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strong coupling between a plasmon mode and multiple different exciton states

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Science China(Physics,Mechanics & Astronomy) 2023年第4期66卷 84-93页

作者： Junjun Ye Yatao Pan Guanghui Liu Wei Li Renming Liu Ming Geng Zhixiang Liu Zhen Chi Xia Ran Yanmin Kuang Yulu He Lijun Guo School of Physics and Electronics Academy for Advanced Interdisciplinary StudiesInternational Joint Research Laboratory of New Energy Materials and Devices of Henan ProvinceHenan UniversityKaifeng 475004China School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China State Key Laboratory of Optoelectronic Materials and Technologies Schoolof PhysicsSun Yat-sen UniversityGuangzhou 5275China

strong coupling between plasmons and multiple different exciton states(MESs)enables the creation of multiple hybrid polariton states under ambient *** hybrid states possess unique optical properties different from those of their separate identities,making them ideal candidates for exploiting room-temperature multimode hybridization and multiqubit *** this study,we revealed the static spectral response properties of plasmon-MES strong coupling via a fully quantum mechanics *** theoretical predictions were experimentally demonstrated in plasmonic nanocavities containing two and three different exciton ***,the dynamical absorption processes of such strong coupling systems were investigated,and results indicated that the damping of the hybrid polariton states induced by the strong coupling could be markedly modulated by the acoustic oscillations from the plasmonic *** findings contribute a theoretical approach for accurately describing the plasmon-MES interactions and a platform for developing the high-speed active plasmonic devices based on multiqubit strong coupling.

关键词： surface plasmon strong coupling exciton state Rabi splitting transient absorption

strong coupling in silver-molecular J-aggregates-silver structure sandwiched between two dielectric media

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Chinese Physics B 2019年第12期28卷 311-314页

作者： Kunwei Pang Haihong Li Gang Song Li Yu State Key Laboratory of In formation Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China

We theoretically investigate the strong coupling in silver-molecular J-aggregates-silver structure sandwiched between two dielectric media by using classical methods. Fresnel equations are employed to solve our proposed structure. The results show that both the reflection and transmission spectra show a Rabi splitting-like line shape, revealing the strong coupling phenomenon. Furthermore, the radiative angle versus incident wavelength exhibits a Fano line shape. The strong coupling phenomenon can be well tuned by controlling the surface plasmon excitation, such as the incident angle and the thickness of the silver films. Our structure has potential applications in quantum networks, optical switches, and so on.

关键词： surface plasmons Krestchmann configurations strong coupling

strong coupling,charm- and bottom-quark masses from electron-positron annihilation

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Chinese Physics C 2010年第6期34卷 675-679页

作者： J.H.Kühn Institut für Theoretische Teilchenphysik Karlsruhe Institute of Technology

The cross section for electron-positron annihilation into hadrons allows for a precise determination of the strong coupling constant and the charm- and bottom-quark masses. Recent theoretical and experimental results ... 详细信息

关键词： strong coupling quark masses

Fluctuation theorem for entropy production at strong coupling

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Chinese Physics B 2020年第1期29卷 175-180页

作者： Y Y Xu J Liu M Feng Faculty of Science Kunming University of Science and TechnologyKunming 650500China Faculty of Mechanical and Electrical Engineering Kunming University of Science and TechnologyKunming 650500China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhan 430071China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China

Fluctuation theorems have been applied successfully to any system away from thermal equilibrium,which are helpful for understanding the thermodynamic state *** investigate fluctuation theorems for strong coupling between a system and its reservoir,by path-dependent definition of work and heat satisfying the first law of *** present the fluctuation theorems for two kinds of entropy *** is the informational entropy production,which is always non-negative and can be employed in either strong or weak coupling *** other is the thermodynamic entropy production,which differs from the informational entropy production at strong coupling by the effects regarding the *** find that,it is the negative work on the reservoir,rather than the nonequilibrium of the thermal reservoir,which invalidates the thermodynamic entropy production at strong *** results indicate that the effects from the reservoir are essential to understanding thermodynamic processes at strong coupling.

关键词： fluctuation theorem entropy production strong coupling

Empowering magnetic strong coupling and its application for nonlinear refractive index sensing

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Nano Research 2022年第8期15卷 7604-7613页

作者： Song Sun Dong Li Dacheng Wang Zheng Feng Wei Tan Lin Wu Microsystem and Terahertz Research Center China Academy of Engineering PhysicsChengdu 610200China Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China Science Mathematics and Technology(SMT)Singapore University of Technology and Design(SUTD)8 Somapah RoadSingapore 487372Singapore Institute of High Performance Computing A*STAR(Agency for ScienceTechnology and Research)1 Fusionopolis Way#16-16 ConnexisSingapore 138632Singapore

In the context of quantum strong coupling,the magnetic dipole(MD)emitters are largely overlooked due to the rarity of MD source and the non-magnetic nature of matters at high *** on a semi-classic model,we theoretically demonstrate magnetic strong coupling between an MD cluster(Er^(3+):4 I13/2→4 I15/2 transition at 1,550 nm)and an antenna-in-cavity *** is found that placing the plasmonic diabolo/s-diabolo nanoantenna,which supports strong electric/magnetic dipole mode,inside a dielectric cavity could largely improve the strong coupling coefficient while suppressing the cavity loss rate compared to the bare nanoantenna counterparts,empowering the magnetic quantum strong coupling at a level of 104 emitters,which is remarkable considering the weak MD dipole momentum and small hotspot region at high ***,the two Rabi resonance branches undergo highly asymmetrical changes upon a small variation on the environmental refractive index,which leads to an exotic exponential sensitivity profile by tracing the ratio between the two resonances *** proposed magnetic strong coupling for nonlinear refractive index sensing may add a new category to quantum plasmonic sensors.

