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Potential profiles and ground state wave functions of C1 and HH1 of wurtzite InGaN/GaN QWs at the zone center. (a) Rect-QW with In composition of 15%. (b) Tri-QW with a maximum In composition of 25%. The thick lines represent the potential profiles, and the thin lines represent the wave functions. The solid lines and the dash lines correspond to the situation of under no internal field and PZ field, respectively.
(a) Variation in the wave-function overlaps along with an increase in well width. (b) Difference in the C1-HH1 transition energies at the zone center between under PZ field and nonfield.
Optical gain properties of the rect-QW and the tri-QW. (a) Rect-QW under nonfield. (b) Tri-QW under nonfield. (c) Rect-QW under a PZ field of 2 MV/cm. (d) Tri-QW under a PZ field with an extremum of 4.38 MV/cm.
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