Polymer Lasing in a Periodic-Random Compound Cavity

Abstract

Simultaneous distributed feedback (DFB) lasing and linear polarized random lasing are observed in a compound cavity, which consists of a grating cavity and a random cavity. The grating cavity is fabricated by interference lithography. A light-emitting polymer doped with silver nanoparticles is spin-coated on the grating, forming a random cavity. DFB lasing and random lasing occur when the periodic-random compound cavity is optically pumped. The directionality and polarization of the random laser are modified by the grating structure. These results can potentially be used to design integrated laser sources.

Aluminosilicate‐epoxy resin composite as novel material for electrical insulation with enhanced mechanical properties and improved thermal conductivity

“…The highest thermal conductivity was obtained for the 007sst45 sample with 63% relative increase in relation to the reference sample filled with silica. The received thermal conductivity for composites with fillers 007sst45 and 010est45 are improved in relation to similar samples presented in the literature [36], what may indicate that processing method selected herein was more effective for heat paths formation.…”

“…Moreover, filler surface treatment was emphasized as an essential step for the appropriate distribution of a filler in the polymer matrix [34] and enhanced bonding between components [35]. It is also worth to notice paper presented by Zhao et al [36] where thermal conductivity of the Silatherm-epoxy resin injection molded composites were examined, and it was found that thermal conduction can be successfully improved by Silatherm incorporation. However, in order to assess if the material is suitable as an electrical insulation, it is necessary to investigate also dielectric and mechanical properties.…”

Flexible Random Laser Using Silver Nanoflowers

“…Figure 4b shows the emission intensity and the FWHM of the random laser as a function of the pump energy densities, showing the threshold as low as 6.1 μJ/cm 2 . In comparison with our previous results [29,30], the low-threshold random lasing action is attributed to the strong plasmonic enhancement and high-quality waveguide confinement provided by the Ag NFs and the polymer membrane, respectively.…”

Tailoring Whispering Gallery Lasing and Random Lasing in A Compound Cavity

“…Different kinds of laser were expected to be integrated in a compound cavity to explore the miniaturization and interactions of microcavity lasers. Recently, the integration of Fabry-Perot-WGM, Fabry-Perot-random, DFB-random, and WGM-random were reported, respectively [16][17][18][19]. Liu et al reported a stable hybrid WGM/random lasing, which was achieved from a single microsized SiO 2 sphere with all-inorganic perovskite CsPbBr 3 -SiO 2 quantum dots (QDs) embedded [19].…”