تقرير
Tunable ultrabroadband hybrid THz emitter combining a spintronic THz source and a GaSe crystal
| العنوان: | Tunable ultrabroadband hybrid THz emitter combining a spintronic THz source and a GaSe crystal |
|---|---|
| المؤلفون: | Alostaz, Afnan, Gueckstock, Oliver, Tong, Jungwei, Kredl, Jana, In, Chihun, Münzenberg, Markus, Seifert, Tom S. |
| سنة النشر: | 2023 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Condensed Matter - Materials Science |
| الوصف: | Linear terahertz time-domain spectroscopy (THz-TDS) is a sensitive probe for material characterization including thickness measurements of thin layers. These applications critically rely on a sufficiently large bandwidth, which is not straightforwardly available in typical THz-TDS systems. Here, we introduce a hybrid THz-emitter concept based on a spintronic THz emitter that is deposited onto a thin freestanding GaSe nonlinear crystal. By tuning the parameters of this hybrid emitter, we generate an ultrabroadband spectrum covering the full range from 1 to 40 THz without any gaps at high spectral amplitudes, resulting in ultrashort THz-pulse durations of only 32 fs. Finally, we demonstrate the straightforward tunability of the carrier-envelope phase from unipolar or bipolar THz pulses with ultrashort duration. |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2310.12012 |
| رقم الأكسشن: | edsarx.2310.12012 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |