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Université de Neuchâtel

Apertureless Scanning near-Field Optical Microscope Probe for Transmission Mode Operation

Aeschimann, Laure ; Stauffer, Urs (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1765.

In addition to providing optical imaging at the subwavelength scale with high resolution topography, a main ad-vantage of scanning near-field optical microscopy (SNOM) is its capability to benefit from the various contrast mechanisms of conventional optical microscopy. However, broad application of SNOM suffers from the difficulty of producing inexpensive probes of high reproducible quality. The...

Université de Neuchâtel

Aspects of the synthesis and characterization of diamond and diamond like carbon films

Alers, Paul ; De Rooij, Nicolaas-F. (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th. 1952.

The present thesis is the result of 15 years of continues efforts. The research work started in 1991 and has been completed by a final publication in 2005. The content of the thesis is composed of introductory parts (giving the reader an introduction into the later to be discussed subject) and articles published by the author. At this point the author would like to draw the attention to the fact...

Université de Neuchâtel

Dextran based polymers derived surfaces : characterization by attenuated total reflection infrared (ATR-IR) spectroscopy and investigation of protein-carbonhydrate interactions

Angeloni Suter, Silvia ; Bürgi, Thomas (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; Th 2027.

Sensitive surfaces imply responsive elements lodged onto a carrier which eventually allows for reaction, recognition and detention. Interfaces require fine tuning for response performance optimization. Observation needs to be focused on the two media common boundary. Currently, dextran based polymers are still a major class of tunable materials for surface modifications. To simply and...

Université de Neuchâtel

Microélectrodes pour mesures SECM et ECSTM combinées

Auger, Vincent ; Koudelka, Milena (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2003 ; 1728.

Dans le contexte actuel de la recherche, beaucoup d'efforts sont réalisés dans l'établissement de nouveaux outils d'investigation dans les domaines des systèmes biologiques. Ceci passe également dans la combinaison de techniques existante afin d'étudier sur un plan multimodal les échantillons. Ce travail de thèse s'inscrit dans cette problématique. Ont été développés une plate-forme...

Université de Neuchâtel

Real-time GNSS software receiver optimized for general purpose microprocessors

Baracchi-Frei, Marcel ; Farine, Pierre-André (Dir.) ; Botteron, Cyril (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2010.

A satellite navigation system (like GPS) allows an user to determine its own position everywhere and anytime on Earth. The process of calculating the position is relatively simple (use of trilateration). The main issue is to obtain and decode the transmitted information and to estimate accurately the Time Of Arrival (TOA) of the signals as they lie below the thermal noise floor. A technique...

Université de Neuchâtel

Real-time photon-noise limited optical coherence tomography based on pixel-level analog signal processing

Beer, Stephan ; Seitz, Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1871.

This thesis presents the development of a CMOS smart imager for real-time optical coherency tomography (OCT). OCT, a measuring technique based on low-coherence interferometry, allows the acquisition of three-dimensional pictures of discontinuities in the refractive index of the sample. Due to the achieved depth resolution in the micrometer range, it has gained a lot of impact not only for many...

Université de Neuchâtel

Wafer sawing processes : from microscopic phenomena to macroscopic properties

Bidiville, Adrien ; Ballif, Christophe (Dir.) ; Rooij, Nico de (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2010.

The majority of the solar modules are based on crystalline silicon (c-Si) wafers. Whereas the c-Si technology can offer a high efficiency, its main drawback (compared to traditional means to produce electricity) is the cost. The wafers account for one third of the total module cost, as high purity (thus expensive) silicon is required. One way to decrease the solar electricity cost is to decrease...

Université de Neuchâtel

Properties of chiral self-assembled monolayers at the solid-liquid interface investigated by FT-IR ATR spectroscopy

Bieri, Marco ; Bürgi, T (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 1926.

The main distinctive feature of modern surface science is that it deals with single crystal surfaces, which are well-defined from the viewpoint of their structure and composition. However, for the preparation of crystal surfaces and their analysis, the requirement of UHV equipment greatly limits applications. While atomically clean surfaces analyzed under artificial measurement conditions still...

Université de Neuchâtel

Polarization Optics of Periodic Media

Bohley, Christian ; Dändliker, René (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1749.

The thesis describes different approaches for the simulation of light propagation in anisotropic media. It will focus, especially, on polarization effects in anisotropic media with periodic structure. The work gives shortly a theoretical background with some essential considerations for polarization optics. This includes Maxwell's equations, the explanation of matrix concepts for optical elements...