title: ÐÐ»Ð¸ÑÐ½Ð¸Ðµ Ð-Ð¥ ÑÐ¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ñ Ð½Ð° Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÑÑ Ð¾ÑÐ¸ÐµÐ½ÑÐ°ÑÐ¸Ñ Ð¸ Ð²ÑÑÑÑÐ°Ð¸Ð²Ð°Ð½Ð¸Ðµ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð² Ð² ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¾ÑÐºÐ°Ñ (In,Al)As/AlAs
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: The effect of Ð-X mixing on the optical orientation and alignment of excitons in quantum dots (In,Al)As/AlAs
Creators: name: ÐÐ¸ÑÐ°Ð¹Ð»ÐµÐ½ÐºÐ¾, ÐÐ¸Ð½Ð°
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2023
Subjects: ÑÐ¿Ð¸Ð½ÑÑÐ¾Ð½Ð¸ÐºÐ°
ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÐµ ÑÐ¾ÑÐºÐ¸
Ð-Ð¥ ÑÐ¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ðµ
Ð°Ð½Ð¸Ð·Ð¾ÑÑÐ¾Ð¿Ð½Ð¾Ðµ Ð¾Ð±Ð¼ÐµÐ½Ð½Ð¾Ðµ ÑÐ°ÑÑÐµÐ¿Ð»ÐµÐ½Ð¸Ðµ
Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ°Ñ Ð¾ÑÐ¸ÐµÐ½ÑÐ°ÑÐ¸Ñ ÑÐ¿Ð¸Ð½Ð¾Ð²
Ð²ÑÑÑÑÐ°Ð¸Ð²Ð°Ð½Ð¸Ðµ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð²
ÑÐ¾ÑÐ¾Ð»ÑÐ¼Ð¸Ð½ÐµÑÑÐµÐ½ÑÐ¸Ñ
spintronics
quantum dots
Ð-X mixing
anisotropic exchange splitting
optical orientation of spins
alignment of excitons
photoluminescence

description: ÐÐ¾Ð»ÑÐ¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¸ÐºÐ¾Ð²ÑÐµ ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÐµ ÑÐ¾ÑÐºÐ¸ (ÐÐ¢) (In,Al)As/AlAs Ð¸Ð½ÑÐµÑÐµÑÐ½Ñ Ð±Ð¾Ð»ÑÑÐ¸Ð¼ Ð²ÑÐµÐ¼ÐµÐ½ÐµÐ¼ Ð¶Ð¸Ð·Ð½Ð¸ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð², Ð²Ð¾Ð·Ð±ÑÐ¶Ð´ÐµÐ½Ð½ÑÑ Ð² ÐÐ¢, ÑÑÐ¾ Ð´ÐµÐ»Ð°ÐµÑ Ð¸Ñ Ð¿ÐµÑÑÐ¿ÐµÐºÑÐ¸Ð²Ð½ÑÐ¼Ð¸ Ð´Ð»Ñ Ð¿ÑÐ¸Ð¼ÐµÐ½ÐµÐ½Ð¸Ñ Ð² ÑÑÑÑÐ¾Ð¹ÑÑÐ²Ð°Ñ ÑÐ¿Ð¸Ð½ÑÑÐ¾Ð½Ð¸ÐºÐ¸. ÐÐ°Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð¿Ð¾ÑÐ²ÑÑÐµÐ½Ð° Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð°Ð½ÑÐ°Ð¼Ð±Ð»Ñ ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¾ÑÐµÐº (In,Al)As/AlAs Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ Ð-Ð¥ ÑÐ¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ñ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¹ ÑÐºÑÐ¸ÑÐ¾Ð½Ð°. Ð¦ÐµÐ»ÑÑ ÑÐ°Ð±Ð¾ÑÑ ÑÐ²Ð»ÑÐ»Ð¾ÑÑ Ð¸Ð·ÑÑÐµÐ½Ð¸Ðµ Ð²Ð»Ð¸ÑÐ½Ð¸Ñ Ð-Ð¥ ÑÐ¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ñ Ð½Ð° ÑÐ¾Ð½ÐºÑÑ ÑÑÑÑÐºÑÑÑÑ Ð½ÐµÐ¿ÑÑÐ¼ÑÑ Ð² k-Ð¿ÑÐ¾ÑÑÑÐ°Ð½ÑÑÐ²Ðµ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð² Ð² Ð°Ð½ÑÐ°Ð¼Ð±Ð»Ðµ ÐºÐ²Ð°Ð½ÑÐ¾Ð²ÑÑ ÑÐ¾ÑÐµÐº (In,Al)As/AlAs. ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÐ¾Ð²Ð¾Ð´Ð¸Ð»Ð¸ÑÑ Ð¼ÐµÑÐ¾Ð´Ð°Ð¼Ð¸ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¾Ð¹ Ð¾ÑÐ¸ÐµÐ½ÑÐ°ÑÐ¸Ð¸ ÑÐ¿Ð¸Ð½Ð¾Ð² Ð¸ Ð²ÑÑÑÑÐ°Ð¸Ð²Ð°Ð½Ð¸Ñ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð² Ð² Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð¼ Ð¿Ð¾Ð»Ðµ. ÐÐ· Ð¼Ð°Ð³Ð½Ð¸ÑÐ¾Ð¿Ð¾Ð»ÐµÐ²ÑÑ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÐµÐ¹ Ð»Ð¸Ð½ÐµÐ¹Ð½Ð¾- Ð¸ ÑÐ¸ÑÐºÑÐ»ÑÑÐ½Ð¾-Ð¿Ð¾Ð»ÑÑÐ¸Ð·Ð¾Ð²Ð°Ð½Ð½Ð¾Ð¹ ÑÐ¾ÑÐ¾Ð»ÑÐ¼Ð¸Ð½ÐµÑÑÐµÐ½ÑÐ¸Ð¸ Ð±ÑÐ»Ð¸ Ð¾Ð¿ÑÐµÐ´ÐµÐ»ÐµÐ½Ñ Ð²ÐµÐ»Ð¸ÑÐ¸Ð½Ñ Ð°Ð½Ð¸Ð·Ð¾ÑÑÐ¾Ð¿Ð½Ð¾Ð³Ð¾ Ð¾Ð±Ð¼ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¹ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸ Ð°ÐºÑÐ¸Ð²Ð½ÑÑ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð². Ð¡ ÑÐ¾ÑÑÐ¾Ð¼ Ð´Ð»Ð¸Ð½Ñ Ð²Ð¾Ð»Ð½Ñ Ð²Ð¾Ð·Ð±ÑÐ¶Ð´ÐµÐ½Ð¸Ñ Ð½Ð°Ð±Ð»ÑÐ´Ð°Ð»ÑÑ ÑÐ¾ÑÑ Ð²ÐµÐ»Ð¸ÑÐ¸Ð½Ñ ÑÐ°ÑÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ. ÐÐ¢ (In,Al)As/AlAs Ð¿ÑÐµÐ¸Ð¼ÑÑÐµÑÑÐ²ÐµÐ½Ð½Ð¾ Ð½ÐµÐ¿ÑÑÐ¼Ð¾Ð·Ð¾Ð½Ð½ÑÐµ, Ð¾Ð´Ð½Ð°ÐºÐ¾ Ð² Ð¾Ð±Ð»Ð°ÑÑÐ¸ ÑÐ¾ÑÐºÐ¸ Ð Ð¥ Ð¿ÐµÑÐµÑÐµÑÐµÐ½Ð¸Ñ Ð²ÐµÐ»Ð¸ÑÐ¸Ð½Ð° Ð¿Ð¾Ð´Ð¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ñ Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¹ Ð²ÐµÐ»Ð¸ÐºÐ°. Ð ÑÐ°Ð±Ð¾ÑÐµ Ð±ÑÐ»Ð¾ Ð¿Ð¾ÐºÐ°Ð·Ð°Ð½Ð¾, ÑÑÐ¾ Ð¿Ð¾Ð´Ð¼ÐµÑÐ¸Ð²Ð°Ð½Ð¸Ðµ Ð¿ÑÑÐ¼ÑÑ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¹ Ð¼ÐµÐ½ÑÐµÑ ÑÐ¾Ð½ÐºÑÑ ÑÑÑÑÐºÑÑÑÑ Ð¾Ð¿ÑÐ¸ÑÐµÑÐºÐ¸ Ð°ÐºÑÐ¸Ð²Ð½ÑÑ Ð½ÐµÐ¿ÑÑÐ¼ÑÑ Ð² k-Ð¿ÑÐ¾ÑÑÑÐ°Ð½ÑÑÐ²Ðµ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð², Ð¿Ð¾ÑÑÐµÐ´ÑÑÐ²Ð¾Ð¼ ÑÐ²ÐµÐ»Ð¸ÑÐµÐ½Ð¸Ñ Ð°Ð½Ð¸Ð·Ð¾ÑÑÐ¾Ð¿Ð½Ð¾Ð³Ð¾ Ð¾Ð±Ð¼ÐµÐ½Ð½Ð¾Ð³Ð¾ ÑÐ°ÑÑÐµÐ¿Ð»ÐµÐ½Ð¸Ñ ÑÐ½ÐµÑÐ³ÐµÑÐ¸ÑÐµÑÐºÐ¸Ñ ÑÐ¾ÑÑÐ¾ÑÐ½Ð¸Ð¹ ÑÐºÑÐ¸ÑÐ¾Ð½Ð°. Ð Ð¿Ð¾Ð¿ÐµÑÐµÑÐ½Ð¾Ð¼ Ð¼Ð°Ð³Ð½Ð¸ÑÐ½Ð¾Ð¼ Ð¿Ð¾Ð»Ðµ Ð±ÑÐ»Ð° Ð¿Ð¾Ð»ÑÑÐµÐ½Ð° Ð½ÐµÐ¾Ð¶Ð¸Ð´Ð°Ð½Ð½Ð°Ñ Ð½ÐµÐ¼Ð¾Ð½Ð¾ÑÐ¾Ð½Ð½Ð°Ñ Ð·Ð°Ð²Ð¸ÑÐ¸Ð¼Ð¾ÑÑÑ Ð²ÑÑÑÑÐ°Ð¸Ð²Ð°Ð½Ð¸Ñ ÑÐºÑÐ¸ÑÐ¾Ð½Ð¾Ð². Ð ÐµÐ·ÑÐ»ÑÑÐ°ÑÑ ÑÐ°Ð±Ð¾ÑÑ Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ñ ÐºÐ°Ðº Ð² Ð´Ð°Ð»ÑÐ½ÐµÐ¹ÑÐµÐ¼ ÑÑÐ½Ð´Ð°Ð¼ÐµÐ½ÑÐ°Ð»ÑÐ½Ð¾Ð¼ Ð¸ÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ð¸ Ð¿Ð¾Ð»ÑÐ¿ÑÐ¾Ð²Ð¾Ð´Ð½Ð¸ÐºÐ¾Ð²ÑÑ ÐÐ¢, ÑÐ°Ðº Ð¸ Ð² ÑÐ°Ð·ÑÐ°Ð±Ð¾ÑÐºÐµ ÑÑÑÑÐ¾Ð¹ÑÑÐ² ÑÐ¿Ð¸Ð½ÑÑÐ¾Ð½Ð¸ÐºÐ¸.
description: Semiconductor quantum dots (QD) (In,Al)As/AlAs are interesting for long lifetime of excitons, excited in QD, which makes them promising for application in spintronic devices. This work is devoted to the study of ensemble of quantum dots (In,Al)As/AlAs in the area of Ð-X mixing of exciton states. The aim of the work was to study the influence of Ð-X mixing on the fine structure of indirect in k-space excitons in an ensemble of quantum dots (In,Al)As/AlAs. The research was carried out by methods of optical orientation of spins and alignment of excitons in magnetic field. From magneto-field dependences of linearly and circularly polarized photoluminescence have been identified the values of anisotropic exchange splitting of states of optically active excitons. With an increase in the excitation wavelength, an increase in the splitting value was observed. Quantum dots (In,Al)As/AlAs predominantly have the indirect band gap, however in the area of Ð-X crossing the amount of admixing of direct states is significant. In the work it was shown that admixing of direct states changes the fine structure of optically active indirect in k-space excitons, by increasing anisotropic exchange splitting of exciton energy states. In the transverse magnetic field, an unexpected nonmonotonic dependence of the alignment of excitons was obtained.Â  The results of work could be applied in further fundamental research of semiconductor QDs, and in the development of spintronic devices.