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 (7)

• Exciton Valley Dynamics probed by Kerr Rotation in WSe2 Monolayers
• Optical control of spin coherence in singly charged (In,Ga)As/GaAs quantum dots
• The ultrafast onset of exciton formation in 2D semiconductors
• Pump-Probe Faraday Rotation and Ellipticity in an Ensemble of Singly Charged Quantum Dots
• Micron-size two-dimensional methylammonium lead halide perovskites
• Valley Dynamics of Excitons in Monolayer Dichalcogenides
• Long-lived spin polarization in n-doped MoSe${}_2$ monolayers

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