Second- and third- harmonic generation in single-walled carbon nanotubes at nanosecond time scale

De Dominicis, L.; Botti, S.; Asilyan, L. S.; Ciardi, R.; Fantoni, R.; Terranova, M. L.; Fiori, A.; Orlanducci, S.; Appolloni, R.
August 2004
Applied Physics Letters;8/23/2004, Vol. 85 Issue 8, p1418
Academic Journal
Second- and third-harmonic generation in single-walled carbon nanotube films is experimentally investigated with the fundamental 1064 nm radiation from a Q-switched Nd:YAG laser. Measurements were performed both on commercially available carbon nanotubes and on samples of carbon nanotubes grown with a catalyst-free method. Third-harmonic generation was observed in both samples while only the sample grown with a catalyst-free method generated a second-harmonic signal. The quantum yield of second- and third-harmonic signal was proven to scale, respectively, with the second and third power of the pump pulse energy up to intensities of 109 W/cm2.


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