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Gülmüs M, Possmayer T, Tilmann B, Butler P, Sharp ID, Menezes LDS, Maier SA, Sortino L. Photoluminescence modal splitting via strong coupling in hybrid Au/WS 2/GaP nanoparticle-on-mirror cavities. NANOSCALE 2024; 16:18843-18851. [PMID: 39302648 DOI: 10.1039/d4nr03166k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/22/2024]
Abstract
By integrating dielectric and metallic components, hybrid nanophotonic devices present promising opportunities for manipulating nanoscale light-matter interactions. Here, we investigate hybrid nanoparticle-on-mirror optical cavities, where semiconductor WS2 monolayers are positioned between gallium phosphide (GaP) nanoantennas and a gold mirror, thereby establishing extreme confinement of optical fields. Prior to integration of the mirror, we observe an intermediate coupling regime from GaP nanoantennas covered with WS2 monolayers. Upon introduction of the mirror, enhanced interactions lead to modal splitting in the exciton photoluminescence spectra, spatially localized within the dielectric-metallic gap. Using a coupled harmonic oscillator model, we extract an average Rabi splitting energy of 22.6 meV at room temperature, at the onset of the strong coupling regime. Moreover, the characteristics of polaritonic emission are revealed by the increasing Lorentzian linewidth and energy blueshift with increasing excitation power. Our findings highlight hybrid nanophotonic structures as novel platforms for controlling light-matter coupling with atomically thin materials.
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Affiliation(s)
- Merve Gülmüs
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany.
| | - Thomas Possmayer
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany.
| | - Benjamin Tilmann
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany.
| | - Paul Butler
- Walter Schottky Institute, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
- Physics Department, TUM School of Natural Sciences, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Ian D Sharp
- Walter Schottky Institute, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
- Physics Department, TUM School of Natural Sciences, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany
| | - Leonardo de S Menezes
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany.
- Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil
| | - Stefan A Maier
- School of Physics and Astronomy, Monash University, Clayton, Victoria 3800, Australia
- The Blackett Laboratory, Department of Physics, Imperial College London, London, SW7 2BW, UK
| | - Luca Sortino
- Chair in Hybrid Nanosystems, Nanoinstitute Munich, Faculty of Physics, Ludwig-Maximilians-Universität München, 80539 Munich, Germany.
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Sangeetha A, Reivanth K, Thrupthika T, Ramya S, Nataraj D. Strong coupling of hybrid states of light and matter in cavity-coupled quantum dot solids. Sci Rep 2023; 13:16662. [PMID: 37794042 PMCID: PMC10551025 DOI: 10.1038/s41598-023-42105-1] [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: 06/30/2023] [Accepted: 09/05/2023] [Indexed: 10/06/2023] Open
Abstract
The formation of plasmon-exciton (plexciton) polariton is a direct consequence of strong light-matter interaction, and it happens in a semiconductor-metal hybrid system. Here the formation of plasmon-exciton polaritons was observed from an AgTe/CdTe Quantum Dot (QD) solid system in the strong coupling regime. The strong coupling was achieved by increasing the oscillator strength of the excitons by forming coupled QD solids. The anti-crossing-like behaviour indicates the strong coupling between plasmonic and excitons state in AgTe/CdTe QD solids, resulting in a maximum Rabi splitting value of 225 meV at room temperature. The formation of this hybrid state of matter and its dynamics were studied through absorption, photoluminescence, and femtosecond transient studies.
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Affiliation(s)
- Arumugam Sangeetha
- Quantum Materials & Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - Kanagaraj Reivanth
- Quantum Materials & Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - Thankappan Thrupthika
- Quantum Materials & Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - Subramaniam Ramya
- Quantum Materials & Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India
| | - Devaraj Nataraj
- Quantum Materials & Energy Devices Laboratory, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.
- UGC-CPEPA Centre for Advanced Studies in Physics for the Development of Solar Energy Materials and Devices, Department of Physics, Bharathiar University, Coimbatore, 641 046, Tamil Nadu, India.
