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Dissipative soliton protocols in semiconductor microcavities at finite temperatures

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Temperature dependence of the conductivity in large-grained boron-doped ZnO films

Christophe Ballif, Arvind Shah, Sylvie Faÿ

The temperature dependence of the conductivity is investigated as a function of boron doping in large-grained, degenerate polycrystalline ZnO films prepared by low-pressure chemical vapor deposition. Carrier transport in undoped and lightly doped films is ...

2007

Temperature-controlled martensitic phase transformations in a model NiAl alloy

Reversible martensitic phase transformations in a partially disordered Ni-Al alloy within the composition range from 60 to 65 at. % of Ni are investigated using molecular dynamics simulation. During a complete temperature cycle a wide hysteresis in enthalp ...

2006

Distributed fiber-optic temperature sensing for hydrologic systems

Luc Thévenaz, Wolf Hendrik Huwald, Marc Parlange, Nicolaas Cornelis van de Giesen

Instruments for distributed fiber-optic measurement of temperature are now available with temperature resolution of 0.01°C and spatial resolution of 1 m with temporal resolution of fractions of a minute along standard fiber-optic cables used for communicat ...

2006

Coupled atomistic/discrete dislocation simulations of nanoindentation at finite temperature

William Curtin, Ronald Earle Miller

Simulations of nanoindentation in single crystals are performed using a finite temperature coupled atomistic/continuum discrete dislocation (CADD) method. This computational method for multiscale modeling of plasticity has the ability of treating dislocati ...

2005

Polariton amplification in semiconductor microcavities

Benoît Marie Joseph Deveaud, Stefan Kundermann, Cristiano Ciuti, Michele Saba

Microcavity exciton polaritons, the fundamental optical excitations of semiconductor microcavities with quantum wells inside, have been proposed as promising candidates for observing stimulated scattering, condensation and other phenomena related to the bo ...

2003

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2003

Phonon anomaly at the charge ordering transition in 1T-TaS2

Giorgio Margaritondo, László Forró, Richard Gaal, Helmuth Berger

The infrared reflectance of the transition-metal chalcogenide 1T-TaS2 has been measured at temperatures from 30 K to 360 K over 30-45 000 cm(-1) (4 meV-5.5 eV). The optical conductivity was obtained by Kramers-Kronig analysis. At 360 K only modest traces o ...

2002

Thermal optimization of micro-hotplates that have a silicon island

Nico de Rooij, Danick Briand

We have performed thermal measurements and electrothermal simulations (finite element modelling) with the aim of optimizing the power consumption and the temperature distribution of micro-hotplates for gas-sensing applications. A silicon island was added u ...

2002

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We engineer a semiconductor microcavity through an appropriate choice of geometry and materials in order to maximise the exciton-photon coupling. The polaritonic nonlinearities in such devices survive at high temperatures and high excitation densities. We ...

2002

Phonon replica dynamics in high quality GaN epilayers and AlGaN/GaN quantum wells

Nicolas Grandjean

We present an experimental study of the exciton and phonon replica dynamics in high quality GaN epilayers and AlGaN/GaN quantum wells (QW) by means of picosecond time-resolved photoluminescence (PL) measurements. A non-exponential decay is observed both at ...

2001