Libero Zuppiroli

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Publications associées (50)

Hybrid inorganic-organic photonic devices

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Laurent Balet, Pascale El-Kallassi, Nicolas Le Thomas

We present the infiltration of semiconductor photonic devices with organic materials. The infiltration procedures are described and validated. In particular, the optical properties of hybrid photonic crystal cavities are studied. ...

EOS2008

Charge transport mechanisms in organic and microcrystalline silicon field-effect transistors

Libero Zuppiroli, Marie-Noëlle Bussac, Steven Konezny

Several organic and inorganic materials have emerged as promising candidates for the active layer of field-effect transistors (FETs) fabricated on flexible substrates. The charge transport models necessary for device optimization in these systems are at di ...

Spie-Int Soc Optical Engineering, Po Box 10, Bellingham, Wa 98227-0010 Usa2007

Quantum coherence and carriers mobility in organic semiconductors

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon

We present a model of charge transport in organic molecular semiconductors based on the effects of lattice fluctuations on the quantum coherence of the electronic state of the charge carrier. Thermal intermolecular phonons and librations tend to localize p ...

2007

Optical tuning of planar photonic crystals infiltrated with organic molecules

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Nicolas Le Thomas, Pascale El-Kallassi

The optical tuning of InP-based planar photonic crystals (PhCs) infiltrated with a photo-responsive liquid crystal system is presented. Photo-induced phase transitions of a liquid crystal blend doped with azobenzene molecules are used to tune the optical r ...

2007

Thermopower measurements on pentacene transistors

Libero Zuppiroli, Marie-Noëlle Bussac, Adrian von Mühlenen

We present the first thermoelectric measurements on pentacene field effect transistors. We report high values of the Seebeck coefficient at room temperature between 240 and 500 micro V/K depending on the dielectric surface treatment. These values are indep ...

2007

Tuneable planar photonic crystals

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Barbara Wild, Liza Carol Andrea Dunbar

2006

Planar photonic crystals infiltrated with liquid crystals: tuning of the optical properties

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Liza Carol Andrea Dunbar, Nicolas Le Thomas

2006

Planar photonic crystals infiltrated with liquid crystals: optical characterization of molecule orientation

Romuald Houdré, Libero Zuppiroli, Rolando Ferrini, Liza Carol Andrea Dunbar, Barbara Wild, Vasily Zabelin

Nematic liquid crystals are infiltrated into InP-based planar photonic crystals. Optical measurements as a function of temperature and polarization are used to study the average director field configuration in the nanometer-size holes: a planar equilibrium ...

Opt. Soc. America2006

Polarization effects in the channel of an organic field-effect transistor

Libero Zuppiroli, Marie-Noëlle Bussac, Jean-David Picon, Hocine Houili

We present the results of our calculation of the effects of dynamical coupling of a charge carrier to the electronic polarization and the field-induced lattice displacements at the gate interface of an organic field-effect transistor (OFET). We find that t ...

American Institute of Physics Inc.2006

Liquid crystal infiltration of InP-based planar photonic crystals

Romuald Houdré, Frank Nüesch, Libero Zuppiroli, Rolando Ferrini, Liza Carol Andrea Dunbar, Barbara Wild

A procedure for the infiltration of planar photonic crystals (PhCs) with liquid crystals (LCs) is presented. InP-based PhCs are infiltrated with the nematic LC-K15 in a specially designed high-vacuum chamber. The infiltration technique is validated and sys ...

AIP2006

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