Tuning Multi-wavelength Lasing in Rhodamine 640/Methylene Blue/Ag NW Random Lasers

In order to comprehend how fluorescence resonance energy transfer affects the emission spectra and threshold of Rhodamine 640/methylene blue/Ag NW lasers, this article examines a particular type of random laser with coherent features. It is shown that methylene blue laser output is enhanced by rhodamine 640 beyond 700 nm. Furthermore, it has produced multi-wavelength lasing with linewidths as small as 1 nm by adjusting the mixing ratio of the two dyes. In this system, silver nanowires operate as scatters, decreasing the operating threshold for multi-wavelength lasing and improving light extraction efficiency in the visible region.