Sub-Terahertz Monochromatic Transduction with Semiconductor Acoustic Nanodevices - Condensed Matter > Other Condensed MatterReportar como inadecuado




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Abstract: We demonstrate semiconductor superlattices or nanocavities as narrow bandacoustic transducers in the sub-terahertz range. Using picosecond ultrasonicsexperiments in the transmission geometry with pump and probe incident onopposite sides of the thick substrate, phonon generation and detectionprocesses are fully decoupled. Generating with the semiconductor device andprobing on the metal, we show that both superlattices and nanocavities generatespectrally narrow wavepackets of coherent phonons with frequencies in thevicinity of the zone center and time durations in the nanosecond range,qualitatively different from picosecond broadband pulses usually involved inpicosecond acoustics with metal generators. Generating in the metal and probingon the nanoacoustic device, we furthermore evidence that both nanostructuredsemiconductor devices may be used as very sensitive and spectrally selectivedetectors.



Autor: Agnes Huynh INSP, Bernard Perrin INSP, N. D. Lanzillotti Kimura INSP, Bernard Jusserand INSP, A. Fainstein, Aristide Lemaitre LPN

Fuente: https://arxiv.org/



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