2 papers
cond-mat.mes-hall2025
Brightening interlayer excitons by electric-field-driven hole transfer in bilayer WSe2
Tianyi Ouyang, Erfu Liu, Soonyoung Cha +8
We observe the interlayer A1s^I, A2s^I, and B1s^I excitons in bilayer WSe2 under applied electric fields using reflectance contrast spectroscopy. Remarkably, these interlayer excit…
cond-mat.mes-hall2024
Enhancing resonant second harmonic generation in bilayer WSe2 by layer-dependent exciton-polaron effect
Soonyoung Cha, Tianyi Ouyang, Takashi Taniguchi +3
Two-dimensional (2D) materials serve as exceptional platforms for controlled second harmonic generation (SHG), an important nonlinear optical phenomenon with diverse applications.…