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Publications associées (235)

Near-Infrared Fluorescent Sensors based on Single-Walled Carbon Nanotubes for Life Sciences Applications

A review. Many properties of single-walled carbon nanotubes (SWCNTs) make them ideal candidates for sensors, particularly for biol. systems. Both their fluorescence in the near-IR range of 820-1600 nm, where absorption by biol. tissues is often minimal, an ...

2011

A novel class of coherent light emitters: polariton lasers

Nicolas Grandjean, Raphaël Butté

The specificities of polariton lasers-a new generation of coherent light-emitting devices where the relaxation of the bosonic quasiparticles responsible for the light emission, the polaritons, is stimulated whereas the photon emission process issued from t ...

2011

Fluorophore-doped xerogel antiresonant reflecting optical waveguides

Jürgen Brugger, Victor Javier Cadarso Busto

Rhodamine B and Alexa Fluor 430 fluorophores have been used as doping agents for xerogel waveguides defined over an antiresonant (ARROW) filter. This configuration has a significant level of integration, since it merges the waveguide, the light emitter and ...

Optical Society of America2011

Second harmonic nanoparticles in imaging applications

Demetri Psaltis, Ioannis Papadopoulos, Ye Pu, Rachel Grange, Chia-Lung Hsieh, Jae-Woo Choi, Xin Yang

Nanocrystals with second harmonic response is a new class of nonlinear optical nanoprobes with dramatically different properties from fluorescent agents. Compared with two-photon fluorescence, second harmonic generation is an ultrafast, lossless, and coher ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2011

Microcolumn with variable axis lens for large scan fields and pixel numbers

Nico de Rooij, Sebastian Gautsch

A microcolumn is presented containing a variable axis lens optimized for large scan fields and pixel numbers with minimal probe sizes for the deflected beam. At beam energy of 1 keV and a working distance of 38 mm the magnifying column can address scan fie ...

Elsevier2011

Hierarchical positioning of gold nanoparticles into periodic arrays using block copolymer nanoring templates

Patrik Willi Hoffmann, Harry Heinzelmann, Li Wang, Raphaël Pugin, Franck Montagne

We report a simple and versatile self-assembly method for controlling the placement of functional gold nanoparticles on silicon substrates using micellar templates. The hierarchical positioning of gold nanoparticles is achieved in one-step during the spont ...

2011

Spatial Heterogeneity of Methane Ebullition in a Large Tropical Reservoir

Alfred Johny Wüest, Bernhard Wehrli

Tropical reservoirs have been identified as important methane (CH4) sources to the atmosphere, primarily through turbine and downstream degassing. However, the importance of ebullition (gas bubbling) remains unclear. We hypothesized that ebullition is a di ...

Amer Chemical Soc2011

Full-wave analysis of photonic-crystal structures with multi quantum well active region

Banafsheh Abasahl

In this paper, a semi-classical formulation for modeling photonic-crystal (PC) structures with a four-layer multi quantum well (MQW) active region is presented. The formulation treats the electromagnetic fields as a classical entity, while employing the qu ...

2010

Simple source for broadband Brillouin slow light in optical fibers

Luc Thévenaz, Sang Hoon Chin

Spontaneously broadened emission from a distributed feedback laser diode perated just above threshold is used as a pump source in Brillouin slow light systems. The pump spectrum could this way be extended to several GHz. ...

Ieice-Inst Electronics Information & Communication Engineers, Kikai-Shinko-Kaikan Bldg 103, 5-8, Shibakoen 3 Chome, Minato-Ku, Tokyo, 105-0011, Japan2010

Exciton Formation, Relaxation, and Decay in PCDTBT

Natalie Renuka Banerji, Eric Vauthey

The nature and time evolution of the primary excitations in the pristine conjugated polymer, PCDTBT, are investigated by femtosecond-resolved fluorescence up-conversion spectroscopy. The extensive study includes data from PCDTBT thin film and from PCDTBT i ...

2010

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