All-optical NMR in semiconductors provided by resonant cooling of nuclear spins interacting with electrons in the resonant spin amplification regime

Zhukov, E. A.; Greilich, A.; Yakovlev, D. R.; Kavokin, K. V.; Yugova, I. A.; Yugov, O. A.; Suter, Dieter; Karczewski, G.; Wójtowicz, T.; Kossut, J.; Петров, В. В.; Dolgikh, Yu. K.; Pawlis, A.; Bayer, М.

doi:10.1103/physrevb.90.085311

Cited by 29 publications

(28 citation statements)

References 39 publications

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“…2(c,d), we see that when the applied magnetic field is increasing in magnitude, the magnetic field experienced by the electrons is weaker than the one applied, causing each peak to shift to a stronger external fieldand vice versa. Prior work has not reported differences in RSA between increasing and decreasing applied magnetic field [9][10][11]16]. The equivalence of Fig.…”

Section: Resultsmentioning

confidence: 76%

Observation of magnetic field sweep direction dependent dynamic nuclear polarization under periodic optical electron spin pumping

et al. 2019

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Optical pump-probe techniques are used to generate and measure electron spin polarization in a gallium arsenide epilayer in which the electron spin coherence time exceeds the mode-locked laser repetition period. Resonant spin amplification occurs at magnetic fields at which the electron spin polarization excited by successive laser pulses add constructively. Measurements of Kerr rotation as a function of applied magnetic field reveal nuclear spin polarization that aligns either with or against the external magnetic field depending on whether the applied magnetic field is being decreased or increased. Furthermore, the nuclear spin polarization magnitude varies in proportion to the perpendicular net electron spin polarization as the latter changes due to resonant spin amplification and other causes. We also report an experimental technique that reveals a minutes-long memory of precise field history in the electron-nuclear spin system.

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Section: Resultsmentioning

confidence: 76%

Observation of magnetic field sweep direction dependent dynamic nuclear polarization under periodic optical electron spin pumping

et al. 2019

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“…Furthermore, we present an all-optical technique (see also Ref. [13]) employing TRKR in the resonant spin amplification (RSA) regime [14] to also measure the T 1 time. We use these two methods to perform a complete study of the dynamics of the 77 Se isotope, whose polarization was studied in Ref.…”

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confidence: 99%

Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe

et al. 2016

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We study the dynamics of optically-induced nuclear spin polarization in a fluorine-doped ZnSe epilayer via time-resolved Kerr rotation. The nuclear polarization in the vicinity of a fluorine donor is induced by interaction with coherently precessing electron spins in a magnetic field applied in the Voigt geometry. It is detected by nuclei-induced changes in the electron spin coherence signal. This all-optical technique allows us to measure the longitudinal spin relaxation time T1 of the 77 Se isotope in a magnetic field range from 10 to 130 mT under illumination. We combine the optical technique with radio frequency methods to address the coherent spin dynamics of the nuclei and measure Rabi oscillations, Ramsey fringes and the nuclear spin echo. The inhomogeneous spin dephasing time T * 2 and the spin coherence time T2 of the 77 Se isotope are measured. While the T1 time is on the order of several milliseconds, the T2 time is several hundred microseconds. The experimentally determined condition T1 ≫ T2 verifies the validity of the classical model of nuclear spin cooling for describing the optically-induced nuclear spin polarization.

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“…4 представлена кривая деполяризации, измеренная при частоте модуляции поляризации оптического возбуждения f mod = 50 кГц и мощности оптической накачки P = 15 мВт. В работе [8] авторы наблюдали аналогичные проявления в спектрах резонансного спинового усиления. Появление таких дополнительных максимумов на кривой деполяризации связаны с резонансным охлаждением ядерной спиновой системы за счет взаимодействия с оптически ориентированными электронными спинами [7].…”

Section: резонансное охлаждение ядерной спиновой системыunclassified

Релаксация электронного спина и резонансное охлаждение ядерных спинов в структурах GaAs : Mn

Евдокимов¹,

Кузнецова²,

Михайлов³

et al. 2021

Физика И Техника Полупроводников

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The behavior of the electron spin relaxation time in bulk GaAs layers doped with Mn was studied experimentally. We investigated the dependence of the degree of circular polarization of photoluminescence in transverse and longitudinal magnetic fields. An increase in the relaxation time of the electron spin is found from 25 ns at low pumping power to 400 ns at the threshold pumping power. The effect of resonant cooling of the nuclear spin system by optically oriented electron spins is demonstrated.

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All-optical NMR in semiconductors provided by resonant cooling of nuclear spins interacting with electrons in the resonant spin amplification regime

Cited by 29 publications

References 39 publications

Observation of magnetic field sweep direction dependent dynamic nuclear polarization under periodic optical electron spin pumping

Observation of magnetic field sweep direction dependent dynamic nuclear polarization under periodic optical electron spin pumping

Dynamics of nuclear spin polarization induced and detected by coherently precessing electron spins in fluorine-doped ZnSe

Релаксация электронного спина и резонансное охлаждение ядерных спинов в структурах GaAs : Mn

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