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Optical Materials: Size‐Dependent Nonlinear Optical Properties of Atomically Thin Transition Metal Dichalcogenide Nanosheets (Small 6/2015)
Author(s) -
Zhou KaiGe,
Zhao Min,
Chang MengJie,
Wang Qiang,
Wu XinZhi,
Song Yinglin,
Zhang HaoLi
Publication year - 2015
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201570034
Subject(s) - saturable absorption , materials science , nonlinear optical , transition metal , absorption (acoustics) , dispersion (optics) , thin film , nanotechnology , metal , optoelectronics , nonlinear system , optics , composite material , chemistry , wavelength , metallurgy , organic chemistry , fiber laser , physics , quantum mechanics , catalysis
A gradient centrifugation method developed by H.‐L. Zhang and co‐workers allows the preparation of atomically thin transition metal dichalcogenide (TMD) samples. Z‐scan measurements show on page 694 that a dispersion of 50–60 nm MoS 2 and WS 2 nanosheets exhibits reverse saturable absorption, in contrast to the saturable absorption of larger samples. Such a size‐dependent nonlinear optical property implies that the same TMD materials can be used in different applications simply by varying their sheet sizes.