High resolution UV spectroscopy and laser-focused nanofabrication
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Publication year
2005Author(s)
Publisher
S.l. : s.n.
ISBN
9090196714
Number of pages
172 p.
Annotation
RU Nijmegen, Physics, 08 september 2005
Promotor : Rasing, T.H.M. Co-promotores : Meerts, W.L., Schmitt, M.
Publication type
Dissertation
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Organization
Spectroscopy of Solids and Interfaces
Subject
Scanning Probe MicroscopyAbstract
This thesis combines two at first glance different techniques: High Resolution Laser Induced Fluorescence Spectroscopy (LIF) of small aromatic molecules and Laser Focusing of atoms for Nanofabrication. The thesis starts with the introduction to the high resolution LIF technique of small aromatic molecules seeded in molecular beams. It contains a description of the experimental setup and describes the upgrade from the intra-cavity frequency doubling of the 'visible' dye laser to the doubling in an external resonator. This greatly facilitates the experiments by decoupling the dye laser operation from the UV generation step and by increasing the obtained UV power available for the experiment. The latter enables studies of molecules previously unaccessible for the LIF due to their too weak fluorescence signal (like for example bio-molecules). The introduction is closed with the description of the extremely useful method of automated assignment of the rotationally resolved LIF spectra by genetic algorithm (GA). In the following chapters: 2 to 6, different high resolution LIF studies on molecules and molecular clusters are presented, namely the weakly bound van der Waals complexes of tetracene with Ar and Kr atoms (Chapter 2), o-, m-cresols (Chapter 3), p-cresol (4-methylphenol) and its binary water cluster (Chapter 4), resorcinol (Chapter 5) and 4,4'-dimethylaminobenzonitrile (DMABN, Chapter 6). Every molecule presents some interesting points, which are underlined in aforementioned chapters.Chapter 7 contains an introduction to the laser-focused nanofabrication technique. It briefly describes the used experimental setup, laser cooling and focusing of atoms and it also gives a short overview of what other groups have done in the area. It finishes with some important characteristics of chromium and iron - the elements used by me in the laser-focused nanofabrication experiments. The last two chapters present nanofabrication of an intriguing quasiperiodic chromium structures (Chapter 8) and extension of the technique to another technologically important material - iron (Chapter 9). Both experiments provided technical challenges and after realization, if still perfected, can promise materials with interesting physical properties: complete photonic band gap - quasiperiodic chromium structures and extremely coherent ferromagnetic iron nanolines.
This item appears in the following Collection(s)
- Academic publications [238586]
- Dissertations [13460]
- Electronic publications [122858]
- Faculty of Science [34995]
- Open Access publications [97839]
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