Optical memory concepts with self-organized quantum dots- material systems and energy-selective charging

C. Kapteyn; J. Ehehalt; R. Heitz; Dieter Bimberg; G. E. Cirlin; Victor M. Ustinov; N. N. Ledentsov

doi:10.1117/12.513858

11 June 2003 Optical memory concepts with self-organized quantum dots-material systems and energy-selective charging

C. Kapteyn, J. Ehehalt, R. Heitz, Dieter Bimberg, G. E. Cirlin, Victor M. Ustinov, N. N. Ledentsov

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.513858
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

Abstract

For memory structures based on optically induced charge in self-organized quantum dots, the concept of wavelength-domain multiplexing in the quantum dot ensemble is an essential prerequisite. The electric properties of quantum dots in various material systems as studied by time-resolved capacitance spectroscopy are summarized, and candidates suitable for future memory applications are discussed. By combining optical excitation and capacitance spectroscopy, direct evidence is obtained for energy-selective hole charge generation and storage in InAs/GaAs quantum dots. A clear dependence of the activation energy of the emitted holes on the energy of the excitation is observed.

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C. Kapteyn, J. Ehehalt, R. Heitz, Dieter Bimberg, G. E. Cirlin, Victor M. Ustinov, and N. N. Ledentsov "Optical memory concepts with self-organized quantum dots-material systems and energy-selective charging", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); https://doi.org/10.1117/12.513858

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