Optical properties of self-assembled II-VI quantum dots
J. K. Furdyna, S. Lee
We discuss optical properties of self-assembled CdSe-based quantum dots (QDs) studied by photoluminescence (PL), selective PL, PL excitation, and magneto-PL in our laboratory as well as by other groups. Our own QD specimens were fabricated by depositing approximately 3 monolayers of CdSe on ZnSe using MBE. Samples consisting of capped QDs showed intense excitonic transitions from the QD ensemble. The PL spectra were strongly inhomogeneously broadened, but survived to relatively high temperatures without further broadening of the PL line. Selective PL showed clear LO- phonon resonances which - together with the observed temperature stability of the PL band - clearly indicate that the broad band is a superposition of atomic-like spectra emitted by strongly localized excitons. In addition to CdSe QDs on ZnSe, we also studied magneto-PL of QD systems involving diluted magnetic semiconductors (DMSs), in an attempt to determine the degree of exciton localization in the dots. While these experiments are still inconclusive, the results - and particularly the observation of a dramatic magnetic-field-induced enhancement of PL intensity in DMS based systems - are extremely interesting in their own right, and will also be discussed.
Proceedings of SPIE - The International Society for Optical Engineering
Physics and Simulation of Optoelectronic Devices VI - San Jose, CA, United States
Duration: 1998 Jan 26 → 1998 Jan 26
II-VT semiconductors
Photoluminescence
Self-assembling
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Furdyna, J. K., & Lee, S. (1998). Optical properties of self-assembled II-VI quantum dots. Proceedings of SPIE - The International Society for Optical Engineering, 3283, 774-784. https://doi.org/10.1117/12.316731
Optical properties of self-assembled II-VI quantum dots. / Furdyna, J. K.; Lee, S.
In: Proceedings of SPIE - The International Society for Optical Engineering, Vol. 3283, 1998, p. 774-784.
Furdyna, JK & Lee, S 1998, 'Optical properties of self-assembled II-VI quantum dots', Proceedings of SPIE - The International Society for Optical Engineering, vol. 3283, pp. 774-784. https://doi.org/10.1117/12.316731
Furdyna JK, Lee S. Optical properties of self-assembled II-VI quantum dots. Proceedings of SPIE - The International Society for Optical Engineering. 1998;3283:774-784. https://doi.org/10.1117/12.316731
Furdyna, J. K. ; Lee, S. / Optical properties of self-assembled II-VI quantum dots. In: Proceedings of SPIE - The International Society for Optical Engineering. 1998 ; Vol. 3283. pp. 774-784.
@article{6b376ffaa2ff4cac853782c4ba67136c,
title = "Optical properties of self-assembled II-VI quantum dots",
abstract = "We discuss optical properties of self-assembled CdSe-based quantum dots (QDs) studied by photoluminescence (PL), selective PL, PL excitation, and magneto-PL in our laboratory as well as by other groups. Our own QD specimens were fabricated by depositing approximately 3 monolayers of CdSe on ZnSe using MBE. Samples consisting of capped QDs showed intense excitonic transitions from the QD ensemble. The PL spectra were strongly inhomogeneously broadened, but survived to relatively high temperatures without further broadening of the PL line. Selective PL showed clear LO- phonon resonances which - together with the observed temperature stability of the PL band - clearly indicate that the broad band is a superposition of atomic-like spectra emitted by strongly localized excitons. In addition to CdSe QDs on ZnSe, we also studied magneto-PL of QD systems involving diluted magnetic semiconductors (DMSs), in an attempt to determine the degree of exciton localization in the dots. While these experiments are still inconclusive, the results - and particularly the observation of a dramatic magnetic-field-induced enhancement of PL intensity in DMS based systems - are extremely interesting in their own right, and will also be discussed.",
keywords = "II-VT semiconductors, Optical properties, Photoluminescence, Quantum dots, Self-assembling",
author = "Furdyna, {J. K.} and S. Lee",
journal = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
note = "Physics and Simulation of Optoelectronic Devices VI ; Conference date: 26-01-1998 Through 26-01-1998",
T1 - Optical properties of self-assembled II-VI quantum dots
AU - Furdyna, J. K.
AU - Lee, S.
N2 - We discuss optical properties of self-assembled CdSe-based quantum dots (QDs) studied by photoluminescence (PL), selective PL, PL excitation, and magneto-PL in our laboratory as well as by other groups. Our own QD specimens were fabricated by depositing approximately 3 monolayers of CdSe on ZnSe using MBE. Samples consisting of capped QDs showed intense excitonic transitions from the QD ensemble. The PL spectra were strongly inhomogeneously broadened, but survived to relatively high temperatures without further broadening of the PL line. Selective PL showed clear LO- phonon resonances which - together with the observed temperature stability of the PL band - clearly indicate that the broad band is a superposition of atomic-like spectra emitted by strongly localized excitons. In addition to CdSe QDs on ZnSe, we also studied magneto-PL of QD systems involving diluted magnetic semiconductors (DMSs), in an attempt to determine the degree of exciton localization in the dots. While these experiments are still inconclusive, the results - and particularly the observation of a dramatic magnetic-field-induced enhancement of PL intensity in DMS based systems - are extremely interesting in their own right, and will also be discussed.
AB - We discuss optical properties of self-assembled CdSe-based quantum dots (QDs) studied by photoluminescence (PL), selective PL, PL excitation, and magneto-PL in our laboratory as well as by other groups. Our own QD specimens were fabricated by depositing approximately 3 monolayers of CdSe on ZnSe using MBE. Samples consisting of capped QDs showed intense excitonic transitions from the QD ensemble. The PL spectra were strongly inhomogeneously broadened, but survived to relatively high temperatures without further broadening of the PL line. Selective PL showed clear LO- phonon resonances which - together with the observed temperature stability of the PL band - clearly indicate that the broad band is a superposition of atomic-like spectra emitted by strongly localized excitons. In addition to CdSe QDs on ZnSe, we also studied magneto-PL of QD systems involving diluted magnetic semiconductors (DMSs), in an attempt to determine the degree of exciton localization in the dots. While these experiments are still inconclusive, the results - and particularly the observation of a dramatic magnetic-field-induced enhancement of PL intensity in DMS based systems - are extremely interesting in their own right, and will also be discussed.
KW - II-VT semiconductors
KW - Optical properties
KW - Photoluminescence
KW - Self-assembling
JO - Proceedings of SPIE - The International Society for Optical Engineering
JF - Proceedings of SPIE - The International Society for Optical Engineering
T2 - Physics and Simulation of Optoelectronic Devices VI
Y2 - 26 January 1998 through 26 January 1998