Congratulation Dr. Hyun Seok Lee for Nature Comm acceptance!
Title : Reconfigurable exciton-plasmon interconversion for nanophotonic circuits
Author : Hyun Seok Lee1,2*, Dinh Hoa Luong1,2, Min Su Kim1, Youngjo Jin1,2, Hyun Kim1,2, Seokjoon
4 Yun1,2, and Young Hee Lee1,2*
Abstract: The recent challenges of improving the operation speed of nanoelectronics has motivate
researches on manipulating light in on-chip integrated circuits. Hybrid plasmonic waveguides
with low-dimensional semiconductors, including quantum dots and quantum wells, are a
promising platform for realizing sub-diffraction limited optical components. Two17
dimensional transition metal dichalcogenides (TMDs) have been recently spotlighted owing
to tightly bound excitons at room temperature, strong light–matter and exciton–plasmon
interactions, available top-down wafer-scale integration, and band-gap tunability. Here, we
demonstrate principal functionalities for on-chip optical communications via reconfigurable
exciton-plasmon interconversion in ~200-nm-diameter Ag nanowires overlapping onto TMD
transistors. By varying device configurations for each operation purpose, three active
components for optoelectronic communications were realized; field-effect exciton transistors
with a channel length of ~32 μm, field-effect exciton multiplexers transmitting multiple
signals through a single NW, and electrical detectors of propagating plasmons with a high
On/Off ratio. Our results illustrate unique merits of two-dimensional semiconductors for
constructing reconfigurable device architectures in nanophotonic integrated circuits.