Two-color Kerr microscopy of two-dimensional materials with sub-picosecond time resolution

Abstract

We present a two-color Kerr microscopy system based on two electronically synchronized erbium-fiber laser oscillators with independently tunable emission energies spanning most of the visible spectrum. Combining a spatial resolution below 2 $\mu$m and sub-ps time resolution with high sensitivity and cryogenic sample temperatures, it is ideally suited for studying spin and valley dynamics in a wide range of two-dimensional materials. We illustrate its capabilities by studying a monolayer of the common semiconducting transition metal disulfide MoS${}_2$.

References in corpus (21)

• Coupled spin and valley physics in monolayers of MoS2 and other group-VI dichalcogenides
• Exciton Binding Energy and Nonhydrogenic Rydberg Series in Monolayer WS2
• Low-temperature photocarrier dynamics in monolayer MoS2
• Excitonic linewidth approaching the homogeneous limit in MoS2 based van der Waals heterostructures : accessing spin-valley dynamics
• Exciton Radiative Lifetime in Transition Metal Dichalcogenide Monolayers
• Carrier and polarization dynamics in monolayer MoS2
• Long-lived nanosecond spin relaxation and spin coherence of electrons in monolayer MoS_2 and WS_2
• Exciton fine structure and spin decoherence in monolayers of transition metal dichalcogenides
• Exciton Valley Dynamics probed by Kerr Rotation in WSe2 Monolayers
• Optical control of spin coherence in singly charged (In,Ga)As/GaAs quantum dots
• Coherent spin dynamics of electrons and holes in CsPbBr${}_3$ perovskite crystals
• High temperature gate control of quantum well spin memory
• Gate controlled spin-valley locking of resident carriers in WSe2 monolayers
• The ultrafast onset of exciton formation in 2D semiconductors
• Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
• Resonance profiles of valley polarization in single-layer MoS${}_2$ and MoSe${}_2$
• Micron-size two-dimensional methylammonium lead halide perovskites
• Valley Dynamics of Excitons in Monolayer Dichalcogenides
• Ultrafast supercontinuum fiber-laser based pump-probe scanning MOKE microscope for the investigation of electron spin dynamics in semiconductors at cryogenic temperatures with picosecond time and micrometer spatial resolution
• Long-lived spin polarization in n-doped MoSe${}_2$ monolayers
• Unambiguous determination of spin dephasing times in ZnO

Cited by in corpus (1)

• Twist angle dependent interlayer transfer of valley polarization from excitons to free charge carriers in WSe${}_2$/MoSe${}_2$ heterobilayers