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Microresonators and lasers on the micro- and nanoscale are potential candidates for spectroscopic applications and sensing elements. The optical properties of these devices enable highly sensitive elements in biophotonics. They can be integrated in lab-on-chip platforms and act as biosensors for label-free detection of molecules in point-of-care diagnosis. One of the most promising resonators type...
We report on the fabrication and optical characterization of whispering-gallery microcavity lasers with an organic semiconductor gain layer and laser thresholds as low as 1 nJ per pulse, operating at visible wavelengths.
We report laser action from conical polymeric microcavities. A thin film of the organic semiconductor tris(8-hydroxyquinoline) aluminum (Alq3) doped with the laser dye 4-dicyanmethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM) on top of the microcones enables low-threshold lasing when pumped with a conventional blu-ray laser diode. This combination might pave the way towards compact, low-cost...
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