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Quaternary Alloy Quantum Dots: Toward Low‐Threshold Stimulated Emission and All‐Solution‐Processed Lasers in the Green Region
Author(s) -
Wang Yue,
Yang Shancheng,
Yang Heesun,
Sun Handong
Publication year - 2015
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201400528
Subject(s) - materials science , quantum dot , laser , optoelectronics , coating , whispering gallery wave , alloy , nanotechnology , optics , metallurgy , physics , resonator
Ultra‐low threshold stimulated emission is demonstrated upon both one‐ and two‐photon pumping from quaternary alloyed Cd (1− x ) Zn x Se (1− y ) S y /ZnS quantum dots (QDs) in the green region for the first time. Moreover, an all‐solution‐processed whispering gallery mode laser is produced by coating Cd (1− x ) Zn x Se (1− y ) S y /ZnS QDs on a self‐assembled hemisphere. These results represent a significant progress in green lasers and hold great potential in addressing the “green gap” challenge.