Publications de Vincent Paeder

Resonant absorption of a chemically sensitive layer based on waveguide gratings

Hans Peter Herzig, Vincent Paeder, Laurent Davoine, Marc Schnieper, Guillaume Basset

A colorimetric sensor providing a direct visual indication of chemical contamination was developed. The sensor is a combination of a chemically sensitive dye layer and a resonant waveguide grating. Enhancement of the light absorption by the photonic struct ...

Optical Society of America2013

Investigation of Protein Aggregation with a Bloch Surface Wave Sensor

Hans Peter Herzig, Vincent Paeder, Lubos Hvozdara, Valeria Musi, Sara Santi

We present a study of the dynamics of protein aggregation using a common path heterodyne Bloch surface wave label-free sensing scheme. We demonstrate the ability to detect, during thermal incubation, the first early dynamics events of protein aggregation a ...

2011

Demonstration of superprism effect in silicon pillar 2-D photonic crystal infiltrated with liquid crystals

Hans Peter Herzig, Vincent Paeder, Pierre-Yves Baroni, Yu-Chi Chang

Superprism-based deflection of an optical beam is observed in a photonic crystal composed of a triangular lattice of pillars infiltrated with a liquid crystal. The device is based on a Silicon-on-insulator substrate and operates in the telecommunications b ...

2011

Understanding of photocurrent enhancement in real thin film solar cells: towards optimal onedimensional gratings

Christophe Ballif, Hans Peter Herzig, Toralf Scharf, Karin Söderström, Vincent Paeder, Ali Naqavi

Despite the progress in the engineering of structures to enhance photocurrent in thin film solar cells, there are few comprehensive studies which provide general and intuitive insight into the problem of light trapping. Also, lack of theoretical propositio ...

Optical Society of America2011

Bloch Surface Wave Biosensing : Study of Optical Elements for the Early Detection of Protein Aggregation

Vincent Paeder

The process of protein aggregation, due to an incorrect protein folding, has very important implications in medicine. An increasing number of pathologies, including Alzheimer's and Parkinson's diseases, are associated unambiguously with the formation of la ...

EPFL2011

Detection of protein aggregation with a Bloch surface wave based sensor

Hans Peter Herzig, Vincent Paeder, Lubos Hvozdara, Valeria Musi, Sylvain Herminjard

We present the innovative application of a Bloch surface wave based sensor to the detection of protein aggregation. In Hen Egg White Lysozyme (HEWL) solutions, aggregates are discriminated from the monomeric forms in a label-free detection scheme. ...

Elsevier2011

Single Mode Mid-infrared Waveguide for Evanescent Sensor Scheme in Liquids

Hans Peter Herzig, Vincent Paeder, Lubos Hvozdara, Philip Wägli, Yu-Chi Chang

A Si/Ge based, single mode, mid-infrared optical waveguide, is used as an evanescent sensor in liquid matrix. The selectivity is achieved by the use of quantum cascade lasers (QCLs) tuned to the maximum absorption of a given analyte. The cocaine detection ...

2011

An RCWA Analysis of Solar Cell Back Reflectors: Comparison between Modelling and Experiment

Christophe Ballif, Hans Peter Herzig, Franz-Josef Haug, Toralf Scharf, Karin Söderström, Vincent Paeder, Ali Naqavi

We present a comparison between spectrally-resolved reflection measurements of gratings and theoretical predictions from RCWA approach. Diffraction intensities vary significantly with polarization, and surface plasmon absorption is observed around the onse ...

2010

Switchable photonic crystal cavity by liquid crystal infiltration

Hans Peter Herzig, Toralf Scharf, Vincent Paeder, Pierre-Yves Baroni, Qing Tan, Armando Cosentino

We report on the fabrication and optical characterization of a switchable photonic crystal nanocavity actuated by liquid crystals. This device acts as a filter presenting a transmission peak around the telecom wavelength λ = 1550 nm. Passing from the isotr ...

European Optical Society2010