Abstract
| Original language | English |
|---|---|
| Title of host publication | European Quantum Electronics Conference, EQEC 2009 |
| Publisher | Optical Society of America |
| ISBN (Print) | 9781424440801 |
| DOIs | |
| Publication status | Published - 1 Jan 2009 |
| Event | 11th European Quantum Electronics Conference, EQEC 2009 - Munich, Germany Duration: 14 Jun 2009 → 19 Jun 2009 Conference number: 11 http://2009.cleoeurope.org/ |
Publication series
| Name | Optics InfoBase Conference Papers |
|---|---|
| ISSN (Electronic) | 2162-2701 |
Conference
| Conference | 11th European Quantum Electronics Conference, EQEC 2009 |
|---|---|
| Abbreviated title | EQEC 2009 |
| Country | Germany |
| City | Munich |
| Period | 14/06/09 → 19/06/09 |
| Internet address |
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Size dependent oscillator strength of CdSe quantum dots determined by nanophotonic control. / Leistikow, M. D.; Johansen, J.; Kettelarij, A. J.; Lodahl, P.; Vos, W. L.
European Quantum Electronics Conference, EQEC 2009. Optical Society of America, 2009. (Optics InfoBase Conference Papers).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review
TY - GEN
T1 - Size dependent oscillator strength of CdSe quantum dots determined by nanophotonic control
AU - Leistikow, M. D.
AU - Johansen, J.
AU - Kettelarij, A. J.
AU - Lodahl, P.
AU - Vos, W. L.
PY - 2009/1/1
Y1 - 2009/1/1
N2 - Control over spontaneous emission of quantum dots is important for many applications, especially as light sources in photonic materials and nanostructures. Colloidal CdSe quantum dots have recently generated enormous interest because of the tunability of their emission energy with particle diameter over the entire visible range. The strength of the interaction of a quantum dot with the light field is determined by the oscillator strength, making the oscillator strength a crucial parameter for successful inhibition and enhancement of spontaneous emission. This paper presents measurements of the oscillator strength and quantum efficiency of ensembles of colloidal CdSe quantum dots as a function of emission energy or equivalently quantum dot size. It is the first time the oscillator strength is determined from emission, giving highly accurate values that can be used to test theories. The total decay rate is measured as a function of normalised LDOS for different sizes of quantum dots in our ensemble. A linear relation between total decay rate and LDOS is found, as expected from Fermi's golden rule. The total decay rate increases with emission energy, in agreement with recent literature. This increase is mostly due to an increase in nonradiative decay rate. The oscillator strength is nearly independent on emission energy suggesting that the quantum dots are in the strong confinement regime.
AB - Control over spontaneous emission of quantum dots is important for many applications, especially as light sources in photonic materials and nanostructures. Colloidal CdSe quantum dots have recently generated enormous interest because of the tunability of their emission energy with particle diameter over the entire visible range. The strength of the interaction of a quantum dot with the light field is determined by the oscillator strength, making the oscillator strength a crucial parameter for successful inhibition and enhancement of spontaneous emission. This paper presents measurements of the oscillator strength and quantum efficiency of ensembles of colloidal CdSe quantum dots as a function of emission energy or equivalently quantum dot size. It is the first time the oscillator strength is determined from emission, giving highly accurate values that can be used to test theories. The total decay rate is measured as a function of normalised LDOS for different sizes of quantum dots in our ensemble. A linear relation between total decay rate and LDOS is found, as expected from Fermi's golden rule. The total decay rate increases with emission energy, in agreement with recent literature. This increase is mostly due to an increase in nonradiative decay rate. The oscillator strength is nearly independent on emission energy suggesting that the quantum dots are in the strong confinement regime.
UR - http://www.scopus.com/inward/record.url?scp=84898023157&partnerID=8YFLogxK
U2 - 10.1109/CLEOE-EQEC.2009.5192115
DO - 10.1109/CLEOE-EQEC.2009.5192115
M3 - Conference contribution
SN - 9781424440801
T3 - Optics InfoBase Conference Papers
BT - European Quantum Electronics Conference, EQEC 2009
PB - Optical Society of America
ER -