Exciton quantum beats in GaAs/AlAs disk-shaped quantum dots
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Keywords

exciton quantum beat
disk-shaped quantum dot
GaAs/AlAs

How to Cite

1.
Le TDH, Le TNB, Dinh NT. Exciton quantum beats in GaAs/AlAs disk-shaped quantum dots. hueuni-jns [Internet]. 2023Jun.30 [cited 2024Feb.26];132(1B):5-13. Available from: https://jos.hueuni.edu.vn/index.php/hujos-ns/article/view/6909

Abstract

Using the renormalized wavefunction approach, we examined the excitonic quantum beat in a three-level system in disk-shaped quantum dots. The non-stationary electron wave function and the time-dependent exciton absorption intensity under the effect of an intensity pump laser that resonates with two excited electron states were also provided. Our numerical findings demonstrate that the time-dependent exciton absorption intensity takes the shape of a periodic oscillation when the quantum dot is subjected to a powerful resonant pump laser. This is clear evidence that quantum beats appears in the quantum disk. Additionally, the dot radius and the pump field detuning significantly affect the beat characteristics, such as frequency and amplitude.

https://doi.org/10.26459/hueunijns.v132i1B.6909
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References

  1. Lv Z, Wang Y, Chen J, Wang J, Zhou Y, and Han ST. Semiconductor Quantum Dots for Memories and Neuromorphic Computing Systems. Chemical Reviews.2020;120:3941-4006.
  2. Nozik AJ, Beard MC, Luther JM, Law M, Ellingson RJ, Johnson JC. Semiconductor Quantum Dots and Quantum Dot Arrays and Applications of Multiple Exciton Generation to Third-Generation Photovoltaic Solar Cells. Chemical Reviews. 2010; 110:6873-6890.
  3. Czajkowski G and Silvestri L. Optical properties of Quantum Disks: Real density matrix approach. Central European Journal of Physics. 2006;4:254- 269.
  4. Duque CM, Restrepo RL, Duque CA. Tilted electric field effects on the electronic states in a GaAs quantum disk. Superlattices and Microstructures. 2012;52:1078-1082.
  5. Liu G, Guo K, Wang C. Linear and nonlinear intersubband optical absorption in a disk-shaped quantum dot with a parabolic potential plus an inverse squared potential in a static magnetic field. Physica B: Condensed Matter. 2012;407:2334-2339.
  6. Wei R, Xie W. Optical absorption of a hydrogenic impurity in a disc-shaped quantum dot. Current Applied Physics. 2010;10:757-760.
  7. Xie W. Exciton states in a disk-like quantum dot. Physica B: Condensed Matter. 2000;279:253-256.
  8. Chen CY, Li WS, Teng XY, Liang SD. Polaron in a quantum disk. Physica B: Condensed Matter. 1998; 245:92-102.
  9. Van der Poel WAJA, Severens ALGJ, Foxon CT. Quantum beats in the exciton emission of type II GaAs/AlAs quantum wells. Optics Communications. 1990;76:116-120.
  10. Nuss MC, Planken PCM, Brener I, Roskos HG, Luo MSC, Chuang SL. Terahertz electromagnetic radiation from quantum wells. Applied Physics B Laser and Optics. 1994;58:249-259.
  11. Planken PCM, Nuss MC, Brener I, Goossen KW, Luo MSC, Chuang SL, Pfeiffer L. Terahertz emission in single quantum wells after coherent optical excitation of light hole and heavy hole excitons. Physical Review Letters. 1992;69:3800-3803.
  12. Kojima O, Miyagawa A, Kita T, Wada O, Isu T. Ultrafast All-Optical Control of Excitons Confined in GaAs Thin Films. Applied Physics Express. 2008;1(11):112401.
  13. Haroche S. Quantum beats and time-resolved fluorescence spectroscopy. High-Resolution Laser Spectroscopy. 1976;253-313.
  14. Pantke KH, Schillak P, Erland J, Lyssenko VG, Razbirin BS, Hvam JM. Nonlinear Quantum Beats of Excitons in CdSe. Physica Status Solidi (b). 1992;173:91-98.
  15. Luo MSC, Chuang SL, Planken PCM, Brener I, Nuss MC. Coherent double-pulse control of quantum beats in a coupled quantum well. Physical Review B. 1993;48:11043-11050.
  16. Bobrysheva AI, Shmiglyuk MI, Pavlov VG. Optical exciton Stark effect and quantum beats at exciton quasienergy levels in quantum wells. Physics of the Solid State. 1997;39:1147-1149.
  17. Thao DN, Bao LTN. Quantum Beat of Excitons in Spherical Semiconductor Quantum Dots. Superlattices and Microstructures. 2020;146:106675.
  18. Phuoc DD, Bao LTN, Hien LTD, Hieu HK, Thao DN. A Study on Quantum Beats of Excitons in GaAs/AlGaAs Circular Cylindrical Quantum Wires. Japanese Journal of Apllied Physics. 2020; 59:125003.
  19. Bao LTN, Phuoc DD, Hien LTD, Thao DN. Quantum Beats of Excitons in the Prolate Ellipsoidal Quantum Dots. Journal of Nanomaterial. 2022; 2022:1-14.
  20. Sangalli D, Perfetto E, Stefanucci G, and Marini A. An ab-initio approach to describe coherent and non-coherent exciton dynamics. The European Physical Journal B. 2018;91:171.
  21. Rustagi A, Kemper AF. Coherent excitonic quantum beats in time-resolved photoemission measurements. Physical Review B. 2019;99:125303.
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