Concept

Dissipation factor

Related publications (80)

Crossover from capacitive to pseudoinductive charge-relaxation in organic/polymeric light-emitting diodes

In this work we propose a phenomenological microscopic approach to deal with pseudoinductive charge-relaxation processes (named also as negative capacitance phenomena) in organic molecules (tris-8-hydroxyquinoline-aluminum) and polymeric [poly(2-metoxy-5-( ...

AIP2005

Submicrometer all-optical digital memory and integration of nanoscale photonic devices without isolators

Hatice Altug

In this paper, the authors introduce multibit all-optical memory devices in nanostructured photonic-crystal circuits using only intrinsic nonresonant optical nonlinearities of semiconductors. Introduced devices can record incoming pulses at speeds of 10 Gb ...

2004

Intrinsic and extrinsic loss contributions in SrTiO3 thin films at microwave frequencies

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

The behavior of dielectric loss in SrTiO3 thin films at different microwave frequencies under the dc bias voltage applied is analyzed. Two types of differently processed SrTiO3 thin films (as deposited and oxygen-annealed) deposited by the pulse laser depo ...

2004

Dielectric response and structural features of Pb(Sc1/2Ta1/2)O-3 (PST) sol-gel derived thin films

Nava Setter, Paul Muralt, Alexander Tagantsev, Marco Cantoni, Kyle Brinkman

Relaxor Pb(Sc-12/Ta-1/2)O-3 (PST) thin films have been prepared using mixed alkoxide and acetate precursors on TiO2/Pt/TiO2/SiO2/Si substrates. Relaxor behavior as evidenced by frequency dispersion of the permittivity as a function of temperature was obser ...

2004

Dielectric spectroscopy in a micromachined flow cytometer: theoretical and practical considerations

Philippe Renaud, Arnaud Bertsch, Shady Didier Gawad, Urban Seger, Karen Cheung

We propose a model to determine the influence of different cell properties, such as size, membrane capacitance and cytoplasm conductivity, on the impedance spectrum as measured in a microfabricated cytometer. A dielectric sphere of equivalent complex permi ...

2004

Micromachined Strip Line with SU-8 as the Dielectric

Mona Julia Katharina Klein

For the first time this paper presents strip lines fabricated using SU-8 as the dielectric material. It shows the complete fabrication process of micromachined strip lines with a total height of 35.5 um as well as their characterization by on-wafer S-param ...

2003

Modeling the effect of water diversion on the temperature of mountain streams

Alfred Johny Wüest

Water diversion for hydroelectric power generation impacts the temperature of mountain streams. Such changes are estimated by using a coupled one-dimensional dead-zone heat balance model. In very steep river sections, the dissipation of kinetic energy is t ...

Asce-Amer Soc Civil Engineers2003

Sol-gel derived Pb(Sc0.5Nb0.5)O-3 thin films: Processing and dielctric properties

Nava Setter, Dragan Damjanovic, Ji Hyun Kim, Kyle Brinkman

Relaxor Pb(Sc1/2Nb1/2)O-3 (PSN) thin films without pyrochlore phase were processed from the modified alkoxide solution precursors. The preparation of single phase PSN thin films has a narrow processing window due to the appearance of an undesirable pyrochl ...

2002

Investigation of electrical degradation effects in ferroelectric thin film based tunable microwave components

Nava Setter, Alexander Tagantsev, Konstantin Astafiev

The impact of electrical stressing on the microwave performance of the SrTiO3 films deposited onto different substrates (MgO and LaAlO3) by pulsed laser deposition has been investigated. The most important characteristics of the tunable microwave component ...

2002

Performance analysis and optimization of the travelling wave ultrasonic motor

Yves Perriard, Matteo Bullo

We will present a method allowing to evaluate the mechanical performances (torque, speed, mechanical power, dissipated losses in the surface of contact between stator and rotor) of the travelling wave ultrasonic motors. The visualization of the motor chara ...

2002

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