Spin coherence generation and detection in spherical nanocrystals

Smirnov, D. S.; Glazov, M. M.

doi:10.1088/0953-8984/24/34/345302

Cited by 5 publications

(4 citation statements)

References 39 publications

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“…x , S (0) y , and S (0) z . Indeed, similarly to the previously studied situation of the QD without the cavity [7,43,50,51] the circularly polarized pulse induces spin rotation in the (xy) plane. The spin rotation angle induced by the control pulse is defined from the phase of the spin beats in Eqs.…”

Section: Spin Coherence Controlsupporting

confidence: 54%

“…In the absence of the control pulse, this situation would simply correspond to the spin precession described by Eqs. (16) with initial conditions S Indeed, similarly to the previously studied situation of the QD without the cavity [7,43,50,51] the circularly polarized pulse induces spin rotation in the (xy) plane. The spin rotation angle induced by the control pulse is defined from the phase of the spin beats in Eqs.…”

Section: Spin Coherence Controlmentioning

confidence: 78%

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Theory of optical spin control in quantum dot microcavities

et al. 2015

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We present a microscopic theory of optical initialization, control and detection for a single electron spin in a quantum dot embedded into a zero-dimensional microcavity. The strong coupling regime of the trion and the cavity mode is addressed. We demonstrate that efficient spin orientation by a single circularly polarized pulse is possible in relatively weak transverse magnetic fields. The possibilities for spin control by additional circularly polarized pulse are analyzed. Under optimal conditions the Kerr and Faraday rotation angles induced by the spin polarized electron may reach tens of degrees.

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Section: Spin Coherence Controlsupporting

confidence: 54%

Section: Spin Coherence Controlmentioning

confidence: 78%

Theory of optical spin control in quantum dot microcavities

et al. 2015

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“…To that end we apply the quantum-mechanical model developed in Refs. [18,42]. It follows then that the spin components before, S − α (α = x, y, z), and immediately after, S + α , a single pump pulse accounting for the saturation effect are related as [6,18,42]…”

Section: Polarization Saturation Effectmentioning

confidence: 99%

Theory of spin inertia in singly charged quantum dots

et al. 2018

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The spin inertia measurement is a recently emerged tool to study slow spin dynamics, which is based on the excitation of the system by a train of circularly polarized pulses with alternating helicity. Motivated by the experimental results reported in E. A. Zhukov et al., arXiv:1806.11100 we develop the general theory of spin inertia of localized charge carriers. We demonstrate that the spin inertia measurement in longitudinal magnetic field allows one to determine the parameters of the spin dynamics of resident charge carriers and of photoexcited trions, such as the spin relaxation times, longitudinal g-factors, parameters of hyperfine interaction and nuclear spin correlation times. arXiv:1806.11098v2 [cond-mat.mes-hall]

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“…Refs. [16,21,34,35,44,45,50,53,55,[62][63][64][65][66][67][68] are cited in the supplementary materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Coherent Spin Dynamics of Electrons in CdSe Colloidal Nanoplatelets

Meliakov,

Belykh,

Kalitukha

et al. 2023

Nanomaterials

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Coherent spin dynamics of electrons in CdSe colloidal nanoplatelets are investigated by time-resolved pump–probe Faraday rotation at room and cryogenic temperatures. We measure electron spin precession in a magnetic field and determine g-factors of 1.83 and 1.72 at low temperatures for nanoplatelets with a thickness of 3 and 4 monolayers, respectively. The dephasing time of spin precession T2* amounts to a few nanoseconds and has a weak dependence on temperature, while the longitudinal spin relaxation time T1 exceeds 10 ns even at room temperature. Observations of single and double electron spin–flips confirm that the nanoplatelets are negatively charged. The spin–flip Raman scattering technique reveals g-factor anisotropy by up to 10% in nanoplatelets with thicknesses of 3, 4, and 5 monolayers. In the ensemble with a random orientation of nanoplatelets, our theoretical analysis shows that the measured Larmor precession frequency corresponds to the in-plane electron g-factor. We conclude that the experimentally observed electron spin dephasing and its acceleration in the magnetic field are not provided by the electron g-factor anisotropy and can be related to the localization of the resident electrons and fluctuations of the localization potential.

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Spin coherence generation and detection in spherical nanocrystals

Cited by 5 publications

References 39 publications

Theory of optical spin control in quantum dot microcavities

Theory of optical spin control in quantum dot microcavities

Theory of spin inertia in singly charged quantum dots

Coherent Spin Dynamics of Electrons in CdSe Colloidal Nanoplatelets

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