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Xue-Feng Jiang, Yun-Feng Xiao, Chang-Ling Zou, Lina He, Chun-Hua Dong, Bei-Bei Li, Yan Li, Fang-Wen Sun, Lan Yang and Qihuang Gong Highly Unidirectional Emission and Ultralow-Threshold Lasing from On-Chip Ultrahigh-Q Microcavities Advanced Materials 24

Version of Record online: 13 AUG 2012 | DOI: 10.1002/adma.201201229

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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.

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