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Highly Unidirectional Emission and Ultralow‐Threshold Lasing from On‐Chip Ultrahigh‐Q Microcavities
Author(s) -
Jiang XueFeng,
Xiao YunFeng,
Zou ChangLing,
He Lina,
Dong ChunHua,
Li BeiBei,
Li Yan,
Sun FangWen,
Yang Lan,
Gong Qihuang
Publication year - 2012
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.201201229
Subject(s) - materials science , lasing threshold , optoelectronics , chip , nanotechnology , telecommunications , wavelength , computer science
Ultrahigh‐Q optical whispering gallery microcavities are promising platforms for fundamental studies and applied photonics. A new type of on‐chip microcavity is experimentally realized, which supports both highly unidirectional emission and ultra‐high‐Q factors exceeding 100 million in near infrared. By doping erbium, the unidirectional‐emission lasing is observed in 1550 nm band with the threshold as low as 2 μW.