Université de Neuchâtel

Flip chip bonding technologies for hybrid integration

Fretz, Mark ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2114.

Hybrid integration and especially the packaging of microelectromechanical systems (i.e. MEMS) cannot rely on standardised packaging solutions due to the diversity of microsystems. As an example, the packaging requirements of a pressure sensor are different from that of an accelerometer. Usually pressure sensors do not require a special sealing, whereas accelerometers need to be hermetically...

Université de Neuchâtel

Advanced passive micro-optical elements

Ruffieux, Patrick ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2008 ; Th.2023.

Micro-optical elements are optical elements having size or details in the range of the micrometer scale. The emergency of such elements is strongly linked to the development made in the fabrication techniques during the nineties to follow the still actual trend of miniaturization. From this time it has been convenient to separate micro-optical element having refractive or reflective optical...

Université de Neuchâtel

Polymer multilayer photonic micro- and nanostructures with tailored spectral properties

Jaquet, Sylvain ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 2014.

Amazing and beautiful optical effects are present in Nature. Some examples are the iridescent colors produced by peacocks, butterflies and beetles. While the simulations of some of these structures have already been realized, only a few elements have been fabricated. We are interested to understand and to reproduce some of these amazing optical properties. Applications such as security or...

Université de Neuchâtel

Nanostructuring of surfaces for optical and visual security applications using lithography techniques

Weiteneder, Christophe ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; Th.1971.

Nowadays, the use of micro- or nano-patterned surfaces is well established in wide fields of science and in numerous applications in the industry. Periodic surface-relief profiles with dimensions in the wavelength range of the light can act as diffractive optical elements but moreover, the regular pattern can also modify physical properties of a material’s surface. In this dissertation, we...

Université de Neuchâtel

Passive and active two-dimensional photonic crystal components

Märki, Iwan ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1932.

Photonic crystals are periodic dielectric structures having periodicity of the order of the wavelength. Consequently, they offer the ability to control the propagation of electromagnetic waves in a similar way as the periodic potential aspects the electron motion in a semiconductor crystal. By choosing the parameters of the photonic crystal, desired dispersion characteristics such as band gaps...

Université de Neuchâtel

Advanced label-free biochemical sensors based on integrated optical waveguide gratings : theory, modeling, design and characterization

Cottier, Kaspar ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1760.

Sensors based on waveguide gratings have proved their suitability to high sensitivity bio-chemical sensing tasks. Application fields include medical diagnostics, pharmaceutical drug screening, environmental sensing and food quality control. Recent developments led to instruments, which excel in sensitivity and robustness. The present work introduces novel approaches for modeling such sensor...

Université de Neuchâtel

Diffractive and refractive lenses for hard x-rays with ultra-high efficiencies

Nöhammer, Bernd ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1748.

Focusing of x-rays is an essential pre-requisite for many synchrotron based measurement techniques. In this work, multi-level silicon zone plates and planar refractive lenses made from diamond and silicon have been developed, aiming for focusing applications in the hard x-ray range, i.e. for photon energies between 10 and 50 keV. The first part of the work deals with diffractive x-ray lenses...

Université de Neuchâtel

Resonant grating filters for microsystems

Niederer, Guido ; Herzig, Hans-Peter (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1745.

In the present work we report on the design and characterization of a tunable optical filter for use in a compact add-drop multiplexer. The optical filter is a resonant grating filter (RGF) consisting of a planar waveguide and a grating parallel to the surface. A resonance occurs when the incoming light is diffracted by the grating and matches a mode in the waveguide. Numerous aspects of the...