Jean-Jacques Simon

Optical and electro-optical properties of pulse laser deposited PLZT thin films

Optical and electro-optical properties of pulse laser deposited PLZT thin films are measured using the m-lines technique. Sample preparation is described. Correlation between the deposition process and optical and electro-optical properties is presented.

Electromagnetic field optimization for enhancing photovoltaic efficiency of organic solar cells

The electromagnetic field distribution inside multilayer organic solar cells composed of interpenetrated networks of conjugated polymers is calculated. By enhancing the electromagnetic field in the photoactive region, an increase of the photovoltaic efficiency is expected.

Flat-topped and top-patterned silicon cone gratings for visible and mid infrared antireflective properties

We designed, fabricated and performed optical characterizations on silicon cone gratings demonstrating antireflective properties in the visible and mid-infrared. Optical behavior of flat-topped and top-patterned cones has also been investigated.

Micro-and Nanostructured Optical Thin Films: Potential and Applications

Optical properties of artificially or naturally micro/nano structured thin films are discussed. The modelling of these properties is considered with examples of electromagnetic field distribution and of applications like sensors, integrated optics, solar cells, antireflection, etc.

Optical Optimization of Organic Solar Cells

The electromagnetic field distribution inside multilayer organic solar cells is simulated and optimized. The relative importance of optical, electrical and morphological properties of the different thin films is discussed.

Design and fabrication of infrared anti-reflective Germanium gratings

A germanium grating, working in the infrared at high angles of incidence, has been designed and fabricated using wet anisotropic etching. The reflectance properties are calculated using a modal method and compared with experimental results.

Micro-structured thin-film based photonic crystal for directive thermal sources

A photonic crystal composed of a stack of grid-patterned gold evaporated films and ZnSe films is presented. This structure acting as an infrared light thermal source is simulated, fabricated, and experimentally characterized.

Design and fabrication of biperiodic AR gratings for the infrared

We have designed and fabricated a silicon grating which shows antireflection properties in the [4μm ; 6 μm] spectral region. It is shown both theoretically and experimentally that, even if the refractive index and the grating period are in the extend that a simple homogenization theory can not be used, a substantial broadband antireflection effect can be obtained. The grating was made using a wet anisotropic etching technique. The reflectance was calculated with a modal method and compared successfully with the experimental results. It is shown that the grating reduces the silicon substrate reflectance in the whole [4 μm ; 6 μm] spectral domain by a factor greater than 10.