title: Hybrid Multilayered Plasmonic Nanostars for Coherent Random Lasing.
abstract: Here, we report that hybrid multilayered plasmonic nanostars can be universally used as feedback agents for coherent random lasing in polar or nonpolar solutions containing gain material. We show that silver-enhancement of gold nanostars reduces the pumping threshold for coherent random lasing substantially for both a typical dye (R6G) and a typical fluorescent polymer (MEH-PPV). Further, we reveal that the lasing intensity and pumping threshold of random lasers based on silver-enhanced gold nanostars are not influenced by the silica coating, in contrast to gold nanostar-based random lasers, where silica-coated gold nanostars support only amplified spontaneous emission but no coherent random lasing.
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Battulga
authors: B
authors: Munkhbat
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Johannes
authors: J
authors: Ziegler
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Hannes
authors: H
authors: Pöhl
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Christian
authors: C
authors: Wörister
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Dmitry
authors: D
authors: Sivun
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Markus C
authors: MC
authors: Scharber
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Thomas A
authors: TA
authors: Klar
authors: Institute of Applied Physics, and Linz Institute for Organic Solar Cells/Institute of Physical Chemistry, Johannes Kepler University Linz , 4040 Linz, Austria.
authors: Calin
authors: C
authors: Hrelescu