Ambrosio, Antonio and Maddalena, Pasqualino and Carella, Antonio and Borbone, Fabio and Roviello, Antonio (2009) Two-photon patterning of a polymer containing Y-shaped azochromophores. [Pubblicazione in rivista scientifica]Full text not available from this repository.
|Item Type:||Pubblicazione in rivista scientifica|
|Uncontrolled Keywords:||photonic, azo-polymers, two photon absorption, SRG|
|Date Deposited:||21 Oct 2010 06:56|
|Last Modified:||30 Apr 2014 19:43|
We report on the patterning of the free surface of azo-based polymer films by means of mass migration driven by one- or two-photon absorption. A symmetric donor-acceptor-donor structured Y-shaped azochromophore is specifically synthesized to enhance two-photon absorption in the polymer. The exposure of the polymer film to a focused laser beam results in light-driven mass migration for both one- and two-photon absorptions. Features with subdiffraction resolution (250 nm) are realized and the patterning dynamics is investigated as a function of the light dose. Furthermore, functional photonic structures, such as diffraction gratings with periods ranging between 0.5 and 2.0 μm, have been realized.
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