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Fieramosca A, Mastria R, Dini K, Dominici L, Polimeno L, Pugliese M, Prontera CT, De Marco L, Maiorano V, Todisco F, Ballarini D, De Giorgi M, Gigli G, Liew TCH, Sanvitto D. Origin of Exciton-Polariton Interactions and Decoupled Dark States Dynamics in 2D Hybrid Perovskite Quantum Wells. NANO LETTERS 2024; 24:8240-8247. [PMID: 38925628 PMCID: PMC11247545 DOI: 10.1021/acs.nanolett.4c00418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
The realization of efficient optical devices depends on the ability to harness strong nonlinearities, which are challenging to achieve with standard photonic systems. Exciton-polaritons formed in hybrid organic-inorganic perovskites offer a promising alternative, exhibiting strong interactions at room temperature (RT). Despite recent demonstrations showcasing a robust nonlinear response, further progress is hindered by an incomplete understanding of the microscopic mechanisms governing polariton interactions in perovskite-based strongly coupled systems. Here, we investigate the nonlinear properties of quasi-2D dodecylammonium lead iodide perovskite (n3-C12) crystals embedded in a planar microcavity. Polarization-resolved pump-probe measurements reveal the contribution of indirect exchange interactions assisted by dark states formation. Additionally, we identify a strong dependence of the unique spin-dependent interaction of polaritons on sample detuning. The results are pivotal for the advancement of polaritonics, and the tunability of the robust spin-dependent anisotropic interaction in n3-C12 perovskites makes this material a powerful choice for the realization of polaritonic circuits.
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Affiliation(s)
- Antonio Fieramosca
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Rosanna Mastria
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Kevin Dini
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Lorenzo Dominici
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Laura Polimeno
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Marco Pugliese
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | | | - Luisa De Marco
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Vincenzo Maiorano
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Francesco Todisco
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Dario Ballarini
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Milena De Giorgi
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
| | - Giuseppe Gigli
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
- Department of Mathematics and Physics Ennio De Giorgi, University of Salento, Via Arnesano, Lecce 73100, Italy
| | - Timothy C H Liew
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Daniele Sanvitto
- CNR NANOTEC Institute of Nanotechnology, Via Monteroni, Lecce 73100, Italy
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2
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Polimeno L, Coriolano A, Mastria R, Todisco F, De Giorgi M, Fieramosca A, Pugliese M, Prontera CT, Rizzo A, De Marco L, Ballarini D, Gigli G, Sanvitto D. Room Temperature Polariton Condensation from Whispering Gallery Modes in CsPbBr 3 Microplatelets. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024; 36:e2312131. [PMID: 38632702 DOI: 10.1002/adma.202312131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 03/28/2024] [Indexed: 04/19/2024]
Abstract
Room temperature (RT) polariton condensate holds exceptional promise for revolutionizing various fields of science and technology, encompassing optoelectronics devices to quantum information processing. Using perovskite materials, like all-inorganic cesium lead bromide (CsPbBr3) single crystal, provides additional advantages, such as ease of synthesis, cost-effectiveness, and compatibility with existing semiconductor technologies. In this work, the formation of whispering gallery modes (WGM) in CsPbBr3 single crystals with controlled geometry is shown, synthesized using a low-cost and efficient capillary bridge method. Through the implementation of microplatelets geometry, enhanced optical properties and performance are achieved due to the presence of sharp edges and a uniform surface, effectively avoiding non-radiative scattering losses caused by defects. This allows not only to observe strong light matter coupling and formation of whispering gallery polaritons, but also to demonstrate the onset of polariton condensation at RT. This investigation not only contributes to the advancement of the knowledge concerning the exceptional optical properties of perovskite-based polariton systems, but also unveils prospects for the exploration of WGM polariton condensation within the framework of a 3D perovskite-based platform, working at RT. The unique characteristics of polariton condensate, including low excitation thresholds and ultrafast dynamics, open up unique opportunities for advancements in photonics and optoelectronics devices.
