Nonlinear optical extinction in organic and inorganic nanomaterials
Citation:
James Joseph Doyle, 'Nonlinear optical extinction in organic and inorganic nanomaterials', [thesis], Trinity College (Dublin, Ireland). School of Physics, 2007, pp 139Download Item:
Abstract:
This thesis will focus on the nonlinear optical dissipation of high intensity
nanosecond laser irradiation by polymer-phthalocyanine films and nano-structured
dispersions. The nonlinear optical investigation of a selection of solid-state
polymer-phthalocyanine films is initially presented. Using the straightforward
method of sequentially deposited spin cast phthalocyanine doped polymer films, the
resulting nonlinear optical response was characterized by the use of the open
aperture Z-scan technique. Molecular engineering of metallophthalocyanine
compounds, through both axial and peripheral substitutes has led to an optimisation
the nonlinear optical response of the compound in the nanosecond regime. Effective
optical coefficients with a nonlinear absorption based model are calculated, and
their intensity dependence is investigated. Mechanistic implications of the optical
dissipation are also discussed and examined in three separate case studies. For the
optical limiting experiments the open aperture Z-scan technique was used probing
total transmittance through the sample. The second harmonic, 532nm, of a Qswitched
Nd:YAG laser was used with a pulse repetition rate of 10Hz. The beam
was spatially filtered to remove the higher order modes and tightly focused with a
9cm focal length lens.
Author: Doyle, James Joseph
Advisor:
Blau, WernerPublisher:
Trinity College (Dublin, Ireland). School of PhysicsNote:
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Physics, Ph.D., Ph.D. Trinity College DublinMetadata
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