton SFD, under the corresponding polarization
Exciton | Dipole matrix element (a0) | Polarization direction |
|---|---|---|
SFD | \(\left|\langle {u}_{+1,-1/2}^{7,v}| z| {u}_{+1,+1/2}^{9,c}\rangle\right| =0.137\) | z |
A | \(\left|\langle {u}_{+1,-1/2}^{7,v}| x| {u}_{+1,-1/2}^{12,c}\rangle\right| =3.897\) | x (or y) |
B | \(\left|\langle {u}_{+1,+1/2}^{8,v}| x| {u}_{+1,+1/2}^{9,c}\rangle\right| =2.682\) | x (or y) |