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Affiliation(s)
- Laura Polimeno
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Annalisa Coriolano
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Rosanna Mastria
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Francesco Todisco
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Milena De Giorgi
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Antonio Fieramosca
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Marco Pugliese
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Carmela T Prontera
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Aurora Rizzo
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Luisa De Marco
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Dario Ballarini
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
| | - Giuseppe Gigli
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
- Dipartimento di Matematica e Fisica "Ennio de Giorgi", Universitá del Salento, Lecce, 73100, Italy
| | - Daniele Sanvitto
- CNR Nanotec, Institute of Nanotechnology, via Monteroni, Lecce, 73100, Italy
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Betzold S, Düreth J, Dusel M, Emmerling M, Bieganowska A, Ohmer J, Fischer U, Höfling S, Klembt S. Dirac Cones and Room Temperature Polariton Lasing Evidenced in an Organic Honeycomb Lattice. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2400672. [PMID: 38605674 DOI: 10.1002/advs.202400672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 03/24/2024] [Indexed: 04/13/2024]
Abstract
Artificial 1D and 2D lattices have emerged as a powerful platform for the emulation of lattice Hamiltonians, the fundamental study of collective many-body effects, and phenomena arising from non-trivial topology. Exciton-polaritons, bosonic part-light and part-matter quasiparticles, combine pronounced nonlinearities with the possibility of on-chip implementation. In this context, organic semiconductors embedded in microcavities have proven to be versatile candidates to study nonlinear many-body physics and bosonic condensation, and in contrast to most inorganic systems, they allow the use at ambient conditions since they host ultra-stable Frenkel excitons. A well-controlled, high-quality optical lattice is implemented that accommodates light-matter quasiparticles. The realized polariton graphene presents with excellent cavity quality factors, showing distinct signatures of Dirac cone and flatband dispersions as well as polariton lasing at room temperature. This is realized by filling coupled dielectric microcavities with the fluorescent protein mCherry. The emergence of a coherent polariton condensate at ambient conditions are demonstrated, taking advantage of coupling conditions as precise and controllable as in state-of-the-art inorganic semiconductor-based systems, without the limitations of e.g. lattice matching in epitaxial growth. This progress allows straightforward extension to more complex systems, such as the study of topological phenomena in 2D lattices including topological lasers and non-Hermitian optics.
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Affiliation(s)
- Simon Betzold
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Johannes Düreth
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Marco Dusel
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Monika Emmerling
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Antonina Bieganowska
- Department of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wyb. Wyspiańskiego 27, Wroclaw, 50-370, Poland
| | - Jürgen Ohmer
- Department of Biochemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Utz Fischer
- Department of Biochemistry, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Sven Höfling
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Sebastian Klembt
- Lehrstuhl für Technische Physik, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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4
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Peng K, Li W, Sun M, Rivero JDH, Ti C, Han X, Ge L, Yang L, Zhang X, Bao W. Topological valley Hall polariton condensation. NATURE NANOTECHNOLOGY 2024:10.1038/s41565-024-01674-6. [PMID: 38789618 DOI: 10.1038/s41565-024-01674-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 04/10/2024] [Indexed: 05/26/2024]
Abstract
A photonic topological insulator features robust directional propagation and immunity to defect perturbations of the edge/surface state. Exciton-polaritons, that is, the hybrid quasiparticles of excitons and photons in semiconductor microcavities, have been proposed as a tunable nonlinear platform for emulating topological phenomena. However, mainly due to excitonic material limitations, experimental observations so far have not been able to enter the nonlinear condensation regime or only show localized condensation in one dimension. Here we show a topological propagating edge state with polariton condensation at room temperature and without any external magnetic field. We overcome material limitations by using excitonic CsPbCl3 halide perovskites with a valley Hall lattice design. The polariton lattice features a large bandgap of 18.8 meV and exhibits strong nonlinear polariton condensation with clear long-range spatial coherence across the critical pumping density. The geometric parameters and material composition of our nonlinear many-body photonic system platform can in principle be tailored to study topological phenomena of other interquasiparticle interactions.
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Affiliation(s)
- Kai Peng
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
- Nanoscale Science and Engineering Center, University of California, Berkeley, Berkeley, CA, USA
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Wei Li
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Meng Sun
- School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing, China
| | - Jose D H Rivero
- Department of Physics and Astronomy, College of Staten Island, CUNY, New York, NY, USA
- The Graduate Center, CUNY, New York, NY, USA
| | - Chaoyang Ti
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Xu Han
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, USA
| | - Li Ge
- Department of Physics and Astronomy, College of Staten Island, CUNY, New York, NY, USA
- The Graduate Center, CUNY, New York, NY, USA
| | - Lan Yang
- Department of Electrical and Systems Engineering, Washington University, St Louis, MO, USA
| | - Xiang Zhang
- Nanoscale Science and Engineering Center, University of California, Berkeley, Berkeley, CA, USA.
| | - Wei Bao
- Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA.
- Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA.
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5
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Yang Y, Yang B, Ma G, Li J, Zhang S, Chan CT. Non-Abelian physics in light and sound. Science 2024; 383:eadf9621. [PMID: 38386745 DOI: 10.1126/science.adf9621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 01/17/2024] [Indexed: 02/24/2024]
Abstract
Non-Abelian phenomena arise when the sequence of operations on physical systems influences their behaviors. By possessing internal degrees of freedom such as polarization, light and sound can be subjected to various manipulations, including constituent materials, structured environments, and tailored source conditions. These manipulations enable the creation of a great variety of Hamiltonians, through which rich non-Abelian phenomena can be explored and observed. Recent developments have constituted a versatile testbed for exploring non-Abelian physics at the intersection of atomic, molecular, and optical physics; condensed matter physics; and mathematical physics. These fundamental endeavors could enable photonic and acoustic devices with multiplexing functionalities. Our review aims to provide a timely and comprehensive account of this emerging topic. Starting from the foundation of matrix-valued geometric phases, we address non-Abelian topological charges, non-Abelian gauge fields, non-Abelian braiding, non-Hermitian non-Abelian phenomena, and their realizations with photonics and acoustics and conclude with future prospects.
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Affiliation(s)
- Yi Yang
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
- HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Biao Yang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
- Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices, National University of Defense Technology, Changsha, China
- Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China
| | - Guancong Ma
- Department of Physics, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China
| | - Jensen Li
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
| | - Shuang Zhang
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong, China
- HK Institute of Quantum Science and Technology, The University of Hong Kong, Pokfulam, Hong Kong, China
- Department of Electrical and Electronic Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China
- New Cornerstone Science Laboratory, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - C T Chan
- Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China
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6
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Kang H, Ma J, Li J, Zhang X, Liu X. Exciton Polaritons in Emergent Two-Dimensional Semiconductors. ACS NANO 2023; 17:24449-24467. [PMID: 38051774 DOI: 10.1021/acsnano.3c07993] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
The "marriage" of light (i.e., photon) and matter (i.e., exciton) in semiconductors leads to the formation of hybrid quasiparticles called exciton polaritons with fascinating quantum phenomena such as Bose-Einstein condensation (BEC) and photon blockade. The research of exciton polaritons has been evolving into an era with emergent two-dimensional (2D) semiconductors and photonic structures for their tremendous potential to break the current limitations of quantum fundamental study and photonic applications. In this Perspective, the basic concepts of 2D excitons, optical resonators, and the strong coupling regime are introduced. The research progress of exciton polaritons is reviewed, and important discoveries (especially the recent ones of 2D exciton polaritons) are highlighted. Subsequently, the emergent 2D exciton polaritons are discussed in detail, ranging from the realization of the strong coupling regime in various photonic systems to the discoveries of attractive phenomena with interesting physics and extensive applications. Moreover, emerging 2D semiconductors, such as 2D perovskites (2DPK) and 2D antiferromagnetic (AFM) semiconductors, are surveyed for the manipulation of exciton polaritons with distinct control degrees of freedom (DOFs). Finally, the outlook on the 2D exciton polaritons and their nonlinear interactions is presented with our initial numerical simulations. This Perspective not only aims to provide an in-depth overview of the latest fundamental findings in 2D exciton polaritons but also attempts to serve as a valuable resource to prospect explorations of quantum optics and topological photonic applications.
