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Dokumenttyp:
Zeitschriftenaufsatz 
Autor(en):
Della Sala, F.; Di Carlo, A.; Lugli, P.; Bernardini, F.A. 
Titel:
Free-carrier screening of polarization fields in wurtzite GaN/InGaN laser structures 
Abstract:
The free-carrier screening of macroscopic polarization fields in wurtzite GaN/InGaN quantum well lasers is investigated via a self-consistent tight-binding approach. We show that the high carrier concentrations found experimentally in nitride laser structures effectively screen the built-in spontaneous and piezoelectricpolarization fields, thus inducing a “field-free” band profile. Our results explain some heretofore puzzling experimental data on nitride lasers, such as the unusually high lasing...    »
 
Stichworte:
Polarization Blue shift Carrier density Piezoelectric effects Piezoelectric fields 
Zeitschriftentitel:
Appl. Phys. Lett. 74, 2002 (1999) 
Jahr:
1999 
Sprache:
en 
Verlag / Institution:
American Physical Society.