Year: 2018
Type: article
Abstract: The authors show here that Kerr rotation is a sensitive probe of valley-dependent energy splitting induced by the optical Stark effect in two-dimensional semiconductors. Kerr rotation rejects the polarization-independent background and probes a complementary dielectric response from established absorption-based techniques, allowing detection of shifts as small as 4 \ensuremath{\mu}eV - the lowest reported value so far. The authors apply this improved valley Stark spectroscopy to a wider range of materials by observing Stark shifts of two energetically distinct exciton species in MoS${}_{2}$, representing the first valley- and energy-selective Stark effect in a single material.
Institution: Northwestern University
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2765917361