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.
| Original language | English |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Pages | 774-784 |
| Number of pages | 11 |
| Volume | 3283 |
| DOIs | |
| Publication status | Published - 1998 |
| Externally published | Yes |
| Event | Physics and Simulation of Optoelectronic Devices VI - San Jose, CA, United States Duration: 1998 Jan 26 → 1998 Jan 26 |
Other
| Other | Physics and Simulation of Optoelectronic Devices VI |
|---|---|
| Country | United States |
| City | San Jose, CA |
| Period | 98/1/26 → 98/1/26 |
Fingerprint
Keywords
- II-VT semiconductors
- Optical properties
- Photoluminescence
- Quantum dots
- Self-assembling
ASJC Scopus subject areas
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Applied Mathematics
- Condensed Matter Physics
Cite this
Optical properties of self-assembled II-VI quantum dots. / Furdyna, J. K.; Lee, Sang Hoon.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 3283 1998. p. 774-784.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Optical properties of self-assembled II-VI quantum dots
AU - Furdyna, J. K.
AU - Lee, Sang Hoon
PY - 1998
Y1 - 1998
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 - Quantum dots
KW - Self-assembling
UR - http://www.scopus.com/inward/record.url?scp=57649116267&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=57649116267&partnerID=8YFLogxK
U2 - 10.1117/12.316731
DO - 10.1117/12.316731
M3 - Conference contribution
AN - SCOPUS:57649116267
VL - 3283
SP - 774
EP - 784
BT - Proceedings of SPIE - The International Society for Optical Engineering
ER -