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HL: Fachverband Halbleiterphysik
HL 57: Quantum Dots and Wires: Optics II
HL 57.3: Vortrag
Freitag, 21. März 2025, 10:00–10:15, H13
Spectral correlations of dynamical resonance fluorescence — •Santiago Bermúdez Feijóo1, Eduardo Zubizarreta Casalengua2, Kai Müller2, and Klaus D. Jöns1 — 1PhoQS Institute, CeOPP, and Department of Physics, Paderborn University, Paderborn, Germany — 2Walter Schottky Institute, School of Computation, Information and Technology and MCQST, Technische Universität München, Garching, Germany
In this work, we explore the time-dependent, frequency-filtered [1] photon statistics of a two-level system under pulsed excitation, whose dynamical emission spectrum [2] has been recently experimentally measured using semiconductor QDs [3]. Our results show that photon statistics are not fixed [4] but vary between bunching and antibunching, depending on the applied frequency filters. This reveals an intricate interplay between pulse area, photon frequencies, and correlations, extending insights from the CW case [5]. Notably, frequency-filtering enhances time-bin applications: for odd pulses, it suppresses two-photon events by up to two orders of magnitude, while for even pulses, it restores single-photon purity. This approach simplifies entanglement generation by enabling photon-number control [6] via frequency selection, eliminating the need for complex excitation schemes. [1] E. del Valle et al. PRL 109(18):183601 (2012). [2] Moelbjerg, A. et al. PRL.108, 017401 (2012). [3] Boos, K. et al. PRL.132, 053602 (2024). [4] Fischer, K. et al. Nature Phys 13, 649*654 (2017). [5] J.C. Lopez Carreno et al. Laser & Photonics Reviews, 11(5):1700090 (2019). [6] Wein, S.C et al. Nat. Photon. 16, 374*379 (2022).
Keywords: dynamical resonance fluorescence; frequency filtered correlations; time-bin entanglement