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Broadband Optical Non‐linearity Induced by Charge‐Transfer Excitons in Type‐II CdSe/ZnTe Nanocrystals
Author(s) -
Liu Yunlong,
Zhang Chunfeng,
Zhang Huichao,
Wang Rui,
Hua Zheng,
Wang Xiaoyong,
Zhang Jiayu,
Xiao Min
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201301559
Subject(s) - materials science , exciton , nanocrystal , semiconductor , optoelectronics , broadband , charge (physics) , band gap , nanotechnology , optics , condensed matter physics , physics , quantum mechanics
Benefiting from excitonic charge‐transfer states, an efficient non‐linear optical response is observed in type‐II nanocrystals by four‐wave mixing when the incident photon energy lies below the bandgaps of constituent semiconductors. The non‐linear optical properties in nanocrystals can be manipulated by the band alignment of the core–shell components, which serves as a promising platform to design broadband non‐linear optical devices.