Abstract
In this work, various pyrromethene dyes were doped into elastic films of polydimethylsiloxane (PDMS) as active layers of organic VCSELs and the laser properties of such PDMS-based VCSELs were systematically investigated. Mechanically tunable laser emission with high slope efficiencies, low threshold and wide tuning range were obtained. By uploading various stress or changing distributed-Bragg reflector (DBR) mirrors, single mode laser emission could be tuned from ∼590 to 690 nm, indicating their potential applications as cost-effective coherent sources on bio-chips. Under the pump energy 10 times higher than the threshold, the laser emission of organic VCSELs remained at its initial level after 1.2 × 105 pulses and a fast self-recovery process on the laser output energy with the elapse of aging time was observed. The differences between the self-recovery rates of various pyrromethene dyes were also discussed.
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