67 citations · 827 across the 58 of their papers we have counts for
30 papers · 1 filter
Spin-dependent exciton-exciton interactions in a mixed lead halide perovskite crystal
Stefan Grisard, Artur V. Trifonov, Thilo Hahn +6
We investigate the two-pulse photon echo response of excitons in the mixed lead halide perovskite crystal \sample in dependence on the excitation intensity and polarization of the…
Giant optical orientation of exciton spins in lead halide perovskite crystals
Natalia E. Kopteva, Dmitri R. Yakovlev, Eyüp Yalcin +11
Optical orientation of carrier spins by circularly polarized light is the basis of spin physics in semiconductors. Here, we demonstrate strong optical orientation of 85\%, approach…
Long-lived exciton coherence in mixed-halide perovskite crystals
Stefan Grisard, Artur V. Trifonov, Ivan A. Solovev +5
Compositional engineering of the optical properties of hybrid organic-inorganic lead halide perovskites is one of the cornerstones for the realization of efficient solar cells and…
Trion magnetic polarons in (Cd,Mn)Te/(Cd,Mn,Mg)Te quantum wells
F. Godejohann, R. R. Akhmadullin, K. V. Kavokin +7
A trion magnetic polaron formed by the exchange interaction of a positively charged exciton (trion) with localized spins of Mn ions is found experimentally in a 4\,nm wide C…
Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses
S. Grisard, H. Rose, A. V. Trifonov +9
We study Rabi rotations arising in intensity-dependent photon echoes from an ensemble of self-assembled InGaAs quantum dots. To achieve a uniform distribution of intensities within…
Giant effective Zeeman splitting in a monolayer semiconductor realized by spin-selective strong light-matter coupling
T. P. Lyons, D. J. Gillard, C. Leblanc +11
Strong coupling between light and the fundamental excitations of a two-dimensional electron gas (2DEG) are of foundational importance both to pure physics and to the understanding…
Accurate photon echo timing by optical freezing of exciton dephasing and rephasing in quantum dots
A. N. Kosarev, H. Rose, S. V. Poltavtsev +7
Semiconductor quantum dots are excellent candidates for ultrafast coherent manipulation of qubits by laser pulses on picosecond timescales or even faster. In inhomogeneous ensemble…
Effect of electric current on optical orientation of electrons in AlGaAs/GaAs heterostructure
O. S. Ken, E. A. Zhukov, I. A. Akimov +10
The effect of a lateral electric current on the photoluminescence H-band of an AlGaAs/GaAs heterostructure is investigated. The photoluminescence intensity and optical orientation…
The in-plane anisotropy of the hole factor in CdTe/(Cd,Mg)Te quantum wells studied by spin-dependent photon echoes
S. V. Poltavtsev, I. A. Yugova, A. N. Kosarev +6
We use the two-pulse spin-dependent photon echo technique to study the in-plane hole spin anisotropy in a 20~nm-thick CdTe/CdMgTe single quantum well by exciting…
Quantum beats in the polarization of the spin-dependent photon echo from donor-bound excitons in CdTe/(Cd,Mg)Te quantum wells
S. V. Poltavtsev, I. A. Yugova, Ya. A. Babenko +6
We study the quantum beats in the polarization of the photon echo from donor-bound exciton ensembles in semiconductor quantum wells. To induce these quantum beats, a sequence compo…
Step-like spectral distribution of photoelectrons at the percolation threshold in heavily -doped GaAs
S. V. Poltavtsev, R. I. Dzhioev, V. L. Korenev +3
We study the origin of the step-like shoulder on the high energy side of the low temperature photoluminescence spectrum of heavily -doped GaAs. We show experimentally that it is…
Spin beats in the photoluminescence polarization dynamics of charged excitons in InP/(In,Ga)P quantum dots in presence of nuclear quadrupole interaction
S. V. Nekrasov, I. A. Akimov, Yu. G. Kusrayev +2
The spin dynamics of positively (X) and negatively (X) charged excitons in InP/InGaP quantum dots subject to a magnetic field is studied. We find that…
