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C. Rotschild, M. Tomes, H. Mendoza, T. L. Andrew, T. M. Swager, T. Carmon and M. A. Baldo Cascaded Energy Transfer for Efficient Broad-Band Pumping of High-Quality, Micro-Lasers Advanced Materials 23

Version of Record online: 24 MAY 2011 | DOI: 10.1002/adma.201100467

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Micro-ring lasers that exhibit a quality factor (Q) larger than 5.2 × 106 with a direct-illumination, non-resonant pump are demonstrated (a,b). The micro-rings are coated with three organic dyes forming a cascaded energy-transfer (c,d), which reduces material-losses by a factor larger than 104 (e), transforming incoherent light to coherent light with high quantum-efficiency. The operating principle is general and can enable fully integrated on-chip, high-Q micro-lasers.

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