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Optical Spectroscopy of Semiconductor Quantum Structures
Prof. Dr. Christian Schüller, Prof. Dr. Tobias Korn

In our research group we are exploring the charge-carrier and the spin dynamics as well as low-energy electronic excitations in semiconductor nanostructures. The systems of interest are either two-dimensional electron or hole systems in GaAs-AlGaAs quantum wells, or two-dimensional crystals (transition-metal dichalcogenides), like MoS2, MoSe2, WS2, and WSe2, and their van-der-Waals heterostructures. As experimental techniques we are employing time- and spatially resolved Kerr rotation, Raman spectroscopy, and time-resolved photoluminescence at low temperatures and in high magnetic fields.



News and Highlights:
December 2017 Our work on "Observation of macroscopic valley-polarized monolayer exciton-polaritons at room temperature" is published in Physical Review B.
November 2017 Our work on "Giant magnetic splitting inducing near-unity valley polarization in van der Waals heterostructures" is published in Nature Communications.
September 2017 Our work on "Highly Localized Strain in a MoS2/Au Heterostructure Revealed by Tip-Enhanced Raman Spectroscopy" is published in Nano Letters.
August 2017 Our work on "Long-lived spin polarization in n-doped MoSe2 monolayers " is published in Applied Physics Letters.
July 2017 Our work on "Direct Observation of the Band Gap Transition in Atomically Thin ReS2" is published in Nano Letters.
July 2017 Our work on "Polarized surface-enhanced Raman spectroscopy of suspended carbon nanotubes by Pt-Re nanoantennas" is published in Physical Review B.
June 2017 Our work on "Valley dynamics of excitons in monolayer dichalcogenides" is published in PSS Rapid Research Letters.
June 2017 Our work on "Neutral and charged inter-valley biexcitons in monolayer MoSe2 monolayer" is published in Nature Communications.
May 2017 Our work on "Valley polarized relaxation and upconversion luminescence from Tamm-plasmon trion-polaritons with a MoSe2 monolayer" is published in 2D materials.
May 2017 Our work on "Interlayer exciton dynamics in a dichalcogenide monolayer heterostructure" is published in 2D Materials.
May 2017 Our work on "Coulomb engineering of the bandgap and excitons in two-dimensional materials" is published in Nature Communications.
April 2017 Our work on "Spectral focusing of broadband silver electroluminescence in nanoscopic FRET-LEDs" is published in Nature Nanotechnology.
February 2017 Our work on "Valley-Polarized Exciton Dynamics in Exfoliated Monolayer WSe2" is published in Journal of Physical Chemistry C.
February 2017 Our work on "Direct Observation of Ultrafast Exciton Formation in a Monolayer of WSe2" is published in Nanoletters.
January 2017 Our work on "Optical investigation of electrical spin injection into an inverted two-dimensional electron gas structure" is published in Physical Review B.
November 2016 Our work on "Excitonic Valley Effects in Monolayer WS2 under High Magnetic Fields" is published in Nanoletters.
November 2016 Our work on "Excitonic linewidth and coherence lifetime in monolayer transition metal dichalcogenides" is published in Nature Communications.
October 2016 Our work on "Deterministic transfer of spin polarization in wire-like lateral structures via the persistent spin helix" is published in Applied Physics Letters.
September 2016 Our work on "Trion fine structure and coupled spin-valley dynamics in monolayer tungsten disulfide" is published in Nature Communications.
August 2016 Our work on "Magnetic-Field-Induced Rotation of Polarized Light Emission from Monolayer WS2" is published in Physical Review Letters.
August 2016 Our work on "Enhanced spin-orbit coupling in core/shell nanowires" is published in Nature Communications.
July 2016 Our work on "Coherent and Incoherent Coupling Dynamics between Neutral and Charged Excitons in Monolayer MoSe2" is published in Nanoletters.
May 2016 Our work on "Lightwave-driven quasiparticle collisions on a subcycle timescale" is published in Nature.
January 2016 Our work on "Ultrafast mid-infrared nanoscopy of strained vanadium dioxide nanobeams" is published in Nanoletters.
November 2015 Our work on "Coherent cyclotron motion beyond Kohn's theorem" is published in Nature Physics.
November 2015 Our work on "Observation of anisotropic interlayer Raman modes in few-layer ReS2" is published in PSS Rapid Research Letters.
September 2015 Our work on "Optical spectroscopy of interlayer coupling in artificially stacked MoS2 layers" is published in 2D Materials.
July 2015 Our work on "Identification of excitons, trions and biexcitons in single-layer WS2" is published in PSS Rapid Research letters.
July 2015 Our work on "Resonant internal quantum transitions and femtosecond radiative decay of excitons in monolayer WSe2"is published in Nature Materials.
June 2015 Our work on "Tailored nanoantennas for directional Raman studies of individual carbon nanotubes" is published in Physical Review B.
March 2015 Our work on "Control of biaxial strain in single-layer molybdenite using local thermal expansion of the substrate" is published in 2D Materials.
 
Last modified: 20th Dec, 2017 by Webmaster