Microscopic dynamics of electron hopping in a semiconductor quantum well probed by spin-dependent photon echoes
A. N. Kosarev, S. V. Poltavtsev, L. E. Golub +10
Spin-dependent photon echoes in combination with pump-probe Kerr rotation are used to study the microscopic electron spin transport in a CdTe/(Cd,Mg)Te quantum well in the hopping…
Voltage control of the long-range p-d exchange coupling in a ferromagnet-semiconductor quantum well hybrid structure
V. L. Korenev, I. V. Kalitukha, I. A. Akimov +14
Voltage control of ferromagnetism on the nanometer scale is highly appealing for the development of novel electronic devices. Here a key challenge is to implement and combine low p…
Polarimetry of photon echo on charged and neutral excitons in CdTe/(Cd,Mg)Te quantum wells
S. V. Poltavtsevy, Yu. V. Kapitonovy, I. A. Yugova +6
Coherent optical spectroscopy such as four-wave mixing and photon echo generation deliver detailed information on the energy levels involved in optical transitions through the anal…
Single-beam resonant spin amplification of electrons interacting with nuclei in a GaAs/(Al,Ga)As quantum well
M. Kotur, F. Saeed, R. W. Mocek +6
The dynamic polarization of nuclear spins interacting with resident electrons under resonant excitation of trions is studied in a nominally undoped GaAs/(Al,Ga)As quantum well. Unl…
Long coherent dynamics of localized excitons in (In,Ga)N/GaN quantum wells
S. V. Poltavtsev, I. A. Solovev, I. A. Akimov +6
We study the coherent dynamics of localized excitons in 100-periods of 2.5 nm thick (In,Ga)N/GaN quantum wells with 7.5% indium concentration, measured with spectroscopic resolutio…
Coherent dynamics of localized excitons and trions in ZnO/(Zn,Mg)O quantum wells studied by photon echoes
I. A. Solovev, S. V. Poltavtsev, Yu. V. Kapitonov +5
We study optically the coherent evolution of trions and excitons in a -doped 3.5 nm-thick ZnO/ZnMgO multiple quantum well by means of time-resolved four-wave m…
Photon echo from localized excitons in semiconductor nanostructures
S. V. Poltavtsev, I. A. Yugova, I. A. Akimov D. R. Yakovlev +1
An overview on photon echo spectroscopy under resonant excitation of the exciton complexes in semiconductor nanostructures is presented. The use of four-wave-mixing technique with…
Damping of Rabi oscillations in intensity-dependent photon echoes from exciton complexes in a CdTe/(Cd,Mg)Te single quantum well
S. V. Poltavtsev, M. Reichelt, I. A. Akimov +6
We study Rabi oscillations detected in the coherent optical response from various exciton complexes in a 20~nm-thick CdTe/(Cd,Mg)Te quantum well using time-resolved photon echoes.…
Excitation of magnon accumulation by laser clocking as a source of long-range spin waves in transparent magnetic films
M. Jäckl, V. I. Belotelov, I. A. Akimov +4
Optical tools are of great promise for generation of spin waves due to the possibility to manipulate on ultrashort time scales and to provide local excitation. However, a single la…
Photon echoes from (In,Ga)As quantum dots embedded in a Tamm-plasmon microcavity
M. Salewski, S. V. Poltavtsev, Yu. V. Kapitonov +9
We report on the coherent optical response from an ensemble of (In,Ga)As quantum dots (QDs) embedded in a planar Tamm-plasmon microcavity with a quality factor of approx. 100. Sign…
Photon echo transients from an inhomogeneous ensemble of semiconductor quantum dots
S. V. Poltavtsev, M. Salewski, Yu. V. Kapitonov +8
An ensemble of quantum dot excitons may be used for coherent information manipulation. Due to the ensemble inhomogeneity any optical information retrieval occurs in form of a photo…
Spin-dependent tunneling in semiconductor heterostructures with a magnetic layer
Igor Rozhansky, Konstantin Denisov, Nikita Averkiev +1
We present a theory that describes the appearance of circular polarization of the photoluminescence (PL) in ferromagnet-semiconductor hybrid heterostructures due to spin-dependent…