Terahertz emission from a weakly-coupled GaAs/AlGaAs superlattice biased into three different modes of current self-oscillations
| Autor: | I. V. Pentin, Gregory Goltsman, G. K. Rasulova |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Physics Oscillation business.industry Terahertz radiation Superlattice Chaotic General Physics and Astronomy 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences lcsh:QC1-999 Quasiperiodic function Condensed Matter::Superconductivity 0103 physical sciences Optoelectronics Current (fluid) 0210 nano-technology business Gaas algaas lcsh:Physics Voltage |
| Zdroj: | AIP Advances, Vol 9, Iss 10, Pp 105220-105220-8 (2019) |
| ISSN: | 2158-3226 |
| Popis: | Radio-frequency modulated terahertz (THz) emission power from weakly-coupled GaAs/AlGaAs superlattice (SL) has been increased by parallel connection of several SL mesas. Each SL mesa is a self-oscillator with its own oscillation frequency and mode. In coupled non-identical SL mesas biased at different voltages within the hysteresis loop the chaotic, quasiperiodic and frequency-locked modes of self-oscillations of current arise. THz emission was detected when three connected in parallel SL mesas were biased into the frequency-locked and quasiperiodic modes of self-oscillations of current, while in the chaotic mode of those it falls to the noise level. |
| Databáze: | OpenAIRE |
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