Concept
Gradient-index optics
Related publications (103)
Acoustic transmission line metamaterial with negative/zero/positive refractive index
Juan Ramon Mosig, Hervé Lissek, Frédéric Bongard
A one-dimensional acoustic negative refractive index metamaterial based on the transmission line approach is presented. This structure implements the dual transmission line concept extensively investigated in microwave engineering. It consists of an acoust ...
2010Determination of local refractive index variations in thin films by heterodyne interferometric scanning near-field optical microscopy
Patrik Willi Hoffmann, Ali Dabirian, Yury Kuzminykh, Giacomo Benvenuti, Maria-Pilar Bernal
We report on a heterodyne interferometric scanning near-field optical microscope developed for characterizing, at the nanometric scale, refractive index variations in thin films. An optical lateral resolution of 80 nm (lambda/19) and a precision smaller th ...
American Institute of Physics2009Optical tomography with digital holographic microscopy
Christian Depeursinge, Nicolas Pavillon, Florian Charrière
Three-dimensional optical imaging by tomographic techniques is presented, especially with object rotation in a transmission configuration. In digital holographic microscopy, the complex field is measured, which permits either to study transparent objects w ...
EOS2009Large area hole arrays fabricated by a templating method for refractive index sensing
Jürgen Brugger, Harry Heinzelmann, Mona Julia Katharina Klein, Bernard Wenger, Raphaël Pugin
Subwavelength hole arrays in thin gold films were fabricated in a low-cost and parallel fabrication process on 2" wafers. Polystyrene beads were used as an initial pattern template which is transferred into a thin gold film by sputter etching. Hole arrays ...
2009Monitoring of hygrothermal ageing effects in an epoxy resin using FBG sensor: A methodological study
John Botsis, Joël Cugnoni, Dimitrios Karalekas
This study demonstrates the feasibility of using fibre Bragg grating (FBG) sensors to monitor the effects of hygrothermal ageing on the axial strains in a cylindrical epoxy specimen with a centrally located optical glass fibre. A 24 mm long FBG, inscribed ...
Elsevier2009Conducting two-phase silicon oxide layers for thin-film silicon solar cells
Christophe Ballif, Julien Claude Bailat, Andrea Feltrin
We present optical properties and microstructure analyses of hydrogenated silicon suboxide layers containing silicon nanocrystals (nc-SiOx:H). This material is especially adapted for the use as intermediate reflecting layer (IRL) in micromorph silicon tand ...
2009