171 citations · 998 across the 28 of their papers we have counts for
19 papers · 1 filter
Interaction between Rydberg Excitons in Cuprous Oxide Revealed through Resonant Second Harmonic Generation
Andreas Farenbruch, Henje Stolz, Peter Grünwald +5
We report experimental and theoretical investigations of interacting excitons of the yellow series in cuprous oxide (CuO) with principal quantum numbers up to by means of secon…
Rydberg excitons in CuO at millikelvin temperatures
Julian Heckötter, David Janas, Marc Aßmann +1
Rydberg excitons in the semiconductor CuO have been observed in absorption experiments up to a principal quantum number of n = 28 at millikelvin temperatures [1]. Here, we exte…
Nonlinear Rydberg exciton-polaritons in CuO microcavities
Maxim Makhonin, Anthonin Delphan, Kok Wee Song +13
Rydberg excitons (analogues of Rydberg atoms in condensed matter systems) are highly excited bound electron-hole states with large Bohr radii. The interaction between them as well…
Magneto-Stark and Zeeman effect as origin of second harmonic generation of excitons in CuO
A. Farenbruch, J. Mund, D. Fröhlich +4
We report on the experimental and theoretical investigation of magnetic-field-induced second harmonic generation (SHG) and two-photon absorption (TPA) of excited exciton states ($n…
Stimulated spin noise in an activated crystal
M. M. Sharipova, A. N. Kamenskii, I. I. Ryzhov +5
In the spin noise spectroscopy, the magnetic susceptibility spectrum is known to be provided by the spin-system untouched by any external perturbation, or, better to say, disturbed…
Tracking Dark Excitons with Exciton Polaritons in Semiconductor Microcavities
Daniel Schmidt, Bernd Berger, Marius Kahlert +6
Dark excitons are of fundamental importance for a wide variety of processes in semiconductors, but are difficult to investigate using optical techniques due to their weak interacti…
Anisotropies in the linear polarization of vacancy photoluminescence in diamond induced by crystal rotations and strong magnetic fields
D. Braukmann, V. P. Popov, E. R. Glaser +3
We study the linear polarization properties of the photoluminescence of the neutral and negatively charged nitrogen vacancies and neutral vacancies in diamond crystals as function…
Exciton and trion dynamics in atomically thin MoSe2 and WSe2: effect of localization
D. Schmidt, T. Godde, J. Schmutzler +9
We present a detailed investigation of the exciton and trion dynamics in naturally doped MoSe2 and WSe2 single atomic layers as a function of temperature in the range 10-300K under…
Signatures of Quantum Coherence in Rydberg Excitons
P. Grünwald, M. Aßmann, J. Heckötter +4
Coherent optical control of individual particles has been demonstrated both for atoms and semiconductor quantum dots. Here we demonstrate the emergence of quantum coherent effects…
Influcence of the nuclear electric quadrupolar interaction on the coherence time of hole- and electron-spins confined in semiconductor quantum dots
Johannes Hackmann, Frithjof B. Anders, Philipp Glasenapp +2
The real-time spin dynamics and the spin noise spectra are calculated for p and n-charged quantum dots within an anisotropic central spin model extended by additional nuclear elect…
Exciton spin dynamics and photoluminescence polarization of CdSe/CdS dot-in-rod nanocrystals in high magnetic fields
B. Siebers, L. Biadala, D. R. Yakovlev +4
The exciton spin dynamics and polarization properties of the related emission are investigated in colloidal CdSe/CdS dot-in-rod (DiR) and spherical core/shell nanocrystal (NC) ense…
Optical properties of two-dimensional gallium chalcogenide films
O. Del Pozo-Zamudio, S. Schwarz, M. Sich +12
Gallium chalcogenides are promising building blocks for novel van der Waals heterostructures. We report low-temperature micro-photoluminescence (PL) of GaTe and GaSe films with thi…
All-optical flow control of a polariton condensate using non-resonant excitation
Johannes Schmutzler, Przemyslaw Lewandowski, Marc Aßmann +6
The precise adjustment of the polariton condensate flow under incoherent excitation conditions is an indispensable prerequisite for polariton-based logic gate operations. In this r…
Nonlinear spectroscopy of exciton-polaritons in a GaAs-based microcavity
Johannes Schmutzler, Marc Aßmann, Thomas Czerniuk +4
We present a systematic investigation of two-photon excitation processes in a GaAs-based microcavity in the strong-coupling regime. We observe second harmonic generation resonant t…
Second harmonic generation spectroscopy of excitons in ZnO
M. Lafrentz, D. Brunne, A. V. Rodina +5
Nonlinear optics of semiconductors is an important field of fundamental and applied research, but surprisingly the role of excitons in the coherent processes leading to harmonics g…
Resources of polarimetric sensitivity in spin noise spectroscopy
P. Glasenapp, A. Greilich, I. I. Ryzhov +4
We attract attention to the fact that the ultimate (shot-noise-limited) polarimetric sensitivity can be enhanced by orders of magnitude leaving the photon flux incident onto the ph…
Optical control of coherent interactions between quantum dot electron spins
S. Spatzek, A. Greilich, Sophia E. Economou +7
Coherent interactions between spins in quantum dots are a key requirement for quantum gates. We have performed pump-probe experiments in which pulsed lasers emitting at different p…
Spin dynamics of electrons and holes in InGaAs/GaAs quantum wells at milliKelvin temperatures
L. V. Fokina, I. A. Yugova, D. R. Yakovlev +6
The carrier spin dynamics in a n-doped (In,Ga)As/GaAs quantum well has been studied by time-resolved Faraday rotation and ellipticity techniques in the temperature range down to 43…
Collective single mode precession of electron spins in a quantum dot ensemble
A. Greilich, S. Spatzek, I. A. Yugova +6
We show that the spins of all electrons, each confined in a quantum dot of an (In,Ga)As/GaAs dot ensemble, can be driven into a single mode of precession about a magnetic field. Th…