Due to the promising applications in full-color fat-panel displays and solid-state lighting sources,organic light-emitting devices(OLEDs)have attracted considerable interests since their discoveries.Light extraction in OLEDs has been an active area of research because of signifcant power loss arising from substrate modes from the total internal refection at the glass substrate/air interface,waveguide(WG)modes in organic/indium-tinoxide(ITO)anode layers,and surface plasmon–polariton(SPP)modes associated with the metallic electrode/organic interface.Microstructures with wavelength to subwavelength-scale periodicity have played important roles in optical and optoelectronic devices through manipulating the generation and propagation of photons in materials.We have investigated systematically the laser fabrication of microstructures in organic optoelectronic devices and their effects on improving the device performance.The WG and SPP modes that were generally lost in conventional bottom-emitting OLEDs have been successfully recovered by employing the microstructure,and a much enhanced light extraction has been observed.Dual-periodic corrugations which excite the SPPs resonance at two separate wavelengths have been introduced into the metallic electrodes of the white organic light-emitting devices(WOLEDs)to realize a broadband light extraction.