Open AccessSTUDYING ON NONLINEAR OPTICAL PROPERTIES OF Fe2O3 NANOPARTICLES IN COLLOIDAL SOLUTION
Author(s) -
Biao Yu,
Guilan Zhang,
Guiqian Tang,
Xiaochun Wu,
Wenju Chen,
Bojun Yang
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.579
Subject(s) - materials science , refractive index , nanoparticle , absorption (acoustics) , hydrosol , toluene , attenuation coefficient , two photon absorption , nonlinear optics , molecule , z scan technique , nonlinear system , molecular physics , absorption cross section , chemical physics , optics , optoelectronics , cross section (physics) , nanotechnology , chemistry , laser , composite material , physics , organic chemistry , quantum mechanics
The nonlinear optical properties of Fe2O3 nanoparticles coated with a layer of organic molecules(DBS) in toluene and bare nanoparticles in hydrosol have been studied in the transparency region by Z scan technique.The key parameters such as nonlinear refractive index γ,two-photon absorption coefficient β and the variation of refractive index per unit photoexcited carrier density σr as well as free-carrier absorption cross section σab were determined.The influences of free-carrier effects on optical nonlinearities of Fe2O3 nanoparticles were discussed.