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Lee H, Koo Y, Kumar S, Jeong Y, Heo DG, Choi SH, Joo H, Kang M, Siddique RH, Kim KK, Lee HS, An S, Choo H, Park KD. All-optical control of high-purity trions in nanoscale waveguide. Nat Commun 2023; 14:1891. [PMID: 37045823 PMCID: PMC10097695 DOI: 10.1038/s41467-023-37481-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 03/20/2023] [Indexed: 04/14/2023] Open
Abstract
The generation of high-purity localized trions, dynamic exciton-trion interconversion, and their spatial modulation in two-dimensional (2D) semiconductors are building blocks for the realization of trion-based optoelectronic devices. Here, we present a method for the all-optical control of the exciton-to-trion conversion process and its spatial distributions in a MoS2 monolayer. We induce a nanoscale strain gradient in a 2D crystal transferred on a lateral metal-insulator-metal (MIM) waveguide and exploit propagating surface plasmon polaritons (SPPs) to localize hot electrons. These significantly increase the electrons and efficiently funnel excitons in the lateral MIM waveguide, facilitating complete exciton-to-trion conversion even at ambient conditions. Additionally, we modulate the SPP mode using adaptive wavefront shaping, enabling all-optical control of the exciton-to-trion conversion rate and trion distribution in a reversible manner. Our work provides a platform for harnessing excitonic quasiparticles efficiently in the form of trions at ambient conditions, enabling high-efficiency photoconversion.
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Affiliation(s)
- Hyeongwoo Lee
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Yeonjeong Koo
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Shailabh Kumar
- Department of Medical Engineering, California Institute of Technology (Caltech), Pasadena, CA, 91125, USA
- Meta Vision Lab, Samsung Advanced Institute of Technology (SAIT), Pasadena, CA, 91101, USA
| | - Yunjo Jeong
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk, 55324, Republic of Korea
| | - Dong Gwon Heo
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Soo Ho Choi
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea
| | - Huitae Joo
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Mingu Kang
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Radwanul Hasan Siddique
- Department of Medical Engineering, California Institute of Technology (Caltech), Pasadena, CA, 91125, USA
- Meta Vision Lab, Samsung Advanced Institute of Technology (SAIT), Pasadena, CA, 91101, USA
| | - Ki Kang Kim
- Center for Integrated Nanostructure Physics, Institute for Basic Science (IBS), Suwon, 16419, Republic of Korea
- Department of Energy Science, Sungkyunkwan University (SKKU), Suwon, 16419, Republic of Korea
| | - Hong Seok Lee
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea.
| | - Sangmin An
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Hyuck Choo
- Department of Medical Engineering, California Institute of Technology (Caltech), Pasadena, CA, 91125, USA.
- Advanced Sensor Lab, Device Research Center, Samsung Advanced Institute of Technology (SAIT), Suwon, 16678, Republic of Korea.
| | - Kyoung-Duck Park
- Department of Physics, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
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Li J, Deng X, Jin L, Wang Y, Wang T, Liang K, Yu L. Strong coupling of second harmonic generation scattering spectrum in a diexcitionic nanosystem. OPTICS EXPRESS 2023; 31:10249-10259. [PMID: 37157576 DOI: 10.1364/oe.485167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Diexcitonic strong coupling between quantum emitters and localized surface plasmon has attracted more attention recently because it can provide multiple qubit states for future quantum information technology at room temperature. In a strong coupling regime, nonlinear optical effects can offer new routes for developing quantum devices, but it is rarely reported. In this paper, we established the hybrid system consisting of J-aggregates-WS2-cuboid Au@Ag nanorods, which can realize diexcitonic strong coupling and second harmonic generation (SHG). We find that multimode strong coupling has been achieved not only in the fundamental frequency scattering spectrum but also in the SHG scattering spectrum. SHG scattering spectrum shows three plexciton branches, similar to the splitting in the fundamental frequency scattering spectrum. Furthermore, the SHG scattering spectrum can be modulated by tuning the armchair direction of the crystal lattice, pump polarization direction, and plasmon resonance frequency, which makes our system very promising in the quantum device at room temperature. Moreover, we develop coupled nonlinear harmonic oscillator model theory to explain the nonlinear diexcitonic strong coupling mechanism. The calculated results by the finite element method accord well with our theory. The nonlinear optical properties of the diexcitonic strong coupling can provide potential applications such as quantum manipulation, entanglement, and integrated logic devices.
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