Laser emission from electrospun polymer nanofibers

Fully organic nanofiber lasers, made by a polymer matrix doped with gain molecules, are demonstrated. The nanofiber lasers exhibit emission in the visible and near infrared range (see image), supporting efficient waveguiding of the self-emitted light. Individual fibers can operate as optical cavities, emitting single-mode laser light at visible wavelengths with a threshold of tens of µJ cm-2.