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Long-lived, room-temperature electron spin coherence in colloidal CdS quantum dots
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10.1063/1.3696069
/content/aip/journal/apl/100/12/10.1063/1.3696069
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/12/10.1063/1.3696069
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Absorbance and photoluminescence (PL) spectra for CdS quantum dots. PL is obtained with an excitation wavelength of 400 nm. (b) Faraday rotation as a function of delay time for three different degenerate pump/probe wavelengths as denoted in Fig. 1(a) in a transverse magnetic field of 50 mT. The solid line in (b) is a fit for 503 nm according to Eq. (1).

Image of FIG. 2.
FIG. 2.

(Color online) Time-resolved differential transmission of CdS quantum dots for three different degenerate pump/probe wavelengths as denoted in Fig. 1(a), with the same experimental conditions as for Fig. 1(b). Inset: Time-resolved photoluminescence for three different detection wavelengths, with an excitation wavelength of 460 nm.

Image of FIG. 3.
FIG. 3.

(Color online) Time-resolved Faraday rotation spectra for CdS quantum dots with a degenerate pump/probe wavelength of 503 nm, in a transverse magnetic field of zero and 50 mT, respectively.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Time-resolved Faraday rotation signal for CdS quantum dots with a degenerate pump/probe wavelength of 503 nm, in different transverse magnetic fields. (b) FFT power spectra of data in (a). Signals are normalized to a same level. (c) Magnetic field dependence of the TRFR oscillatory frequency, with linear fit yielding . (d) Spin dephasing time as a function of transverse magnetic field. The solid line is a guide to the eye. The dashed line is a fit by 1/B dependence for .

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/content/aip/journal/apl/100/12/10.1063/1.3696069
2012-03-21
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Long-lived, room-temperature electron spin coherence in colloidal CdS quantum dots
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/12/10.1063/1.3696069
10.1063/1.3696069
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