Concept

Thermionic emission

Related publications (70)

Hot-Electron-Related Degradation in InAlN/GaN High-Electron-Mobility Transistors

Hot-electron temperature (T-e) in InAlN/GaN high-electron-mobility transistors (HEMTs) was determined using electroluminescence spectroscopy as a function of gate voltage and correlated with the Te distribution determined by hydrodynamic simulations. Good ...

Ieee-Inst Electrical Electronics Engineers Inc2014

Leakage mechanisms in InAlN based heterostructures

Nicolas Grandjean, Jean-François Carlin, Marcel Py, Lorenzo Lugani

We propose a model for leakage currents in Schottky contacts on InAlN/GaN heterostructures based on two distinct tunneling mechanisms. Our modeling relies on structural parameters, in particular, InAlN dielectric constant, interface polarization charges an ...

Amer Inst Physics2014

Large Charge Extraction from Metallic Multifilamentary Nb3Sn Photocathode

Christoph Peter Hauri, Fernando Ardana Lamas

The current density limit for photoemission from metals was measured in an rf photogun to be below 10(9) A/m(2). We have achieved 1.6 x 10(11) A/m(2) by photofield emission from a new type of photocathode made from a metallic-composite, multifilamentary Nb ...

2012

Surface emitting Terahertz Photonic Crystal Quantum Cascade Laser realized by Bragg boundary condition

Romuald Houdré, Jérôme Faist, Zhaolu Diao, Christopher Bonzon

We theoretically and experimentally investigate a band edge Photonic Crystal (PhC) Quantum Cascade Laser (QCL) operating at 3.1 THz. The surface emission is achieved by using a second-order Bragg grating at the PhC tile boundaries. Highly directional surfa ...

Ieee2012

Scanning Tunneling Microscopy and Spectroscopy of Supported Nanostructures

Wolf-Dieter Schneider

Recent advances in low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS) have provided new opportunities for the investigation of the local geometric, electronic, magnetic, and optical properties of nanostructures. This review focuses ...

2012

Thermal carrier emission and nonradiative recombinations in nonpolar (Al,Ga)N/GaN quantum wells grown on bulk GaN

Nicolas Grandjean, Benoît Marie Joseph Deveaud, Etienne François Olivier Giraud, Jean-Daniel Ganière, Pierre Michel Corfdir

We investigate, via time-resolved photoluminescence, the temperature-dependence of charge carrier recombination mechanisms in nonpolar (Al,Ga)N/GaN single quantum wells (QWs) grown via molecular beam epitaxy on the a-facet of bulk GaN crystals. We study th ...

American Institute of Physics2012

Carrier capture into semiconductor quantum dots via quantum wire barriers: Localization and thermionic emission effects

Elyahou Kapon, Pascal Gallo, Qing Zhu, Justyna Szeszko

Carrier transport and capture paths via barriers of different dimensionality in AlGaAs/GaAs quantum wire (QWR)/quantum dot (QD) heterostructures, grown in inverted pyramids, are studied by photoluminescence (PL) spectroscopy. Evidence for thermally activat ...

American Institute of Physics2011

Measurement of nanograin orientations: Application to Cu interconnects

Cyril Cayron

Nowadays the orientation maps of polycrystalline material are necessary for a better understanding of, for example, the formation of voids in the interconnects of modern electronic devices. As new generation of devices has dramatically reduced in size, new ...

2011

Characterization and physical modeling of endurance in embedded non-volatile memory technology

Alexandre Schmid, Yusuf Leblebici, Davide Garetto

Transient and endurance mechanisms in highperformance embedded non-volatile memory flash devices are investigated in detail. An extraction methodology combining measurements on equivalent transistors and flash cells is proposed to discriminate the effects ...

2011

DESIGN AND RESULTS OF A TIME RESOLVED SPECTROMETER FOR THE 5 MeV PHOTO-INJECTOR PHIN

Daniel Egger, Öznur Mete

The CLIC Test Facility 3 (CTF3) drive beam injector should provide high intensity and high quality electron beams. The present installation relies on a thermionic gun followed by a complexRF bunching system. As an upgrade to improve the beam emittance and ...

2010

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