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Tunable random lasing behavior in plasmonic nanostructures.

Ashish Yadav¹, Liubiao Zhong¹, Jun Sun¹

¹Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, 215123 Jiangsu People's Republic of China.

Nano Convergence

|February 14, 2017

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This study demonstrates tunable random lasing in plasmonic nanostructures. Gold-silver core-shell nanorods (Au@AgNRs) showed superior random lasing properties due to enhanced spectral overlap and localized electromagnetic fields.

Area of Science:

Plasmonics
Nanophotonics
Quantum Optics

Background:

Random lasing utilizes surface plasmon amplification in plasmonic nanostructures.
Achieving tunable random lasing is crucial for advanced optical applications.

Purpose of the Study:

To investigate tunable random lasing behavior in dye molecules coupled with various gold-based nanostructures.
To identify nanostructure designs that optimize random lasing properties.

Main Methods:

Synthesized and characterized gold nanorods (AuNRs), gold nanoparticles (AuNPs), and gold-silver core-shell nanorods (Au@AgNRs).
Investigated random lasing phenomena using dye molecules (Rhodamine B) at a 532 nm excitation wavelength and varying pump powers.
Analyzed spectral effects and lasing properties of different nanostructures.

Keywords:

Nanomaterials Plasmonics Scattering Surface plasmons and random lasing

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Last Updated: Mar 7, 2026

Trapping of Micro Particles in Nanoplasmonic Optical Lattice

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Main Results:

All tested nanostructures (Au@AgNRs, AuNRs, AuNPs) exhibited tunable spectral effects.
Au@AgNRs demonstrated the best random lasing properties, characterized by broad absorption overlapping with Rhodamine B.
Enhanced tunable spectral behavior in Au@AgNRs was attributed to localized electromagnetic fields and scattering.

Conclusions:

Au@AgNRs provide efficient coherent feedback, enabling superior random lasing.
The study highlights the potential of Au@AgNRs for developing advanced tunable random lasers.