Narrowline blue laser emission has been reported from an electrically pumped film of the organic substance BSBCz coupled with a distributed-feedback grating. The long quest for an electrically pumped organic semiconductor diode may be over after a series of false alarms stretching back two decades. Now, a team led by Chihaya Adachi at Kyushu University (Fukuoka, Japan) reports narrowline blue laser emission very sensitive to properties of distributed-feedback structures from multiple devices at threshold-current densities near 1 kW per square centimeter—a big advance in a field that had been taking much smaller steps toward this goal.
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https://www.laserfocusworld.com/lasers-sources/article/14036783/electrically-pumped-organic-diode-laser-comes-to-fruition