24 citations · 24 across the 7 of their papers we have counts for
7 papers
Floquet spintronics: tuning the current-induced spin polarization of topological surface states with light
Youngjae Kim, Aayushi Agrawal, Kwon Park
Topological surface states are a promising platform for spintronics due to spin-momentum locking. Spin-momentum locking can induce a net spin polarization in topological surface st…
High Photovoltaic Efficiency in Bulk-Stacked One-Dimensional GeSe van der Waals Crystal
Seoung-Hun Kang, Youngjae Kim, Bo Gyu Jang +1
Germanium diselenide (GeSe) has recently attracted substantial interest as a rare example of one-dimensional (1D) van der Waals material. Here, we investigate the photovoltai…
Floquet Chern Insulators and Radiation-Induced Zero Resistance in Irradiated Graphene
Youngjae Kim, Kwon Park
Recent advances in optics and time-resolved techniques have facilitated the exploration of new states of matter under nonequilibrium conditions. Here, we predict that irradiated gr…
Light-Wave Engineering for Selective Polarization of a Single Valley in Transition Metal Dichalcogenides
Youngjae Kim
The selective control of specific momentum valleys lies at the core of valleytronics, a field that has thus far focused primarily on the and valleys in t…
Topological beaming of light: Proof-of-concept experiment
Yu Sung Choi, Ki Young Lee, Soo-Chan An +4
Beam shaping in nanophotonic systems remains a challenge due to the reliance on complex heuristic optimization procedures. In this work, we experimentally demonstrate a novel appro…
Pseudospins revealed through the giant dynamical Franz-Keldysh effect in massless Dirac materials
Youngjae Kim
The dynamical Franz-Keldysh effect, indicative of the transient light-matter interaction regime between quantum and classical realms, is widely recognized as an essential signature…
Defect Passivation of 2D Semiconductors by Fixating Chemisorbed Oxygen Molecules via h-BN Encapsulations
Jin-Woo Jung, Hyeon-Seo Choi, Young-Jun Lee +9
Hexagonal boron nitride (h-BN) is a key ingredient for various two-dimensional (2D) van der Waals heterostructure devices, but the exact role of h-BN encapsulation in relation to t…