Low threshold lasing from organic and polymeric microdisk printed by room temperature atmosphere ink-jet technique

Novel microdisk optical 3D structure fabrication was demonstrated in a room temperature and atmospheric condition with tens-seconds processing duration. This additive manufacturing scheme of polymeric microdisk was based on the ink-jet technique with hyperbranched polymer TZ-001. And whispering-gallery mode (WGM) lasing with a low threshold was confirmed by doping LDS798 or Rhodamine 590 dyes. The diameters both 75 mu m were archived. The WGM lasing at around 800 nm wavelength by the LDS798, and at around 600 nm by the Rhodamine 590. Low lasing threshold about 2 similar to 3 mu J/mm(2) were confirmed. And shift of peak wavelength was observed on the Rhodamine590: TZ-001 disk.