Spectral Diffusion of Ultra-Narrow Fluorescence Spectra in Single Quantum Dots

1996 ◽  
Vol 452 ◽  
Author(s):  
S. A. Empedocles ◽  
D. J. Norris ◽  
M. G. Bawendi
Keyword(s):  
Quantum Dots ◽  
Excited State ◽  
Fluorescence Spectra ◽  
Room Temperature ◽  
Spectral Diffusion ◽  
Single Quantum ◽  
Acoustic Phonons ◽  
Single Quantum Dots

AbstractWe collect and spectrally resolve photoluminescence from single CdSe nanocrystallite quantum dots. By eliminating spectral inhomogeneities, we reveal resolution limited linewidths < 120μev at 10K. These lines are more than fifty times narrower than what has previously been reported using ensemble measurements. Light driven spectral diffusion is seen as a form of power broadening and may be the cause of surprisingly broad linewidths at room temperature. In addition, we see no evidence of excited state emission or coupling to acoustic phonons.

Однофотонное излучение одиночной квантовой точки CdTeSe/ZnS в ближнем инфракрасном диапазоне при комнатной температуре

2021 ◽  
Vol 47 (21) ◽  
pp. 3
Author(s):  
Siyue Jin ◽  
Xingsheng Xu
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Auger Recombination ◽  
Single Photon ◽  
Irradiation Time ◽  
Colloidal Quantum Dots ◽  
Single Quantum ◽  
Illumination Time ◽  
Single Quantum Dots ◽  
Single Quantum Dot

In this study, the photostability of a CdTeSe/ZnS colloidal single photon emitter with a wavelength of 800nm at room temperature was investigated. The second-order correlation function was much smaller than 0.1, which proved that the CdTeSe/ZnS single quantum dot at 800nm is a highly pure single-photon emitter. The effects of the irradiation time on the optical properties from single quantum dots were analyzed. As the illumination time increased, the emission of biexciton and multiexciton in the colloidal quantum dots increased, and the occurrence of Auger recombination increased.

Room temperature emission from CdSe single quantum dots embedded in high bandgap barrier material

2008 ◽  
Vol 40 (6) ◽  
pp. 1938-1940 ◽  
Author(s):  
R. Arians ◽  
T. Kümmell ◽  
G. Bacher ◽  
A. Gust ◽  
C. Kruse ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Single Quantum ◽  
Barrier Material ◽  
Single Quantum Dots

Excited state spectroscopy of excitons in single quantum dots

1995 ◽  
Vol 67 (16) ◽  
pp. 2391-2393 ◽  
Author(s):  
D. Gammon ◽  
E. S. Snow ◽  
D. S. Katzer
Keyword(s):  
Quantum Dots ◽  
Excited State ◽  
Single Quantum ◽  
Single Quantum Dots

scholarly journals Room temperature excitation spectroscopy of single quantum dots

2011 ◽  
Vol 2 ◽  
pp. 516-524 ◽  
Author(s):  
Christian Blum ◽  
Frank Schleifenbaum ◽  
Martijn Stopel ◽  
Sébastien Peter ◽  
Marcus Sackrow ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Single Molecule ◽  
Room Temperature ◽  
Cdse Nanocrystals ◽  
Photoluminescence Excitation ◽  
Single Quantum ◽  
Excitation Spectra ◽  
Detection Scheme ◽  
Single Quantum Dots ◽  
The Individual

We report a single molecule detection scheme to investigate excitation spectra of single emitters at room temperature. We demonstrate the potential of single emitter photoluminescence excitation spectroscopy by recording excitation spectra of single CdSe nanocrystals over a wide spectral range of 100 nm. The spectra exhibit emission intermittency, characteristic of single emitters. We observe large variations in the spectra close to the band edge, which represent the individual heterogeneity of the observed quantum dots. We also find specific excitation wavelengths for which the single quantum dots analyzed show an increased propensity for a transition to a long-lived dark state. We expect that the additional capability of recording excitation spectra at room temperature from single emitters will enable insights into the photophysics of emitters that so far have remained inaccessible.

scholarly journals Biexciton Binding Energy and Line width of Single Quantum Dots at Room Temperature

Nano Letters ◽  
2021 ◽  
Author(s):  
Sander J. W. Vonk ◽  
Bart A. J. Heemskerk ◽  
Robert C. Keitel ◽  
Stijn O. M. Hinterding ◽  
Jaco J. Geuchies ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Binding Energy ◽  
Line Width ◽  
Room Temperature ◽  
Single Quantum ◽  
Single Quantum Dots ◽  
Biexciton Binding Energy

scholarly journals Biexciton Binding Energy and Linewidth of Single Quantum Dots at Room Temperature

2021 ◽  
Author(s):  
Sander Vonk ◽  
Bart Heemskerk ◽  
Robert Keitel ◽  
Stijn Hinterding ◽  
Jaco Geuchies ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Binding Energy ◽  
Room Temperature ◽  
Single Quantum ◽  
Single Quantum Dots ◽  
Biexciton Binding Energy

Room temperature emission from CdSe∕ZnSSe∕MgS single quantum dots

2007 ◽  
Vol 90 (10) ◽  
pp. 101114 ◽  
Author(s):  
R. Arians ◽  
T. Kümmell ◽  
G. Bacher ◽  
A. Gust ◽  
C. Kruse ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Single Quantum ◽  
Single Quantum Dots

Single-photon emission and multi-photon emission from single CdTeSe/ZnS quantum dots at room temperature

2022 ◽  
Author(s):  
Siyue Jin ◽  
Xingsheng Xu
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Near Infrared ◽  
Single Photon ◽  
Photon Emission ◽  
Excitation Power ◽  
Single Quantum ◽  
Single Photon Emission ◽  
Infrared Wavelength ◽  
Single Quantum Dots

Abstract In this report, single-photon emission and ordered multi-photon emission from single colloidal CdTeSe/ZnS quantum dots at near-infrared wavelength were realized at room temperature. The fluorescence lifetime, blinking, and anti-bunching effect of this single quantum dots at different excitation powers were measured. The relationship between the excitation power and the emission of exciton, biexciton and multiexciton of single quantum dots at a wavelength of 800nm was obtained. The physical mechanism of photoluminescence of the single quantum dots was analyzed.

Near-field spectroscopy of single quantum dots at room temperature

2001 ◽  
Vol 202 (1) ◽  
pp. 209-211 ◽  
Author(s):  
K. Ikeda ◽  
K. Matsuda ◽  
H. Saito ◽  
K. Nishi ◽  
T. Saiki
Keyword(s):  
Quantum Dots ◽  
Room Temperature ◽  
Near Field ◽  
Single Quantum ◽  
Field Spectroscopy ◽  
Single Quantum Dots
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