Caumont M. – TechConnect Briefs

Local diffuse light scattering and surface inspection

Caumont M., Bacsa W.S., University Paul Sabatier, FR

Overlap of the incident and scattered field from local surface non-uniformities lead to lateral standing waves which can be mapped using a scanning optical probe in collection mode. The lateral standing waves form diffraction fringes [...]

Cubic and oriented Ag nano-particles by high vacuum evaporation

Berner D., Zuppiroli L., Caumont M., Bacsa W.S., University Paul Sabatier, FR

Optical properties of metal nanoparticles depend strongly on size and shape. Controlling these parameters implies improving the control of their optical properties. Metal nanoparticles find applications in photonics, biological labeling and catalysis. A number of [...]

Optical Surface Diffraction and Improved Lateral Resolution

Bacsa W.S., Caumont M., CNRS, UPS, BU, US

Optical coherence plays an important role in the local field in the vicinity of surfaces where the incident and scatter field overlap (1). While phase differences are small in the optical nearfield, the longitudinal component [...]

Local Optical Field in the Neighborhood of Structured Surfaces: Phase Singularities and Talbot Effect

Levine B., Caumont M., Amien C., Chaudret B., Dwir B., Bacsa W.S., LPST Université Paul Sabatier, FR

We have probed the local optical field in the vicinity of structured surfaces to observe optical coherence effects. We have used a sub -wavelength sized optical fiber probe to map the local field of microgratings [...]