title: Tunable random lasing behavior in plasmonic nanostructures.
abstract: Random lasing is desired in plasmonics nanostructures through surface plasmon amplification. In this study, tunable random lasing behavior was observed in dye molecules attached with Au nanorods (NRs), Au nanoparticles (NPs) and Au@Ag nanorods (NRs) respectively. Our experimental investigations showed that all nanostructures i.e., Au@AgNRs, AuNRs & AuNPs have intensive tunable spectral effects. The random lasing has been observed at excitation wavelength 532 nm and varying pump powers. The best random lasing properties were noticed in Au@AgNRs structure, which exhibits broad absorption spectrum, sufficiently overlapping with that of dye Rhodamine B (RhB). Au@AgNRs significantly enhance the tunable spectral behavior through localized electromagnetic field and scattering. The random lasing in Au@AgNRs provides an efficient coherent feedback for random lasers.
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.
authors.forename: Ashish
authors.initials: A
authors.lastname: Yadav
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.
authors.forename: Liubiao
authors.initials: L
authors.lastname: Zhong
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.
authors.forename: Jun
authors.initials: J
authors.lastname: Sun
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.
authors.forename: Lin
authors.initials: L
authors.lastname: Jiang
authors.affiliation: School of Industrial Engineering, Purdue University, 315 N. Grant St, West Lafayette, IN 47907 USA ; Birck Nanotechnology Center, Purdue University, 1205 W State St, West Lafayette, IN 47907 USA.
authors.forename: Gary J
authors.initials: GJ
authors.lastname: Cheng
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.
authors.forename: Lifeng
authors.initials: L
authors.lastname: Chi
keywords: Nanomaterials; Plasmonics; Scattering; Surface plasmons and random lasing