Title

Enhanced Absorption In A Reverse Saturable Absorbing Dye Blended With Carbon Nanotubes

Keywords

Carbon nanotubes; HITCI; Nonlinear transmittance; Reverse saturable absorption

Abstract

Using nonlinear absorption at 532 nm in the nanosecond temporal regime, we have measured the low fluence nonlinear transmittance properties of the reverse saturable absorbing carbocyanine dye, 1,1′,3,3,3′,3′- hexamethylindotricarbocyanine iodide (HITCI), blended with well dispersed carbon nanotubes. The nonlinear optical properties of the blends are strongly dependent on the ratio of dye to nanotubes in solution. In the case where the nanotubes per dye molecule ratio is large, we see a distinctive enhancement in optical fluence limiting properties of the system, suggesting enhanced absorption of the excited states. However, when the nanotube to dye ratio decreases, the system's response is dominated by the behavior of the dye. We suggest that this can be understood as a two component system in which sensitized dye molecules associated with the nanotubes have an effectively different optical cross-section from the dye molecules far from the nanotubes. From classical antennae considerations, this is expected. Copyright © 2008 American Scientific Publishers All rights reserved.

Publication Date

1-1-2008

Publication Title

Journal of Nanoscience and Nanotechnology

Volume

8

Issue

12

Number of Pages

6470-6473

Document Type

Article

Personal Identifier

scopus

Socpus ID

58149306171 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/58149306171

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