109 citations · 889 across the 59 of their papers we have counts for
32 papers · 1 filter
Resonant enhancement of Raman scattering in a MoS nanotube
D. R. Kazanov, A. V. Poshakinskiy
The whispering-gallery modes confined in the wall of a multiwall MoS nanotube resonantly enhance the spontaneous Raman scattering by its own optical phonons. The enhancement is…
Coherent transport in non-Abelian quantum graphs
A. V. Poshakinskiy, L. E. Golub
We study quantum charge transport in two-dimensional networks in the presence of a magnetic field and spin-orbit interaction. The interplay of the corresponding Abelian and non-Abe…
Trembling motion of electrons driven by Larmor spin precession
I. Stepanov, M. Ersfeld, A. V. Poshakinskiy +4
We show that the initialization of an ensemble of electrons in the same spin state in strained n-InGaAs subject to a perpendicular magnetic field triggers an AC electric current at…
Persistent spin grids with spin-orbit coupled 2D electron gas
A. V. Poshakinskiy
We consider the diffusive spin dynamics of a 2D electron gas with spin-orbit coupling confined within a grid of narrow channels. We show that the lifetime of certain spin distribut…
Enhancing Spin Diffusion in GaAs Quantum Wells: The Role of Electron Density and Channel Width
B. W. Grobecker, A. V. Poshakinskiy, S. Anghel +3
This study explores the relationship between spin diffusion, spin lifetime, electron density and lateral spatial confinement in two-dimensional electron gases hosted in GaAs quantu…
Direct observation of split-mode exciton-polaritons in a single MoS nanotube
A. I. Galimov, D. R. Kazanov, A. V. Poshakinskiy +5
A single nanotube synthesized from a transition metal dichalcogenide (TMDC) exhibits strong exciton resonances and, in addition, can support optical whispering gallery modes. This…
Spin helices in GaAs quantum wells: Interplay of electron density, spin diffusion, and spin lifetime
S. Anghel, A. V. Poshakinskiy, K. Schiller +4
To establish a correlation between the spin diffusion, the spin lifetime, and the electron density, we study, employing time-resolved magneto-optical Kerr effect microscopy, the sp…
Optomechanical lasing and domain walls driven by exciton-phonon interactions
Alexey V. Yulin, Alexander V. Poshakinskiy, Alexander N. Poddubny
We study theoretically interaction of optically-pumped excitons with acoustic waves in planar semiconductor nanostructures in the strongly nonlinear regime. We start with the multi…
Optomechanical circulator with a polaritonic microcavity
Alexander V. Poshakinskiy, Alexander N. Poddubny
We study theoretically optomechanical interactions in a semiconductor microcavity with embedded quantum well under the optical pumping by a Bessel beam, carrying a non-zero orbital…
MoS flake as a van der Waals homostructure: luminescence properties and optical anisotropy
Lyubov V. Kotova, Maxim V. Rakhlin, Aidar I. Galimov +6
We investigated multilayer plates made by exfoliation from a high-quality MoS crystal and reveal that they represent a new object - van der Waals homostructure consisting of a…
Waveguide quantum optomechanics: parity-time phase transitions in ultrastrong coupling regime
Ivan Iorsh, Alexander Poshakinskiy, Alexander Poddubny
We develop a rigorous theoretical framework for interaction-induced phenomena in the waveguide quantum electrodynamics (QED) driven by mechanical oscillations of the qubits. Specif…
Anisotropic Spin-Acoustic Resonance in Silicon Carbide at Room Temperature
A. Hernández-Mínguez, A. V. Poshakinskiy, M. Hollenbach +2
We report on acoustically driven spin resonances in atomic-scale centers in silicon carbide at room temperature. Specifically, we use a surface acoustic wave cavity to selectively…
Spin noise at electron paramagnetic resonance
A. V. Poshakinskiy, S. A. Tarasenko
We develop a microscopic theory of spin noise in solid-state systems at electron paramagnetic resonance, when the spin dynamics is driven by static and radio-frequency (RF) magneti…
Optomechanical tension and crumpling of resonant membranes
I. D. Avdeev, A. N. Poddubny, A. V. Poshakinskiy
We predict that illumination by a plane electromagnetic wave of optically resonant membranes, such as graphene or monolayers of transition metal dichalcogenides, directly affects t…
Towards exciton-polaritons in MoS nanotubes
D. R. Kazanov, M. V. Rakhlin, K. G. Belyaev +2
We measure low-temperature micro-photoluminescence spectra along a MoS nanotube, which exhibit the peaks of the optical whispering gallery modes below the exciton resonance. Th…
Optically detected spin-mechanical resonance in silicon carbide membranes
A. V. Poshakinskiy, G. V. Astakhov
Hybrid spin-mechanical systems are a promising platform for future quantum technologies. Usually they require application of additional microwave fields to project integer spin to…
Multiwall nanotubes of molybdenum disulfide as optical resonators
D. R. Kazanov, A. V. Poshakinskiy, V. Yu. Davydov +8
We study the optical properties of MoS nanotubes (NTs) with walls comprising dozens of monolayers. We reveal strong peaks in micro-photoluminescence (-PL) spectra when detec…
Persistent Spin Helix Manipulation by Optical Doping of a CdTe Quantum Well
F. Passmann, S. Anghel, T. Tischler +6
Time-resolved Kerr-rotation microscopy explores the influence of optical doping on the persistent spin helix in a [001]-grown CdTe quantum well at cryogenic temperatures. Electron…
Optical activity in chiral stacks of 2D semiconductors
Alexander V. Poshakinskiy, Dmitrii R. Kazanov, Tatiana V. Shubina +1
We show that the stacks of two-dimensional semiconductor crystals with the chiral packing exhibit optical activity and circular dichroism. We develop a microscopic theory of these…
Phonoritonic crystals with synthetic magnetic field for acoustic diode
A. V. Poshakinskiy, A. N. Poddubny
We develop a rigorous theoretical framework to describe light-sound interaction in the laser-pumped periodic multiple-quantum-well structure accounting for the hybrid phonon-polari…
Multiple quantum wells for PT-symmetric phononic crystals
A. V. Poshakinskiy, A. N. Poddubny, A. Fainstein
We demonstrate that the parity-time symmetry for sound is realized in the laser-pumped multiple-quantum-well structure. Breaking of the parity-time symmetry for the phonons with wa…
Biexciton-mediated superradiant photon blockade
Alexander V. Poshakinskiy, Alexander N. Poddubny
The photon blockade is a hallmark of quantum light transport through a single two-level system that can accomodate only one photon. Here, we theoretically show that two-photon tran…
Polariton resonances for ultra-strong coupling cavity optomechanics in GaAs/AlAs multiple quantum wells
B. Jusserand, A. Poddubny, A. Poshakinskiy +2
Polariton-mediated light-sound interaction is investigated through resonant Brillouin experiments in GaAs/AlAs multiple-quantum wells. Photoelastic coupling enhancement at exciton-…
Spatiotemporal spin fluctuations caused by spin-orbit-coupled Brownian motion
A. V. Poshakinskiy, S. A. Tarasenko
We develop a theory of thermal fluctuations of spin density emerging in a two-dimensional electron gas. The spin fluctuations probed at spatially separated spots of the sample are…