Research paperExperimental GrowthExperimental CharacterizationTheoreticalExcited-State Trions in a Quantum WellSourabh Jain, Mikhail Glazov, Ashish Arora2025·10.1103/8181-jzj5·arXiv:2505.06988AbstractWe report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al0.3Ga0.7As quantum well using magneto-optical Kerr effect spectroscopy under out-of-plane magnetic fields up to 6 T. This resonance appears slightly below the 2s exciton in energy. Strikingly, the 2s trion is found to be bound only for magnetic fields larger than 1 T. The signature of the 2s trion is absent in the magneto-reflectance spectra, while it is detectable in the MOKE spectra signifying the importance of the powerful technique. Similar to the 1s states, the 2s trion shows an opposite degree of magnetic-field-induced polarization compared to its exciton counterpart, in agreement with our theoretical calculations. This transfer of oscillator strength between the complexes establishes an optical fingerprint of the 2s excited trion.Read more
A 4.2 nm wide doped GaAs single quantum well with Al0.3Ga0.7As barriers grown on a GaAs (001) substrate.1 preparation2 characterizations8 properties3 figuresExperimentalGaAsStudied MaterialAl0.3Ga0.7AsSubstrate / DielectricGaAsSubstrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationTheoreticalExcited-State Trions in a Quantum WellSourabh Jain, Mikhail Glazov, Ashish Arora2025·10.1103/8181-jzj5·arXiv:2505.06988AbstractWe report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al0.3Ga0.7As quantum well using magneto-optical Kerr effect spectroscopy under out-of-plane magnetic fields up to 6 T. This resonance appears slightly below the 2s exciton in energy. Strikingly, the 2s trion is found to be bound only for magnetic fields larger than 1 T. The signature of the 2s trion is absent in the magneto-reflectance spectra, while it is detectable in the MOKE spectra signifying the importance of the powerful technique. Similar to the 1s states, the 2s trion shows an opposite degree of magnetic-field-induced polarization compared to its exciton counterpart, in agreement with our theoretical calculations. This transfer of oscillator strength between the complexes establishes an optical fingerprint of the 2s excited trion.Read more
A 4.2 nm wide doped GaAs single quantum well with Al0.3Ga0.7As barriers grown on a GaAs (001) substrate.1 preparation2 characterizations8 properties3 figuresExperimentalGaAsStudied MaterialAl0.3Ga0.7AsSubstrate / DielectricGaAsSubstrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationTheoreticalExcited-State Trions in a Quantum WellSourabh Jain, Mikhail Glazov, Ashish Arora2025·10.1103/8181-jzj5·arXiv:2505.06988AbstractWe report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al0.3Ga0.7As quantum well using magneto-optical Kerr effect spectroscopy under out-of-plane magnetic fields up to 6 T. This resonance appears slightly below the 2s exciton in energy. Strikingly, the 2s trion is found to be bound only for magnetic fields larger than 1 T. The signature of the 2s trion is absent in the magneto-reflectance spectra, while it is detectable in the MOKE spectra signifying the importance of the powerful technique. Similar to the 1s states, the 2s trion shows an opposite degree of magnetic-field-induced polarization compared to its exciton counterpart, in agreement with our theoretical calculations. This transfer of oscillator strength between the complexes establishes an optical fingerprint of the 2s excited trion.Read more
A 4.2 nm wide doped GaAs single quantum well with Al0.3Ga0.7As barriers grown on a GaAs (001) substrate.1 preparation2 characterizations8 properties3 figuresExperimentalGaAsStudied MaterialAl0.3Ga0.7AsSubstrate / DielectricGaAsSubstrate / DielectricExpand
Research paperExperimental GrowthExperimental CharacterizationTheoreticalExcited-State Trions in a Quantum WellSourabh Jain, Mikhail Glazov, Ashish Arora2025·10.1103/8181-jzj5·arXiv:2505.06988AbstractWe report on the observation of an excited 2s state of a trion in a 4.2 nm wide doped GaAs/Al0.3Ga0.7As quantum well using magneto-optical Kerr effect spectroscopy under out-of-plane magnetic fields up to 6 T. This resonance appears slightly below the 2s exciton in energy. Strikingly, the 2s trion is found to be bound only for magnetic fields larger than 1 T. The signature of the 2s trion is absent in the magneto-reflectance spectra, while it is detectable in the MOKE spectra signifying the importance of the powerful technique. Similar to the 1s states, the 2s trion shows an opposite degree of magnetic-field-induced polarization compared to its exciton counterpart, in agreement with our theoretical calculations. This transfer of oscillator strength between the complexes establishes an optical fingerprint of the 2s excited trion.Read more
A 4.2 nm wide doped GaAs single quantum well with Al0.3Ga0.7As barriers grown on a GaAs (001) substrate.1 preparation2 characterizations8 properties3 figuresExperimentalGaAsStudied MaterialAl0.3Ga0.7AsSubstrate / DielectricGaAsSubstrate / DielectricExpand
