TY - JOUR
T1 - Electrical modulation of excitonic transition in monolayer tungsten disulfide on periodically poled ferroelectric substrates
AU - Seo, Changwon
AU - Kim, Jung Ho
AU - Lee, Jubok
AU - Yun, Seok Joon
AU - Kim, Teun Teun
AU - Kim, Jeongyong
N1 - Publisher Copyright:
© 2022 Korean Physical Society
PY - 2022/11
Y1 - 2022/11
N2 - Although the spectral investigation of monolayer two-dimensional transition metal dichalcogenide (1L-TMD) has been extensively performed for identifying modulation of excitonic transition, study of excitonic transition in ferroelectric/TMD hybrid structure is essential to understand and design high speed and low loss devices based on in-plane junctions. Here, we demonstrate electrical modulation of excitonic transition by transferring 1L-tungsten disulfide (WS2) onto a ferroelectric domain surface, a periodically poled lithium niobate (PPLN). We observe that exciton (A0) and trion (A−) emissions of 1L-WS2 are spatially modulated depending on the sign of the phase domain, such that A0 and A− emission is stronger at the positive (D+) and negative (D−) domain, respectively. In addition, different trends of excitonic transition of 1L-WS2 between D+ and D− domain are demonstrated by applying a back-gate bias voltage. The spatial modulation of electrical and optical characteristics of 1L-TMDs will help to design the homo- or hetero p-n junctions based on TMDs.
AB - Although the spectral investigation of monolayer two-dimensional transition metal dichalcogenide (1L-TMD) has been extensively performed for identifying modulation of excitonic transition, study of excitonic transition in ferroelectric/TMD hybrid structure is essential to understand and design high speed and low loss devices based on in-plane junctions. Here, we demonstrate electrical modulation of excitonic transition by transferring 1L-tungsten disulfide (WS2) onto a ferroelectric domain surface, a periodically poled lithium niobate (PPLN). We observe that exciton (A0) and trion (A−) emissions of 1L-WS2 are spatially modulated depending on the sign of the phase domain, such that A0 and A− emission is stronger at the positive (D+) and negative (D−) domain, respectively. In addition, different trends of excitonic transition of 1L-WS2 between D+ and D− domain are demonstrated by applying a back-gate bias voltage. The spatial modulation of electrical and optical characteristics of 1L-TMDs will help to design the homo- or hetero p-n junctions based on TMDs.
KW - Electrostatic force microscopy (EFM)
KW - Periodically poled lithium niobate (PPLN)
KW - Photoluminescence (PL)
KW - Tungsten disulfide (WS)
UR - https://www.scopus.com/pages/publications/85137725474
U2 - 10.1016/j.cap.2022.08.009
DO - 10.1016/j.cap.2022.08.009
M3 - Article
AN - SCOPUS:85137725474
SN - 1567-1739
VL - 43
SP - 90
EP - 96
JO - Current Applied Physics
JF - Current Applied Physics
ER -