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Lineare und nichtlineare Nanoplasmonik

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MERLEIN, Jörg, 2008. Lineare und nichtlineare Nanoplasmonik [Dissertation]. Konstanz: University of Konstanz

@phdthesis{Merlein2008Linea-5311, title={Lineare und nichtlineare Nanoplasmonik}, year={2008}, author={Merlein, Jörg}, address={Konstanz}, school={Universität Konstanz} }

terms-of-use 2008 Merlein, Jörg application/pdf Linear and nonlinear nano-plasmonics 2011-03-24T14:54:50Z deu Lineare und nichtlineare Nanoplasmonik This work describes the fabrication and optical characerisation of metal nanoparticles. Gold-nanoparticles fabricated by kolloidal lithography could be manipulated on a surface using an atomic force microscope (AFM). Synthetically manufactored metal nanoparticles showed the same behaviour and could be manipulated with nanometer precision over a distance larger than 100 nm.<br />Also rotations along the axis perpendicular to the surface are possible with the same accuracy.<br />Moreover the optical properties of nanoparticles were messured. Kolloidal lithography and electronbeam lithography were used to produce so-called bowtie antennas. Using darkfield spectroscopy the resonance of the antenna could be determined. The resonances were meassured for different feedgap sizes. The spectrum showed a redshift of the resonance when decreasing the feedgap of the antenna. Kolloidal lithography enables us to produce gold-bowtie-antennas without the use of chromium. This makes it possible to manipulate those antennas on the surface allowing the meassurement to be performed on the same antenna while varying the feedgap. These meassurements reveal two resonances. These two resonances result from the tilted sidewalls of the antennas. The longer wavelength mode forms when the two surfaceplasmons at the the glas/gold interface of each particle interact. This leads to a redshift of the mode when the feedgap decreases because the interaction of the two surface plasmons increases. The two surfaceplasmons at the gold/air interface do not interact due to the bigger separation.<br />The last part of the thesis presents the nonlinear optical properties of an ensemble of gold nanoparticles fabricated by kolloidal lithography.<br />The continuum generated by this ensemble consists of three parts: the first part emerged from selfphase modulation (SPM), followed by a second part resulted from Two Photon Photolumenescence (TPPL) and the third part is Second Harmonic Generation (SHG). Merlein, Jörg 2011-03-24T14:54:50Z

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