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Microcavities: Highly Unidirectional Emission and Ultralow‐Threshold Lasing from On‐Chip Ultrahigh‐Q Microcavities (Adv. Mater. 35/2012)
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.201290211
Subject(s) - lasing threshold , materials science , whispering gallery wave , optoelectronics , photonics , optical microcavity , doping , chip , whispering gallery , resonator , laser , optics , physics , telecommunications , wavelength , computer science
Ultra‐high‐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 features both highly unidirectional emission and ultra‐high‐Q factors exceeding 100 million in near infrared. By doping erbium into the microcavity, lasing emission in 1550 nm band is observed under a convenient freespace optical pumping, with the threshold as low as 2 μW. More details can be found in the article by Q. Gong, Y.‐F. Xiao, and co‐workers on page OP260 .