Phonon Wave Packet Emission during State Preparation of a Semiconductor Quantum Dot using Different Schemes

K., Bracht, Thomas; Seidelmann, Tim; Kuhn, Tilmann; Axt, Vollrath M.; Reiter, Doris E.

doi:10.1002/pssb.202100649

Cited by 7 publications

(6 citation statements)

References 77 publications

(138 reference statements)

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“…To calculate the exciton occupation, we derive the equations of motion from the Hamiltonian using the von-Neumann equation, which is then numerically integrated . Because the phonon influence on the SUPER scheme has been shown to be weak, we neglect phonons in the present calculations. In Figure b, we show an exemplary time dynamics at Δ 1 = –4.9 meV, Δ 2 = −11.12 meV and I 1 = 0.5, I 2 = 0.96.…”

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confidence: 99%

SUPER Scheme in Action: Experimental Demonstration of Red-Detuned Excitation of a Quantum Emitter

et al. 2022

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The quest for the perfect single-photon source includes finding the optimal protocol for exciting the quantum emitter. Coherent optical excitation was, up until now, achieved by tuning the laser pulses to the transition frequency of the emitter, either directly or in average. Recently, it was theoretically discovered that an excitation with two red-detuned pulses is also possible where neither of which would yield a significant upperlevel population individually. We show that the so-called swing-up of quantum emitter population (SUPER) scheme can be implemented experimentally with similar properties to existing schemes by precise amplitude shaping of a broadband pulse. Because of its truly off-resonant nature, this scheme has the prospect of powering high-purity photon sources with superior photon count rate.

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confidence: 99%

SUPER Scheme in Action: Experimental Demonstration of Red-Detuned Excitation of a Quantum Emitter

et al. 2022

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“…[69]. Phonons are known to result in decoherence effects for state preparation schemes in quantum dots [76], which here have been shown to have rather negligible effects [71]. For clarity, we therefore neglect dissipation in this paper.…”

Section: B Idea Of Supermentioning

confidence: 91%

“…A radically different approach is the Swing-UP of quantum EmitteR population (SUPER) scheme [69][70][71][72] that exploits the coherence of the quantum system by using off-resonant pulse pairs. The SUPER scheme also circumvents the necessity for polarization filtering, without relying on incoherent or emitter-specific processes like phonon effects in a quantum dot, because the exciting laser frequency is energetically separated from the signal by several millielectronvolts.…”

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confidence: 99%

Dressed-state analysis of two-color excitation schemes

K.¹,

Seidelmann²,

Karli³

et al. 2022

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To coherently control a few-level quantum emitter, typically pulses with an energy resonant to the transition energy are applied making use of the Rabi mechanism, while a single off-resonant pulse does not result in a population inversion. Surprisingly, a two-color excitation with a combination of two off-resonant pulses making use of the Swing-UP of quantum EmitteR population (SUPER) mechanism is able to invert the system. In this paper, we provide an in-depth analysis of the SUPER scheme within the dressed-state picture. We show that the SUPER mechanism can be understood as a driving of the transition between the dressed states. In the two-level system this allows us to derive analytic expressions for the pulse parameters yielding a population inversion. We extend our considerations to the three-level system, where a strong mixing between the bare states takes place. The insights gained from these results help in finding accessible regimes for further experimental realizations of the SUPER scheme and similar two-color excitation schemes.

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“…Figure 2). Since the phonon influence on the SUPER scheme has been shown to be rather negligible [43,55], we ignored it in our model. Since the excitation takes place with linear polarized pulses, we have additionally performed calculations within the standard three-level system including an additional biexciton state [33], with a biexciton binding energy of E B = 4 meV.…”

Section: B Theoretical Model and Calculationsmentioning

confidence: 99%

SUPER Scheme in Action: Experimental Demonstration of Red-detuned Excitation of a Quantum Dot

Karli,

Kappe,

Remesh

et al. 2022

Preprint

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The quest for the perfect single-photon source includes finding the optimal protocol for exciting the quantum emitter. Based on a recently proposed, so-called SUPER (swing-up of quantum emitter population) scheme, we demonstrate experimentally that two red-detuned laser pulses, neither of which could yield a significant upper-level population individually, lead to the coherent excitation of a semiconductor quantum dot. We characterize the emitted single photons and show that they have properties comparable to those achieved under resonant excitation schemes.

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Phonon Wave Packet Emission during State Preparation of a Semiconductor Quantum Dot using Different Schemes

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/pssb.202100649.

Cited by 7 publications

References 77 publications

SUPER Scheme in Action: Experimental Demonstration of Red-Detuned Excitation of a Quantum Emitter

SUPER Scheme in Action: Experimental Demonstration of Red-Detuned Excitation of a Quantum Emitter

Dressed-state analysis of two-color excitation schemes

SUPER Scheme in Action: Experimental Demonstration of Red-detuned Excitation of a Quantum Dot

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