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Third-order nonlinear optical properties of colloidal gold nanorods
Autorzy
Rok wydania
2012
Czasopismo
Journal of Physical Chemistry C
Numer woluminu
116
Strony
13731-13737
DOI
10.1021/jp301821p
Kolekcja
Język
Angielski
Typ publikacji
Artykuł
We have evaluated the third-order nonlinear optical properties of gold nanorods in water solution in a broad range of wavelengths including both the longitudinal and transverse surface plasmon resonance (SPR) bands. On the basis of the analysis of Z-scan measurements performed with femtosecond laser pulses, we conclude that the optical nonlinearity in the longitudinal-SPR absorption range originates mainly from the saturation of the one-photon absorption, whereas a resonant two-photon absorption process is dominant in the transverse-SPR range of wavelengths. The discrepancies in the values of two-photon absorption coefficients reported by various researchers and the methods of reliable comparison of the results are discussed.
Słowa kluczowe
Saturation, Absorption, Nonlinear optics, Optical properties, Quantum mechanics
Adres publiczny
http://dx.doi.org/10.1021/jp301821p
Strona internetowa wydawcy
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