Настройка нелинейных оптических свойств 1-мерной экситонной системы квантовых точек GaAs c полупараболическим потенциалом с подробным сравнением с экспериментальными результатами: влияние гидростатического давления и температуры

Настоящее исследование посвящено изучению влияния температуры и гидростатического давления на коэффициент поглощения и показатель преломления одномерных полупараболических экситонных квантовых точек GaAs с применением формализма компактной матрицы плотности. Расчеты проводятся для получения волновых функций и энергий экситонных состояний в режиме сильного ограничения с использованием приближения эффективной массы. Значительная зависимость нелинейного оптического показателя преломления и коэффициента поглощения от гидростатического давления и температуры может наблюдаться для экситонного и безэкситонного случая. Наши исследования показывают, что синие/красные сдвиги пиков существенны, когда учитываются экситонные взаимодействия. Противоположные эффекты, вызванные температурой и давлением, имеют существенное практическое значение, поскольку они расширяют альтернативный подход к настройке и управлению оптическими частотами, возникающими в результате переходов. Сравнительный анализ аналитических оптических свойств экситонной системы облегчает экспериментальную идентификацию этих переходов, которые часто близки. Мы попытались сравнить коэффициент поглощения, полученный в настоящей работе, с экспериментальными данными при T ≅ 10 К и 100 К и обнаружили, что теоретическое предсказание согласуется для T ≅ 10 К и немного отклоняется от экспериментальных данных для более высоких температур. Все эти выводы могут иметь широкие последствия для будущего проектирования оптоэлектронных устройств.

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