77 citations · 186 across the 6 of their papers we have counts for
6 papers
Dual-Polarization SHG Interferometry for Imaging Antiparallel Domains and Stacking Angles of 2D Heterocrystals
Juseung Oh, Wontaek Kim, Gyouil Jeong +5
Optical second-harmonic generation (SHG) enables orientational polarimetry for crystallographic analysis and domain imaging of various materials. However, conventional intensity po…
Exciton-Sensitized Second-Harmonic Generation in 2D Heterostructures
Wontaek Kim, Gyouil Jeong, Juseung Oh +4
The efficient optical second-harmonic generation (SHG) of two-dimensional (2D) crystals, coupled with their atomic thickness that circumvents the phase-match problem, has garnered…
Interface-Confined Doubly Anisotropic Oxidation of Two-Dimensional MoS2
Yejin Ryu, Wontaek Kim, Seonghyun Koo +4
Despite their importance, chemical reactions confined in a low dimensional space are elusive and experimentally intractable. In this work, we report doubly anisotropic, in-plane an…
On-Stack Two-Dimensional Conversion of MoS2 into MoO3
Taeg Yeoung Ko, Areum Jeong, Wontaek Kim +10
Chemical transformation of existing two-dimensional (2D) materials can be crucial in further expanding the 2D crystal palette required to realize various functional heterostructure…
Second-Harmonic Young Interference in Atom-Thin Heterocrystals
Wontaek Kim, Je Yhoung Ahn, Juseung Oh +2
Optical second-harmonic generation (SHG) is a nonlinear parametric process that doubles the frequency of incoming light. Only allowed in non-centrosymmetric materials, it has been…
Variation of photoluminescence spectral line shape of monolayer WS2
Yongjae Kwon, Kangwon Kim, Wontaek Kim +2
The origin of the variation of photoluminescence (PL) spectra of monolayer tungsten disulfide (WS2) is investigated systematically. Dependence of the PL spectrum on the excitation…