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ACS Photonics. 2016 Jun 15;3(6):919-923. Epub 2016 May 20.

Plasmonic Nanostars as Efficient Broadband Scatterers for Random Lasing.

Author information

1
Institute of Applied Physics, Johannes Kepler University Linz , 4040 Linz, Austria.

Abstract

Huge spectral coverage of random lasing throughout the visible up to the infrared range is achieved with star-shaped gold nanoparticles ("nanostars"). As intrinsically broadband scattering centers, the nanostars are suspended in solutions of various laser dyes, forming randomly arranged resonators which support coherent laser modes. The narrow emission line widths of 0.13 nm or below suggest that gold nanostars provide an efficient coherent feedback for random lasers over an extensive range of wavelengths, all together spanning almost a full optical octave from yellow to infrared.

KEYWORDS:

gain; gold nanostars; multiple scattering; plasmon resonances; random lasing

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