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나노 구조 물리 연구단
나노구조물리 연구단
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Optical logic operation via plasmon-exciton interconversion in 2D semiconductors

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Title
Optical logic operation via plasmon-exciton interconversion in 2D semiconductors
Author(s)
Jung Ho Kim; Jubok Lee; Hyun Kim; Seok Joon Yun; Jeongyong Kim; Hyun Seok Lee; Young Hee Lee
Publication Date
2019-06
Journal
SCIENTIFIC REPORTS, v.9, no., pp.9164 -
Publisher
NATURE PUBLISHING GROUP
Abstract
Nanophotonic devices manipulating light for high-speed computing are a counterpart of speed-limited electronic circuits. Although plasmonic circuits are a promising platform for subwavelength miniaturization, the logic-operation principle is still limited to mimicking those of photonic waveguides using phase shifts, polarization, interference, and resonance. Meanwhile, reconfigurable interconversion between exciton and plasmon engender emerging applications like exciton transistors and multiplexers, exciton amplifiers, chiral valleytronics, and nonlinear excitonics. Here, we propose optical logic principles realized by exciton-plasmon interconversion in Ag-nanowires (NW) overlapped on transition metal dichalcogenides (TMDs) monolayers. Excitons generated from TMDs couple to the Ag-NW plasmons, eventually collected as output signals at the Ag-NW end. Using two lasers, we demonstrate AND gate by modulating single excitons in Ag-NW on MoS2 and a half-adder by modulating dual excitons in lateral WSe2 and WS2. Moreover, a 4-to-2 binary encoder is realized in partially overlapped MoSe2 and MoS2 using four-terminal laser inputs. Our results represent great advances in communication processing for optical photonics integrable with subwavelength architectures. © The Author(s) 2019
URI
https://pr.ibs.re.kr/handle/8788114/6156
ISSN
2045-2322
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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