Academic Journal
Determining hot-carrier transport dynamics from terahertz emission
| العنوان: | Determining hot-carrier transport dynamics from terahertz emission |
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| المؤلفون: | Taghinejad, Mohammad, Xia, Chenyi, Hrton, Martin, Lee, Kyu-Tae, Kim, Andrew S., Li, Qitong, Guzelturk, Burak, Kalousek, Radek, Xu, Fenghao, Cai, Wenshan, Lindenberg, Aaron M., Brongersma, Mark L. |
| المصدر: | Science ; volume 382, issue 6668, page 299-305 ; ISSN 0036-8075 1095-9203 |
| بيانات النشر: | American Association for the Advancement of Science (AAAS) |
| سنة النشر: | 2023 |
| الوصف: | Understanding the ultrafast excitation and transport dynamics of plasmon-driven hot carriers is critical to the development of optoelectronics, photochemistry, and solar-energy harvesting. However, the ultrashort time and length scales associated with the behavior of these highly out-of-equilibrium carriers have impaired experimental verification of ab initio quantum theories. Here, we present an approach to studying plasmonic hot-carrier dynamics that analyzes the temporal waveform of coherent terahertz bursts radiated by photo-ejected hot carriers from designer nano-antennas with a broken symmetry. For ballistic carriers ejected from gold antennas, we find an ~11-femtosecond timescale composed of the plasmon lifetime and ballistic transport time. Polarization- and phase-sensitive detection of terahertz fields further grant direct access to their ballistic transport trajectory. Our approach opens explorations of ultrafast carrier dynamics in optically excited nanostructures. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.1126/science.adj5612 |
| الاتاحة: | http://dx.doi.org/10.1126/science.adj5612 https://www.science.org/doi/pdf/10.1126/science.adj5612 |
| رقم الانضمام: | edsbas.5EE6E547 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1126/science.adj5612 |
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