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Rojas-Gatjens E, Akkerman QA, Manna L, Srimath Kandada AR, Silva-Acuña C. Exciton-photocarrier interference in mixed lead-halide-perovskite nanocrystals. J Chem Phys 2024; 160:221101. [PMID: 38856052 DOI: 10.1063/5.0203982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 05/24/2024] [Indexed: 06/11/2024] Open
Abstract
The use of semiconductor nanocrystals in scalable quantum technologies requires characterization of the exciton coherence dynamics in an ensemble of electronically isolated crystals in which system-bath interactions are nevertheless strong. In this communication, we identify signatures of Fano-like interference between excitons and photocarriers in the coherent two-dimensional photoluminescence excitation spectral lineshapes of mixed lead-halide perovskite nanocrystals in dilute solution. Specifically, by tuning the femtosecond-pulse spectrum, we show such interference in an intermediate coupling regime, which is evident in the coherent lineshape when simultaneously exciting the exciton and the free-carrier band at higher energy. We conclude that this interference is an intrinsic effect that will be consequential in the quantum dynamics of the system and will thus dictate decoherence dynamics, with consequences in their application in quantum technologies.
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Affiliation(s)
- Esteban Rojas-Gatjens
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, USA
- School of Physics, Georgia Institute of Technology, 837 State St. NW, Atlanta, Georgia 30332, USA
| | - Quinten A Akkerman
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Liberato Manna
- Nanochemistry Department, Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Ajay Ram Srimath Kandada
- Department of Physics and Center for Functional Materials, Wake Forest University, 2090 Eure Drive, Winston-Salem, North Carolina 27109, USA
| | - Carlos Silva-Acuña
- School of Chemistry and Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive, Atlanta, Georgia 30332, USA
- School of Physics, Georgia Institute of Technology, 837 State St. NW, Atlanta, Georgia 30332, USA
- Institut Courtois & Département de Physique, Université de Montréal, 1375 Avenue Thérèse-Lavoie-Roux, Montréal, Québec H2V 0B3, Canada
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Fu Y, Wang B, Wang K, Tang X, Li B, Yin Z, Han J, Lin CD, Jin C. Controlling laser-dressed resonance line shape using attosecond extreme-ultraviolet pulse with a spectral minimum. Proc Natl Acad Sci U S A 2024; 121:e2307836121. [PMID: 38170749 PMCID: PMC10786267 DOI: 10.1073/pnas.2307836121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 12/01/2023] [Indexed: 01/05/2024] Open
Abstract
High-harmonic generation from a gas target exhibits sharp spectral features and rapid phase variation near the Cooper minimum. By applying spectral filtering, shaped isolated attosecond pulses can be generated where the pulse is split into two in the time domain. Using such shaped extreme-ultraviolet (XUV) pulses, we theoretically study attosecond transient absorption (ATA) spectra of helium [Formula: see text] autoionizing state which is resonantly coupled to the [Formula: see text] dark state by a time-delayed infrared laser. Our simulations show that the asymmetric [Formula: see text] Fano line shape can be readily tuned into symmetric Lorentzian within the time delay of a few tens of attoseconds. Such efficient control is due to the destructive interference in the generation of the [Formula: see text] state when it is excited by a strongly shaped XUV pulse. This is to be compared to prior experiments where tuning the line shape of a Fano resonance would take tens of femtoseconds. We also show that the predicted ATA spectral line shape can be observed experimentally after propagation in a gas medium. Our results suggest that strongly shaped attosecond XUV pulses offer the opportunity for controlling and probing fine features of narrow resonances on the few-ten attoseconds timescale.
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Affiliation(s)
- Yong Fu
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Bincheng Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Kan Wang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Xiangyu Tang
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Baochang Li
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Zhiming Yin
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - Jiaxin Han
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
| | - C. D. Lin
- Department of Physics, James R. Macdonald Laboratory, Kansas State University, Manhattan, KS66506
| | - Cheng Jin
- Department of Applied Physics, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
- Ministry of Industry and Information Technology Key Laboratory of Semiconductor Microstructure and Quantum Sensing, Nanjing University of Science and Technology, Nanjing, Jiangsu210094, China
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Chuntonov L, Rubtsov IV. Surface-enhanced ultrafast two-dimensional vibrational spectroscopy with engineered plasmonic nano-antennas. J Chem Phys 2020; 153:050902. [DOI: 10.1063/5.0013956] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Lev Chuntonov
- Schulich Faculty of Chemistry and Solid State Institute, Technion – Israel Institute of Technology, Haifa 3200003, Israel
| | - Igor V. Rubtsov
- Department of Chemistry, Tulane University, New Orleans, Louisiana 70118, USA
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Tek G, Hamm P. A Correction Scheme for Fano Line Shapes in Two-Dimensional Infrared Spectroscopy. J Phys Chem Lett 2020; 11:6185-6190. [PMID: 32659094 DOI: 10.1021/acs.jpclett.0c01752] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The asymmetry of Fano line shapes observed for metal-adsorbate systems is reflected in two-dimensional infrared (2D IR) spectroscopy as a distorted spectrum. A phenomenological correction scheme is proposed that transforms distorted 2D IR spectra into conventional spectra. To that end, a phase correction factor is first derived from the IR absorption spectrum of the sample by symmetrizing the asymmetric line shape and subsequently applied to the distorted 2D IR spectra. The concept is illustrated for a model system consisting of an organic molecule (p-mercaptobenzonitrile) adsorbed on a sputter-coated metal layer (Au). The correction scheme reveals conventional, easily interpretable 2D IR spectra.
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Affiliation(s)
- Gökçen Tek
- Department of Chemistry, University of Zurich, CH-8057 Zurich, Switzerland
| | - Peter Hamm
- Department of Chemistry, University of Zurich, CH-8057 Zurich, Switzerland
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Cohn B, Engelman B, Goldner A, Chuntonov L. Two-Dimensional Infrared Spectroscopy with Local Plasmonic Fields of a Trimer Gap-Antenna Array. J Phys Chem Lett 2018; 9:4596-4601. [PMID: 30044640 DOI: 10.1021/acs.jpclett.8b01937] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Half-wavelength plasmonic antennas tuned to resonance with molecular vibrational excitations have been demonstrated to enhance 2DIR signals by multiple orders of magnitude. We design doubly degenerate in-plane plasmonic normal modes of the symmetric trimer gap-antenna, which have orthogonal dipole moments excited by light of the appropriate polarization, to localize the enhanced field into the antenna's gap. Vibrational excitations serve as sensitive probes of the plasmonic fields. 2DIR spectroscopy of thin molecular films indicates that molecules emitting enhanced signals experience an electric field with a direction independent of the excitation laser pulse polarization. Our results illustrate the trade-off between the large signal amplification in molecules close to the antenna surface by resonant plasmons, where the direction of the enhanced fields follows metal surface boundary conditions, and the associated limitations for the polarization-selective spectroscopy. The ultrafast quantum dynamics reported by the enhanced signals is not affected by its interaction with plasmonic excitation.
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