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 |
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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 |
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