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Affiliation(s)
- Haifeng Kang
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Jingwen Ma
- Faculty of Science and Engineering, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Junyu Li
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
| | - Xiang Zhang
- Faculty of Science and Engineering, The University of Hong Kong, Hong Kong, SAR, P. R. China
- Department of Physics, The University of Hong Kong, Hong Kong, SAR, P. R. China
| | - Xiaoze Liu
- Key Laboratory of Artificial Micro/Nano Structure of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, P. R. China
- Wuhan Institute of Quantum Technology, Wuhan, 430206, P. R. China
- Wuhan University Shenzhen Research Institute, Shenzhen, 518057, P. R. China
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7
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Harkort C, Kudlacik D, Kopteva NE, Yakovlev DR, Karzel M, Kirstein E, Hordiichuk O, Kovalenko MV, Bayer M. Spin-Flip Raman Scattering on Electrons and Holes in Two-Dimensional (PEA) 2 PbI 4 Perovskites. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2300988. [PMID: 37066731 DOI: 10.1002/smll.202300988] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/14/2023] [Indexed: 06/19/2023]
Abstract
The class of Ruddlesden-Popper type (PEA)2 PbI4 perovskites comprises 2D structures whose optical properties are determined by excitons with a large binding energy of about 260 meV. It complements the family of other 2D semiconductor materials by having the band structure typical for lead halide perovskites, that can be considered as inverted compared to conventional III-V and II-VI semiconductors. Accordingly, novel spin phenomena can be expected for them. Spin-flip Raman scattering is used here to measure the Zeeman splitting of electrons and holes in a magnetic field up to 10 T. From the recorded data, the electron and hole Landé factors (g-factors) are evaluated, their signs are determined, and their anisotropies are measured. The electron g-factor value changes from +2.11 out-of-plane to +2.50 in-plane, while the hole g-factor ranges between -0.13 and -0.51. The spin flips of the resident carriers are arranged via their interaction with photogenerated excitons. Also the double spin-flip process, where a resident electron and a resident hole interact with the same exciton, is observed showing a cumulative Raman shift. Dynamic nuclear spin polarization induced by spin-polarized holes is detected in corresponding changes of the hole Zeeman splitting. An Overhauser field of the polarized nuclei acting on the holes as large as 0.6 T can be achieved.
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Affiliation(s)
- Carolin Harkort
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Dennis Kudlacik
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Natalia E Kopteva
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Dmitri R Yakovlev
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Marek Karzel
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Erik Kirstein
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
| | - Oleh Hordiichuk
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093, Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, CH-8600, Dübendorf, Switzerland
| | - Maksym V Kovalenko
- Laboratory of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, CH-8093, Zürich, Switzerland
- Laboratory for Thin Films and Photovoltaics, Empa-Swiss Federal Laboratories for Materials Science and Technology, CH-8600, Dübendorf, Switzerland
| | - Manfred Bayer
- Experimentelle Physik 2, Technische Universität Dortmund, D-44227, Dortmund, Germany
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8
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Kirstein E, Zhukov EA, Yakovlev DR, Kopteva NE, Harkort C, Kudlacik D, Hordiichuk O, Kovalenko MV, Bayer M. Coherent Spin Dynamics of Electrons in Two-Dimensional (PEA) 2PbI 4 Perovskites. NANO LETTERS 2023; 23:205-212. [PMID: 36574606 DOI: 10.1021/acs.nanolett.2c03975] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The versatile potential of lead halide perovskites and two-dimensional materials is merged in the Ruddlesden-Popper perovskites having outstanding optical properties. Here, the coherent spin dynamics in Ruddlesden-Popper (PEA)2PbI4 perovskites is investigated by picosecond pump-probe Kerr rotation in an external magnetic field. The Larmor spin precession of resident electrons with a spin dephasing time of 190 ps is identified. The longitudinal spin relaxation time in weak magnetic fields measured by the spin inertia method is as long as 25 μs. A significant anisotropy of the electron g-factor with the in-plane value of +2.45 and out-of-plane value of +2.05 is found. The exciton out-of-plane g-factor of +1.6 is measured by magneto-reflectivity. This work contributes to the understanding of the spin-dependent properties of two-dimensional perovskites and their spin dynamics.
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Affiliation(s)
- Erik Kirstein
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
| | - Evgeny A Zhukov
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
- Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
| | - Dmitri R Yakovlev
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
- Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia
| | - Nataliia E Kopteva
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
| | - Carolin Harkort
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
| | - Dennis Kudlacik
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
| | - Oleh Hordiichuk
- Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
- EMPA-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
| | - Maksym V Kovalenko
- Department of Chemistry and Applied Biosciences, ETH Zürich, Zürich CH-8093, Switzerland
- EMPA-Swiss Federal Laboratories for Materials Science and Technology, Dübendorf CH-8600, Switzerland
| | - Manfred Bayer
- Experimental Physics 2, Department of Physics, TU Dortmund, 44227 Dortmund, Germany
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