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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/193640
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- Lasing with well-defined cavity modes in dye-infiltrated silica inverse opals
- Nishijima, Yoshiaki; Ueno, Kosei; Juodkazis, Saulius; Mizeikis, Vygantas; Fujiwara, Hideki; Sasaki, Keiji; Misawa, Hiroaki
- Lasing in dye solution-embedded inverse silica opal structures was investigated. The opal films were prepared by sedimentation of polystyrene microspheres on a cover glass. The polystyrene structures were inverted using sol-gel infiltration of silica and subsequent removal of polystyrene. Photoluminescence of rhodamine (rhodamine B, 6G and sulfo-rhodamine 101) dye solutions embedded into the inverse silica opal structures exhibited clear signatures of the lasing via a distributed feedback (DFB) and gain modulation. The refractive index contrast between the dye and the inverse opal was small enough (∼ 0.03%) for the formation of refractive index coupling between the lasing modes. The lasing spectrum exhibited a highly regular periodic structure of modal peaks, rather than the chaotic superposition of peaks reported in previous studies. Lasing modes having a spectral width of about 0.25 nm and a free spectral range of about 0.75 nm appeared at the position of the maximum gain (the maximum fluorescence of the dye).
- Publication type
- Journal article
- Optics Express, Vol. 17, no. 4 (Feb 2009), pp. 2976-2978
- Publication year
- Optical Society of America
- Publisher URL
- Copyright © 2009 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://dx.doi.org/10.1364/oe.17.002976. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.