Dynamically Dressed States of a Quantum Four-Level System
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arXiv
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| Autori principali: | , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909970389270528 |
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| author | Calcagno, Carolin Sbresny, Friedrich Bracht, Thomas K. Kim, Sang Kyu Casalengua, Eduardo Zubizarreta Boos, Katarina Rauhaus, William Riedl, Hubert Finley, Jonathan J. Reiter, Doris E. Müller, Kai |
| author_facet | Calcagno, Carolin Sbresny, Friedrich Bracht, Thomas K. Kim, Sang Kyu Casalengua, Eduardo Zubizarreta Boos, Katarina Rauhaus, William Riedl, Hubert Finley, Jonathan J. Reiter, Doris E. Müller, Kai |
| contents | In this work, we experimentally and theoretically study the dressed-state emission of the biexciton-exciton cascade in a semiconductor quantum dot under pulsed, resonant, two-photon excitation. Building on the well-characterized steady-state dressed emission of the four-level system, we examine its dynamic counterpart under pulsed, resonant excitation, addressing both experimental observations and theoretical modeling. Here we report several sidebands emerging from the biexciton-to-exciton transition, whose number and spectral width depend on the excitation pulse duration and the effective pulse area, while no sidebands emerge from the exciton-to-ground-state transition. Since the biexciton state population follows a nonlinear pulse area function, sidebands with a small spectral nonlinearity result. Detuning- and time-dependent measurements provide deeper insight into the emission properties of the dressed states. They show that side peak emission only occurs in the presence of the excitation pulse. Moreover, when the system is excited by a Gaussian-shaped laser pulse, side peak emission takes place sequentially. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_14643 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Dynamically Dressed States of a Quantum Four-Level System Calcagno, Carolin Sbresny, Friedrich Bracht, Thomas K. Kim, Sang Kyu Casalengua, Eduardo Zubizarreta Boos, Katarina Rauhaus, William Riedl, Hubert Finley, Jonathan J. Reiter, Doris E. Müller, Kai Quantum Physics Mesoscale and Nanoscale Physics In this work, we experimentally and theoretically study the dressed-state emission of the biexciton-exciton cascade in a semiconductor quantum dot under pulsed, resonant, two-photon excitation. Building on the well-characterized steady-state dressed emission of the four-level system, we examine its dynamic counterpart under pulsed, resonant excitation, addressing both experimental observations and theoretical modeling. Here we report several sidebands emerging from the biexciton-to-exciton transition, whose number and spectral width depend on the excitation pulse duration and the effective pulse area, while no sidebands emerge from the exciton-to-ground-state transition. Since the biexciton state population follows a nonlinear pulse area function, sidebands with a small spectral nonlinearity result. Detuning- and time-dependent measurements provide deeper insight into the emission properties of the dressed states. They show that side peak emission only occurs in the presence of the excitation pulse. Moreover, when the system is excited by a Gaussian-shaped laser pulse, side peak emission takes place sequentially. |
| title | Dynamically Dressed States of a Quantum Four-Level System |
| topic | Quantum Physics Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2506.14643 |