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(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).
(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.
(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.
(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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