Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity

Claudia Piccinini; Aleksander Rodek; Abdulmalik A. Madigawa; Ailton Garcia; Saimon F. Covre da Silva; Martin A. Jacobsen; Luca Vannucci; Gregor Weihs; Armando Rastelli; Vikas Remesh; Niels Gregersen; Battulga Munkhbat

doi:10.1103/q616-jr19

Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity

Claudia Piccinini
, Aleksander Rodek
, Abdulmalik A. Madigawa
, Ailton Garcia
, Saimon F. Covre da Silva
, Martin A. Jacobsen
, Luca Vannucci
, Gregor Weihs
, Armando Rastelli
, Vikas Remesh
, Niels Gregersen^*
, Battulga Munkhbat

^*Corresponding author for this work

Department of Semiconductor Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Coherent control of quantum emitters is essential for scalable quantum photonic technologies. The recently
proposed swing up of the quantum emitter population (SUPER) scheme allows efficient and coherent state
preparation via off-resonant, red-detuned laser pulses, simplifying laser suppression and enhancing photon
collection. We present a systematic study of SUPER excitation applied to a single GaAs quantum dot in a
low-Q micropillar cavity. We first identify the optimal excitation conditions for SUPER, and then compare
the key figures of merit against the well-established two-photon excitation (TPE). Despite requiring higher
excitation powers, SUPER achieves near-unity population inversion of the exciton state (∼95%) and high
single-photon purity (g(2) = 0.03) comparable to that under TPE, while also exhibiting a shortened decay time
(∼200 ps) reducing the time jitter in the exciton population. A polarization-resolved analysis reveals that when
both excitation and collection are aligned with one of the exciton dipoles, SUPER results in highly polarized
single-photon emission, exceeding the resonant TPE saturation by a factor of 1.45. Under optimized excitation
conditions, we also observe biexciton preparation via a distinct SUPER resonance, constituting an experimental
demonstration of biexciton preparation using SUPER. These findings are in good agreement with a proposed
four-level theoretical model that incorporates the biexciton state. Furthermore, we report that, strikingly, a
slight misalignment of laser polarization induces an additional SUPER resonance that selectively populates the
orthogonal exciton dipole, without altering the nominal excitation polarization. This unexpected behavior reveals
a new degree of freedom for coherent state preparation. Our findings establish the SUPER scheme as a versatile
tool for state-selective exciton and biexciton control, with strong potential for quantum photonic applications.

Original language	English
Article number	105306
Pages (from-to)	1-12
Number of pages	12
Journal	Physical Review B
Volume	114
Issue number	10
DOIs	https://doi.org/10.1103/q616-jr19
Publication status	Published - 24 Aug 2026

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Piccinini, C., Rodek, A., Madigawa, A. A., Garcia, A., da Silva, S. F. C., Jacobsen, M. A., Vannucci, L., Weihs, G., Rastelli, A., Remesh, V., Gregersen, N., & Munkhbat, B. (2026). Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity. Physical Review B, 114(10), 1-12. Article 105306. https://doi.org/10.1103/q616-jr19

@article{259e0810dc02468e95546937d9fee240,

title = "Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity",

abstract = "Coherent control of quantum emitters is essential for scalable quantum photonic technologies. The recently proposed swing up of the quantum emitter population (SUPER) scheme allows efficient and coherent state preparation via off-resonant, red-detuned laser pulses, simplifying laser suppression and enhancing photon collection. We present a systematic study of SUPER excitation applied to a single GaAs quantum dot in a low-Q micropillar cavity. We first identify the optimal excitation conditions for SUPER, and then compare the key figures of merit against the well-established two-photon excitation (TPE). Despite requiring higher excitation powers, SUPER achieves near-unity population inversion of the exciton state (∼95\%) and high single-photon purity (g(2) = 0.03) comparable to that under TPE, while also exhibiting a shortened decay time (∼200 ps) reducing the time jitter in the exciton population. A polarization-resolved analysis reveals that when both excitation and collection are aligned with one of the exciton dipoles, SUPER results in highly polarized single-photon emission, exceeding the resonant TPE saturation by a factor of 1.45. Under optimized excitation conditions, we also observe biexciton preparation via a distinct SUPER resonance, constituting an experimental demonstration of biexciton preparation using SUPER. These findings are in good agreement with a proposed four-level theoretical model that incorporates the biexciton state. Furthermore, we report that, strikingly, a slight misalignment of laser polarization induces an additional SUPER resonance that selectively populates the orthogonal exciton dipole, without altering the nominal excitation polarization. This unexpected behavior reveals a new degree of freedom for coherent state preparation. Our findings establish the SUPER scheme as a versatile tool for state-selective exciton and biexciton control, with strong potential for quantum photonic applications.",

author = "Claudia Piccinini and Aleksander Rodek and Madigawa, \{Abdulmalik A.\} and Ailton Garcia and \{da Silva\}, \{Saimon F. Covre\} and Jacobsen, \{Martin A.\} and Luca Vannucci and Gregor Weihs and Armando Rastelli and Vikas Remesh and Niels Gregersen and Battulga Munkhbat",

