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Your search keyword '"Paul, Douglas J."' showing total 4 results
Start Over Author "Paul, Douglas J." Journal applied physics letters
4 results on '"Paul, Douglas J."'

1. THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures

Author

Stark, David, primary, Mirza, Muhammad, additional, Persichetti, Luca, additional, Montanari, Michele, additional, Markmann, Sergej, additional, Beck, Mattias, additional, Grange, Thomas, additional, Birner, Stefan, additional, Virgilio, Michele, additional, Ciano, Chiara, additional, Ortolani, Michele, additional, Corley, Cedric, additional, Capellini, Giovanni, additional, Di Gaspare, Luciana, additional, De Seta, Monica, additional, Paul, Douglas J., additional, Faist, Jérôme, additional, and Scalari, Giacomo, additional

Published
2021
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2. Room temperature operation of n-type Ge/SiGe terahertz quantum cascade lasers predicted by non-equilibrium Green's functions

Author

Grange, Thomas, primary, Stark, David, additional, Scalari, Giacomo, additional, Faist, Jérôme, additional, Persichetti, Luca, additional, Di Gaspare, Luciana, additional, De Seta, Monica, additional, Ortolani, Michele, additional, Paul, Douglas J., additional, Capellini, Giovanni, additional, Birner, Stefan, additional, and Virgilio, Michele, additional

Published
2019
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4. THz intersubband electroluminescence from n-type Ge/SiGe quantum cascade structures

Author

Monica De Seta, Michele Montanari, Luca Persichetti, Thomas Grange, Mattias Beck, G. Scalari, David Stark, Michele Virgilio, Sergej Markmann, Chiara Ciano, Jérôme Faist, Stefan Birner, Muhammad M. Mirza, Luciana Di Gaspare, Cedric Corley, Douglas J. Paul, Giovanni Capellini, Michele Ortolani, Stark, David, Mirza, Muhammad, Persichetti, Luca, Montanari, Michele, Markmann, Sergej, Beck, Mattia, Grange, Thoma, Birner, Stefan, Virgilio, Michele, Ciano, Chiara, Ortolani, Michele, Corley, Cedric, Capellini, Giovanni, Di Gaspare, Luciana, De Seta, Monica, Paul, Douglas J., Faist, Jérôme, and Scalari, Giacomo

Subjects
Materials science, Physics and Astronomy (miscellaneous), Terahertz radiation, FOS: Physical sciences, Applied Physics (physics.app-ph), 02 engineering and technology, Chemical vapor deposition, Electroluminescence, 01 natural sciences, 7. Clean energy, Molecular physics, 0103 physical sciences, Quantum, Quantum well, 010302 applied physics, Settore FIS/03, Heterojunction, Physics - Applied Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, terahertz, electroluminescence, quantum wells, quantum cascade laser, 3. Good health, Cascade, 0210 nano-technology, Order of magnitude, Physics - Optics, Optics (physics.optics)
Abstract

© 2021 Author(s). We report electroluminescence originating from L-valley transitions in n-type Ge/Si0.15Ge0.85 quantum cascade structures centered at 3.4 and 4.9 THz with a line broadening of Δ f / f ≈ 0.2. Three strain-compensated heterostructures, grown on a Si substrate by ultrahigh vacuum chemical vapor deposition, have been investigated. The design is based on a single quantum well active region employing a vertical optical transition, and the observed spectral features are well described by non-equilibrium Green's function calculations. The presence of two peaks highlights a suboptimal injection in the upper state of the radiative transition. Comparison of the electroluminescence spectra with a similar GaAs/AlGaAs structure yields one order of magnitude lower emission efficiency. ISSN:0003-6951 ISSN:1077-3118

Published
2021
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