Optically pumped distributed feedback dye lasing with slide-coated TiO2 inverse-opal slab as Bragg reflector
SCIE
SCOPUS
- Title
- Optically pumped distributed feedback dye lasing with slide-coated TiO2 inverse-opal slab as Bragg reflector
- Authors
- Sung Gu Han; Jongchul Lim; Jinsub Shin; Sung-Min Lee; Park, T; Jongseung Yoon; Kyoungja Woo; Hyunjung Lee; Wonmok Lee
- Date Issued
- 2014-08-15
- Publisher
- Optical Society of America
- Abstract
- 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
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/14267
- DOI
- 10.1364/OL.39.004743
- ISSN
- 0146-9592
- Article Type
- Article
- Citation
- OPTICS LETTERS, vol. 39, no. 16, page. 4743 - 4746, 2014-08-15
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