Continuously tunable organic solid-state DFB laser utilizing molecular reorientation in molecular glasses.

Highlights: [•] Wavelength tuning of organic DFB lasers after fabrication by varying effective refractive index. [•] Vary refractive index by molecular reorientation of organic gain media at elevated temperatures. [•] Distributions of molecular orientations can be fine controlled by annealing temperatures and times. [•] Continuous tuning of the organic DFB lasing wavelengths after device fabrication is demonstrated. [ABSTRACT FROM AUTHOR]