Han, Sung Gu Lim, Jongchul Shin, Jinsub Lee, Sung-Min Park, Taiho Yoon, Jongseung Woo, Kyoungja Lee, Hyunjung Lee, Wonmok 2024-01-20T09:03:27Z 2024-01-20T09:03:27Z 2021-09-02 2014-08-15 0146-9592 https://pubs.kist.re.kr/handle/201004/126463 We demonstrate an optical amplification of organic dye within a TiO2 inverse-opal (IO) distributed feedback (DFB) reflector prepared by a slide-coating method. Highly reflective TiO2 IO film was fabricated by slide coating the binary aqueous dispersions of polystyrene microspheres and charge-stabilized TiO2 nanoparticles on a glass slide and subsequently removing the polymer-opal template. TiO2 IO film was infiltrated, in turn, with the solutions of DCM, a fluorescent dye in various solvents with different indices of refraction. Optical pumping by frequency-doubled Nd: YAG laser resulted in amplified spontaneous emission in each dye solution. In accordance with the semi-empirical simulation by the FDTD method, DCM in ethanol showed the best emission/stopband matching for the TiO2 IO film used in this study. Therefore, photo excitation of a DCM/ethanol cavity showed a single-mode DFB lasing at 640 nm wavelength at moderate pump energy. (C) 2014 Optical Society of America English OPTICAL SOC AMER PHOTONIC CRYSTAL POLYMER MICROSPHERES NANOPARTICLES FABRICATION FILMS LASER BAND Optically pumped distributed feedback dye lasing with slide-coated TiO2 inverse-opal slab as Bragg reflector Article 10.1364/OL.39.004743 1 OPTICS LETTERS, v.39, no.16, pp.4743 - 4746 OPTICS LETTERS 39 16 4743 4746 scie scopus 000341099400028 2-s2.0-84906089026 Optics Optics Article PHOTONIC CRYSTAL POLYMER MICROSPHERES NANOPARTICLES FABRICATION FILMS LASER BAND dye lasing TiO2 inverse-opal Bragg reflector photonic crystal