تقرير
Sub-picosecond acoustic pulses at buried GaP/Si interfaces
| العنوان: | Sub-picosecond acoustic pulses at buried GaP/Si interfaces |
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| المؤلفون: | Ishioka, Kunie, Rustagi, Avinash, Beyer, Andreas, Stolz, Wolfgang, Volz, Kerstin, Hoefer, Ulrich, Petek, Hrvoje, Stanton, Christopher J. |
| المصدر: | Appl. Phys. Lett. 111, 062105 (2017) |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Materials Science |
| الوصف: | We report on the optical generation and detection of ultrashort acoustic pulses that propagate in three-dimensional semiconductor crystals. Photoexcitaiton of lattice-matched GaP layers grown on Si(001) gives rise to a sharp spike in transient reflectivity due to the acoustic pulse generated at the GaP/Si interface and detected at the GaP surface and vice versa. The extremely short width of the reflectivity spike, 0.5 ps, would translate to a spatial extent of 3 nm or 10 atomic bilayers, which is comparable with the width of the intermixing layer at the GaP/Si interface. The reflectivity signals are also modified by quasi-periodic Brillouin oscillations of GaP and Si arising from the acoustic pulses during the propagation in the crystals. The present results demonstrate the potential application of the simple optical pump-probe scheme in the nondestructive evaluation of the buried semiconductor interface quality. Comment: 5 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4997913 |
| URL الوصول: | http://arxiv.org/abs/1612.01239 |
| رقم الأكسشن: | edsarx.1612.01239 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4997913 |
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