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Browsing Articole din publicaţii internaţionale by Subject "oscillators"

Browsing Articole din publicaţii internaţionale by Subject "oscillators"

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  • Large oscillator strength excitons in PbGa2S4 crystals 
    SYRBU, N. N.; PARVAN, V. I.; URSAKI, V. V. (ELSEVIER, 2012)
    Exciton states with a large oscillator strength (transverse–longitudinal splitting of 50meV) and binding energy of 290meV have been observed in PbGa2S4 crystals. The ground exciton states are stable up to the room temperature. ...
  • Mode transitions in distributed-feedback tapered master-oscillator power-amplifier: theory and experiments 
    RADZIUNAS, Mindaugas; TRONCIU, Vasile Z.; BANDELOW, Uwe; LICHTNER, Mark; SPREEMANN, Martin; WENZEL, Hans (Springer Nature Switzerland, 2008)
    Theoretical and experimental investigations have been carried out to study the spectral and spatial behavior of monolithically integrated distributed-feedback tapered master-oscillators power-amplifiers emitting around 973 ...
  • Operation of resonant-tunnelling oscillators beyond tunnel lifetime limit 
    FEIGINOV, M.; SYDLO, C.; COJOCARI, O.; MEISSNER, P. (IOP Publishing, 2011)
    The tunnel lifetime of the electrons in the quantum well of a resonant-tunnelling diode (RTD) is usually assumed to be imposing an inherent fundamental limitation on the operating frequencies of RTD oscillators. Here, we ...
  • Operation of resonant-tunnelling-diode oscillators beyond tunnel-lifetime limit at 564 GHz 
    FEIGINOV, M.; SYDLO, C.; COJOCARI, O.; MEISSNER, P. (IOP Publishing, 2012)
    We present resonant-tunnelling-diode (RTD) oscillators, which are operating at frequencies up to 564 GHz. Due to heavy doping of the collector side of our diodes, the oscillators are operating beyond the tunnel-lifetime ...
  • Resonant-tunnelling diodes for THz applications 
    FEIGINOV, Michael; SYDLO, Cezary; COJOCARI, Oleg; MEISSNER, Peter (Society of Photo-Optical Instrumentation Engineers, SPIE, 2012)
    We investigate experimentally resonant-tunnelling-diode (RTD) oscillators, which are based on RTDs with heavily doped collector. We demonstrate that such RTD oscillators can work at frequencies, which are far beyond the ...
  • Resonant-tunnelling-diode oscillators operating at frequencies above 1.1 THz 
    FEIGINOV, Michael; SYDLO, Cezary; COJOCARI, Oleg; MEISSNER, Peter (American Institute of Physics, 2011)
    We present resonant-tunnelling-diode (RTD) oscillators operating at the fundamental frequency of 1111 GHz. We show that our RTDs and RTD oscillators have much room for further improvement of their parameters and for further ...
  • RTD-based THz-MIC by Film-Diode technology 
    COJOCARI, Oleg; SYDLO, Cezary; FEIGINOV, Michael; MEISSNER, Peter (IEEE, 2012)
    This work aims at development of extremely compact and low-cost THz sources. Resonant-tunneling diode (RTD) is monolithically integrated with planar resonator and Vivaldi antenna on transferred membrane-substrate by ...
  • THz Electronics 
    FEIGINOV, Michael; GONZALO, Ramón; MAESTROJUÁN, Itziar; COJOCARI, Oleg; HOEFLE, Matthias; LIMITI, Ernesto (John Wiley & Sons, Ltd, 2005)
    Summary Several key topics in THz electronics are discussed. We describe the operating principles, limitations, and state-of-the-art of resonant-tunnelling diodes (RTDs) and THz RTD oscillators. Furthermore, THz fundamental ...

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