Distributed feedback lasing from dye-doped glass films using photopatterned gold nanoparticles.

Authors :: Fukushima, Masanori
Yanagi, Hisao
Hayashi, Shinji
Suganuma, Naotoshi
Taniguchi, Yoshio
Source :: Journal of Applied Physics; 5/15/2005, Vol. 97 Issue 10, p106104-1-106104-3, 3p, 1 Diagram, 1 Chart, 3 Graphs
Publication Year :: 2005
Abstract: We found a tunable lasing action of dye-doped glass films using a distributed feedback (DFB) resonator composed of gold (Au) nanoparticles. The Au-DFB resonators having various periodic spacings of 400-600 nm were fabricated by photoreduction of chloroauric ions doped in silica/ titania sSiO<subscript>2</subscript> /TiO<subscript>2</subscript>d sol-gel films using two-beam interference of a He-Cd laser. After lamination of a SiO<subscript>2</subscript> /TiO<subscript>2</subscript> film containing Rhodamine B sRBd, the device was pumped with a frequency-doubled yttrium aluminum garnet laser. As compared to the amplified spontaneous emission [full width at half maximum (FWHM) ~20 nm] from a RB-doped film without DFB, the laminated device indicated feedback-gained narrowing of the emission (FWHM~1 nm). Moreover, their peak wavelengths were shifted according to the tuned spacing of the Au-DFB resonator. [ABSTRACT FROM AUTHOR]

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