Open AccessEffect of the concentration of organic dyes on their surface plasmon enhanced two-photon absorption cross section using activated Au nanoparticles
Author(s) -
Ion Cohanoschi,
Sheng Yao,
Kevin D. Belfield,
Florencio E. Hernández
Publication year - 2007
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.2718897
Subject(s) - surface plasmon resonance , absorption (acoustics) , nanoparticle , absorption cross section , surface plasmon , aqueous solution , plasmon , two photon absorption , materials science , resonance (particle physics) , photochemistry , 3d optical data storage , electric field , photon , chemistry , optoelectronics , analytical chemistry (journal) , cross section (physics) , nanotechnology , optics , atomic physics , laser , organic chemistry , physics , quantum mechanics , composite material
In this article we present the study of the surface plasmon enhanced two-photon absorption of a hydrophilic stilbene derivative (trans-4,4’-diaminostilbene) in aqueous solution at different concentrations. The observed exponential growth of the effective two-photon absorption cross section [σ2′(Au)] is attributed to the electric-field augmentation via surface plasmon resonance between nanoparticles, i.e., hot spots, and the molecular density on Au nanospheres. An unprecedented σ2′(Au)=550 000 GM has been measured. This result opens a new universe of applications in multiphoton imaging, photodynamic therapy, telecommunications, optical limiting, and multidimensional data storage using hybrid systems.
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