关键词： nanoplasmonic cavity magnetic dipole emitter strong coupling Rabi-splitting sensing

Optical strong coupling in hybrid metal-graphene metamaterial for terahertz sensing

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Chinese Physics B 2021年第11期30卷 661-665页

作者： Ling Xu Yun Shen Liangliang Gu Yin Li Xiaohua Deng Zhifu Wei Jianwei Xu Juncheng Cao Department of Physics Nanchang UniversityNanchang 330031China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Institute of Space Science and Technology Nanchang UniversityNanchang 330031China Shanghai Institute of Microsystem and Information Chinese Academy of SciencesShanghai 200050China

We propose a terahertz hybrid metamaterial composed of subwavelength metallic slits and graphene plasmonic ribbons for sensing *** special design can cause the interaction between the plasmon resonances of the metallic slits and graphene ribbons,giving rise to a strong coupling effect and Rabi *** balancing in the strong coupling region can be perturbed by the carrier concentration of graphene,which is subject to the analyte on its ***,the detection of analyte can be reflected as a frequency shift of resonance in terahertz transmission *** result shows that this sensor can achieve a theoretical detection limit of 325 electrons or holes per square ***,it also works well as a refractive index sensor with the frequency sensitivity of 485 GHz/*** results may contribute to design of ultra-micro terahertz sensors.

关键词： metamaterial terahertz strong coupling sensor

Enhanced circular dichroism of plasmonic system in the strong coupling regime

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Chinese Physics B 2021年第4期30卷 492-496页

作者： Yun-Fei Zou Li Yu School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

The circular dichroism(CD) signal of a molecule is usually weak,however,a strong CD signal in optical spectrum is desirable because of its wide range of applications in biosensing,chiral photo detection,and chiral *** this work,we show that a strong chiral response can be obtained in a hybridized system consisting of an artificial chiral molecule and a nanorod in the strong coupling *** artificial chiral molecule is composed of six quantum dots in a helix assembly,and its CD signal arises from internal Coulomb interactions between quantum *** CD signal of the hybridized system is highly dependent on the Coulomb interactions and the strong coupling progress through the electromagnetic *** use the coupled oscillator model to analyze strong coupling phenomenon and address that the strong coupling progress can amplify the CD *** work provides a scenario for designing new plasmonic nanostructures with a strong chiral optical response.

关键词： plasmonic chirality strong coupling circular dichroism

Boron nitride nanoresonators for phonon-enhanced molecular vibrational spectroscopy at the strong coupling limit

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Light(Science & Applications) 2017年第1期6卷 55-62页

作者： Marta Autore Peining Li Irene Dolado Francisco J Alfaro-Mozaz Ruben Esteban Ainhoa Atxabal Fèlix Casanova Luis E Hueso Pablo Alonso-González Javier Aizpurua Alexey Y Nikitin Saül Vélez Rainer Hillenbrand CIC nanoGUNE Donostia-San Sebastián 20018Spain Donostia International Physics Center(DIPC) Donostia-San Sebastián 20018Spain IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain Departamento de Física Universidad de OviedoOviedo 33007Spain Centro de Física de Materiales(MPC CSIC-UPV/EHU)Donostia-San Sebastián 20018Spain Current address:Department of Materials ETH ZürichZürich 8093Switzerland CIC nanoGUNE and UPV/EHU Donostia-San Sebastián 20018Spain

Enhanced light-matter interactions are the basis of surface-enhanced infrared absorption(SEIRA)spectroscopy,and conventionally rely on plasmonic materials and their capability to focus light to nanoscale spot *** polariton nanoresonators made of polar crystals could represent an interesting alternative,since they exhibit large quality factors,which go far beyond those of their plasmonic *** recent emergence of van der Waals crystals enables the fabrication of highquality nanophotonic resonators based on phonon polaritons,as reported for the prototypical infrared-phononic material hexagonal boron nitride(h-BN).In this work we use,for the first time,phonon-polariton-resonant h-BN ribbons for SEIRA spectroscopy of small amounts of organic molecules in Fourier transform infrared ***,the interaction between phonon polaritons and molecular vibrations reaches experimentally the onset of the strong coupling regime,while numerical simulations predict that vibrational strong coupling can be fully *** polariton nanoresonators thus could become a viable platform for sensing,local control of chemical reactivity and infrared quantum cavity optics experiments.

关键词： boron nitride phonon polaritons strong coupling surface-enhanced infrared absorption spectroscopy SEIRA

Determination of the strong coupling constant using available experimental data

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Chinese Physics C 2010年第9期34卷 1485-1487页

作者： S.Atashbar Tehrani A.N.Khorramian School of Particles and Accelerators Institute for Research in Fundamental Sciences (IPM) Physics Department Semnan University

We determine the strong coupling constant α s up to 4-loop in perturbative *** QCD requires the measurement of α s over ranges of energy *** this analysis,the value of α s is determined from the unpolarized structure functions data points by minimizing the χ ^2 function between the theory result and experimental *** perturbative QCD calculations from threshold corrections,we obtain α s （M 2 Z ） = 0.1139±0.0020 at N ^3 LO which is in good agreement with the very recently results from the inclusive jet cross section in pp collisions at√ s=1.96 TeV.

关键词： strong coupling DIS data N ^3 LO