year = "2026",

month = aug,

day = "24",

doi = "10.1103/q616-jr19",

language = "English",

volume = "114",

pages = "1--12",

journal = "Physical Review B",

issn = "0163-1829",

publisher = "The American Physical Society",

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Piccinini, C, Rodek, A, Madigawa, AA, Garcia, A, da Silva, SFC, Jacobsen, MA, Vannucci, L, Weihs, G, Rastelli, A, Remesh, V, Gregersen, N & Munkhbat, B 2026, 'Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity', Physical Review B, vol. 114, no. 10, 105306, pp. 1-12. https://doi.org/10.1103/q616-jr19

TY - JOUR

T1 - Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity

AU - Piccinini, Claudia

AU - Rodek, Aleksander

AU - Madigawa, Abdulmalik A.

AU - Garcia, Ailton

AU - da Silva, Saimon F. Covre

AU - Jacobsen, Martin A.

AU - Vannucci, Luca

AU - Weihs, Gregor

AU - Rastelli, Armando

AU - Remesh, Vikas

AU - Gregersen, Niels

AU - Munkhbat, Battulga

PY - 2026/8/24

Y1 - 2026/8/24

N2 - Coherent control of quantum emitters is essential for scalable quantum photonic technologies. The recently proposed swing up of the quantum emitter population (SUPER) scheme allows efficient and coherent state preparation via off-resonant, red-detuned laser pulses, simplifying laser suppression and enhancing photon collection. We present a systematic study of SUPER excitation applied to a single GaAs quantum dot in a low-Q micropillar cavity. We first identify the optimal excitation conditions for SUPER, and then compare the key figures of merit against the well-established two-photon excitation (TPE). Despite requiring higher excitation powers, SUPER achieves near-unity population inversion of the exciton state (∼95%) and high single-photon purity (g(2) = 0.03) comparable to that under TPE, while also exhibiting a shortened decay time (∼200 ps) reducing the time jitter in the exciton population. A polarization-resolved analysis reveals that when both excitation and collection are aligned with one of the exciton dipoles, SUPER results in highly polarized single-photon emission, exceeding the resonant TPE saturation by a factor of 1.45. Under optimized excitation conditions, we also observe biexciton preparation via a distinct SUPER resonance, constituting an experimental demonstration of biexciton preparation using SUPER. These findings are in good agreement with a proposed four-level theoretical model that incorporates the biexciton state. Furthermore, we report that, strikingly, a slight misalignment of laser polarization induces an additional SUPER resonance that selectively populates the orthogonal exciton dipole, without altering the nominal excitation polarization. This unexpected behavior reveals a new degree of freedom for coherent state preparation. Our findings establish the SUPER scheme as a versatile tool for state-selective exciton and biexciton control, with strong potential for quantum photonic applications.

AB - Coherent control of quantum emitters is essential for scalable quantum photonic technologies. The recently proposed swing up of the quantum emitter population (SUPER) scheme allows efficient and coherent state preparation via off-resonant, red-detuned laser pulses, simplifying laser suppression and enhancing photon collection. We present a systematic study of SUPER excitation applied to a single GaAs quantum dot in a low-Q micropillar cavity. We first identify the optimal excitation conditions for SUPER, and then compare the key figures of merit against the well-established two-photon excitation (TPE). Despite requiring higher excitation powers, SUPER achieves near-unity population inversion of the exciton state (∼95%) and high single-photon purity (g(2) = 0.03) comparable to that under TPE, while also exhibiting a shortened decay time (∼200 ps) reducing the time jitter in the exciton population. A polarization-resolved analysis reveals that when both excitation and collection are aligned with one of the exciton dipoles, SUPER results in highly polarized single-photon emission, exceeding the resonant TPE saturation by a factor of 1.45. Under optimized excitation conditions, we also observe biexciton preparation via a distinct SUPER resonance, constituting an experimental demonstration of biexciton preparation using SUPER. These findings are in good agreement with a proposed four-level theoretical model that incorporates the biexciton state. Furthermore, we report that, strikingly, a slight misalignment of laser polarization induces an additional SUPER resonance that selectively populates the orthogonal exciton dipole, without altering the nominal excitation polarization. This unexpected behavior reveals a new degree of freedom for coherent state preparation. Our findings establish the SUPER scheme as a versatile tool for state-selective exciton and biexciton control, with strong potential for quantum photonic applications.

UR - https://www.scopus.com/pages/publications/105051150124

U2 - 10.1103/q616-jr19

DO - 10.1103/q616-jr19

M3 - Article

SN - 0163-1829

VL - 114

SP - 1

EP - 12

JO - Physical Review B

JF - Physical Review B

IS - 10

M1 - 105306

ER -

Exciton and biexciton preparation via coherent swing-up excitation in a GaAs quantum dot embedded in a micropillar cavity

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