Spectral narrowing in a perylene dye

Dharmadhikari, A.K.; Thakur, M.; Wang, L.; Cammarata, V.
August 2003
Applied Physics Letters;8/11/2003, Vol. 83 Issue 6, p1066
Academic Journal
Spectral narrowing has been observed in the solution of a recently synthesized perylene dye for pumping by the second harmonic of a picosecond Nd:yttrium–aluminum–garnet laser. The threshold energy for spectral narrowing at a concentration of 2×10[sup -3] M was observed to be 1.8 μJ for an excitation area of 5 mm[sup 2]. Spectrally narrowed emission with a linewidth of 5 nm centered at 600 nm was observed without incorporating any mirrors. The maximum photoluminescence quantum efficiency was 23% while the conversion efficiency in the laserlike emission was found to be 20%. A combination of stimulated and cooperative emission with a dominant contribution of the stimulated emission is attributed to the observed line narrowing and laserlike emission. © 2003 American Institute of Physics.


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