Strong-field Driven Sub-cycle Band Structure Modulation and Dephasing Control
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866917265608278016 |
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| author | Walz, Francis Kumar, Shashank Olounabadi, Amirali Sharifi Zhong, Yuyan Zimmerman, Russell Pandey, Siddhant Liu, Eric Tan, Liang Z. Shivaram, Niranjan |
| author_facet | Walz, Francis Kumar, Shashank Olounabadi, Amirali Sharifi Zhong, Yuyan Zimmerman, Russell Pandey, Siddhant Liu, Eric Tan, Liang Z. Shivaram, Niranjan |
| contents | Over the past decade, ultrafast electron dynamics in the solid state have been extensively studied using various strong light-matter interaction techniques, such as high-harmonic generation. These studies lead to multiple interpretations of light-matter interaction in the strong-field regime, with exact mechanisms not yet fully understood. It is well known that strong-field interaction with a crystalline solid leads to significant modification of its band structure and, hence, its optical properties on ultrafast timescales. In this work, we present measurements of ultrafast electric-field observables in magnesium oxide using a non-resonant nonlinear optical interaction. Using field observables, we show that strong laser fields modulate the band structure on sub-cycle timescales, thereby altering the material's nonlinear optical response. We perform time-dependent perturbation theory calculations using a field-dependent dispersion relation and non-perturbative semiconductor Bloch equation calculations, both of which agree with experimental observations. Furthermore, we directly extract dephasing times from the real-time signal electric field envelope and show sub-cycle control of dephasing times. Our work offers a new perspective on strong-field-driven electron dynamics in solids through electric-field observables. The demonstrated attosecond modulation of the nonlinear response could have important implications for quantum light generation and quantum spectroscopy using nonlinear optical processes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16651 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Strong-field Driven Sub-cycle Band Structure Modulation and Dephasing Control Walz, Francis Kumar, Shashank Olounabadi, Amirali Sharifi Zhong, Yuyan Zimmerman, Russell Pandey, Siddhant Liu, Eric Tan, Liang Z. Shivaram, Niranjan Optics Quantum Physics Over the past decade, ultrafast electron dynamics in the solid state have been extensively studied using various strong light-matter interaction techniques, such as high-harmonic generation. These studies lead to multiple interpretations of light-matter interaction in the strong-field regime, with exact mechanisms not yet fully understood. It is well known that strong-field interaction with a crystalline solid leads to significant modification of its band structure and, hence, its optical properties on ultrafast timescales. In this work, we present measurements of ultrafast electric-field observables in magnesium oxide using a non-resonant nonlinear optical interaction. Using field observables, we show that strong laser fields modulate the band structure on sub-cycle timescales, thereby altering the material's nonlinear optical response. We perform time-dependent perturbation theory calculations using a field-dependent dispersion relation and non-perturbative semiconductor Bloch equation calculations, both of which agree with experimental observations. Furthermore, we directly extract dephasing times from the real-time signal electric field envelope and show sub-cycle control of dephasing times. Our work offers a new perspective on strong-field-driven electron dynamics in solids through electric-field observables. The demonstrated attosecond modulation of the nonlinear response could have important implications for quantum light generation and quantum spectroscopy using nonlinear optical processes. |
| title | Strong-field Driven Sub-cycle Band Structure Modulation and Dephasing Control |
| topic | Optics Quantum Physics |
| url | https://arxiv.org/abs/2510.16651 |