Ultrafast valleytronic logic operations
Fuente:
arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866915058797248512 |
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| author | Gucci, Francesco Molinero, Eduardo B. Russo, Mattia San-Jose, Pablo Camargo, Franco V. A. Maiuri, Margherita Ivanov, Misha Jiménez-Galán, Álvaro Silva, Rui E. F. Conte, Stefano Dal Cerullo, Giulio |
| author_facet | Gucci, Francesco Molinero, Eduardo B. Russo, Mattia San-Jose, Pablo Camargo, Franco V. A. Maiuri, Margherita Ivanov, Misha Jiménez-Galán, Álvaro Silva, Rui E. F. Conte, Stefano Dal Cerullo, Giulio |
| contents | Information processing currently reaches speeds as high as 800 GHz. However, the underlying transistor technology is quickly approaching its fundamental limits and further progress requires a disruptive approach. One such path is to manipulate quantum properties of solids, such as the valley degree of freedom, with ultrashort controlled lightwaves. Here we employ a sequence of few-optical-cycle visible pulses controlled with attosecond precision to excite and switch the valley pseudospin in a 2D semiconductor. We show that a pair of pulses separated in time with linear orthogonal polarizations can induce a valley-selective population. Additionally, exploiting a four-pump excitation protocol, we perform logic operations such as valley de-excitation and re-excitation at room temperature at rates as high as ~10 THz. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2412_08318 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Ultrafast valleytronic logic operations Gucci, Francesco Molinero, Eduardo B. Russo, Mattia San-Jose, Pablo Camargo, Franco V. A. Maiuri, Margherita Ivanov, Misha Jiménez-Galán, Álvaro Silva, Rui E. F. Conte, Stefano Dal Cerullo, Giulio Mesoscale and Nanoscale Physics Information processing currently reaches speeds as high as 800 GHz. However, the underlying transistor technology is quickly approaching its fundamental limits and further progress requires a disruptive approach. One such path is to manipulate quantum properties of solids, such as the valley degree of freedom, with ultrashort controlled lightwaves. Here we employ a sequence of few-optical-cycle visible pulses controlled with attosecond precision to excite and switch the valley pseudospin in a 2D semiconductor. We show that a pair of pulses separated in time with linear orthogonal polarizations can induce a valley-selective population. Additionally, exploiting a four-pump excitation protocol, we perform logic operations such as valley de-excitation and re-excitation at room temperature at rates as high as ~10 THz. |
| title | Ultrafast valleytronic logic operations |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2412.08318 |