Tatsuo Nakagawa

Intertwined bulk photocarrier and interfacial barrier dynamics in van der Waals point-contact Schottky junctions

Abstract Schottky junctions based on transition-metal dichalcogenides underpin next-generation optoelectronic devices, yet the nanoscale carrier dynamics that ultimately govern their performance remain largely inaccessible. Here, we employ optical pump–probe time-resolved atomic...

Helical Nanocavity-Driven Upconversion Circularly Polarized Luminescence with Efficient Triplet Dynamics in Poly(methyl methacrylate) Stereocomplexes

Abstract Triplet–triplet annihilation photon upconversion circularly polarized luminescence (TTA-UC-CPL) in solid-state materials remains challenging because the molecular ordering required for chirality often compromises triplet energy transfer and oxygen tolerance. Herein, we r...