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Plasmonic dimer cavities can induce extreme electric-field hot spots that allow one to access ultrastrong coupling regimes using Raman-type spectroscopy on single vibrating molecules. Using a generalized master equation, we study resonant…

Quantum Physics · Physics 2021-07-29 Stephen Hughes , Alessio Settineri , Salvatore Savasta , Franco Nori

Electromagnetic (EM) coupling between molecular exciton and plasmon has been studied using in Rayleigh scattering or extinction spectroscopy. However, evaluating EM coupling involving subradiant plasmon is challenging because this resonance…

Optics · Physics 2026-05-15 Tamitake Itoh , Yuko S. Yamamoto

We report plasmon-enhanced Raman scattering in graphene coupled to a single plasmonic hotspot measured as a function of laser energy. The enhancement profiles of the G peak show strong enhancement (up to $10^5$) and narrow resonances (30…

This study investigated spectral changes in the absorption cross-sections of single strong coupling systems composed of single silver nanoparticle dimers and a few dye molecules during the quenching of surface-enhanced resonant Raman…

Optics · Physics 2019-06-10 Tamitake Itoh , Yuko S. Yamamoto , Takayuki Okamoto

Surface enhanced Raman scattering mediated by surface plasmons polaritons with wave vector much larger than those of light is considered. The excitation of these polaritons and their efficient Raman scattering due to low group velocity and…

Optics · Physics 2015-06-04 Tomas Lopez-Rios

We present a general model study of surface-enhanced resonant Raman scattering and fluorescence focusing on the interplay between electromagnetic effects and the molecular dynamics. Our model molecule is placed close to two Ag…

Other Condensed Matter · Physics 2007-05-23 Hongxing Xu , Xue-Hua Wang , Martin P. Persson , H. Q. Xu , Mikael Kall , Peter Johansson

Using resonant Raman scattering spectroscopy with 25 different laser lines, we describe the Raman scattering spectra of mono- and multi-layers 2H-molybdenum diselenide (MoSe$_2$) as well as the different resonances affecting the most…

Mesoscale and Nanoscale Physics · Physics 2016-04-19 P. Soubelet , A. E. Bruchhausen , A. Fainstein , K. Nogajewski , C. Faugeras

We present a microscopic model describing the transition to strong coupling regime for an emitter resonantly coupled to a surface plasmon in a metal-dielectric structure. We demonstrate that the shape of scattering spectra is determined by…

Mesoscale and Nanoscale Physics · Physics 2022-07-08 Tigran V. Shahbazyan

The spectral relationships between surface enhanced resonant Raman scattering (SERRS) and plasmon resonance observed in far field scattering cross are investigated using single silver nanoparticle dimers with focusing on the lowest energy…

Optics · Physics 2023-04-07 Tamitake Itoh , Yuko S. Yamamoto

Methods to increase the light scattered from small particles can help improve the sensitivity of many sensing techniques. Here, we investigate the role multiple scattering plays in perturbing the scattered signal when a particle is added to…

Optics · Physics 2021-08-03 Joel Berk , Matthew R. Foreman

Strong coupling of two-dimensional semiconductor excitons with plasmonic resonators enables control of light-matter interaction at the subwavelength scale. Here we develop strong coupling in plasmonic nano-gap resonators that allow…

We present a general model study of surface-enhanced resonant Raman scattering and fluorescence, focusing on the interplay between electromagnetic (EM) effects and the molecular dynamics as treated by a density matrix calculation. The model…

Other Condensed Matter · Physics 2007-05-23 Peter Johansson , Hongxing Xu , Mikael Käll , ;

We consider a hybrid plasmon-exciton system comprised of a resonant molecular subsystem and three Au wires supporting a dipole mode which can be coupled to a dark mode in controllable fashion by variation of a symmetry parameter. The…

Optics · Physics 2015-03-25 Maxim Sukharev , Paul N. Day , Ruth Pachter

Raman spectra obtained by the inelastic scattering of light by crystalline solids contain contributions from first-order vibrational processes (e.g. the emission or absorption of one phonon, a quantum of vibration) as well as higher-order…

Materials Science · Physics 2017-08-22 Yannick Gillet , Stefan Kontur , Matteo Giantomassi , Claudia Draxl , Xavier Gonze

Presented here are studies of the impact of excitation angle on surface enhanced Raman and luminescence spectroscopy of dye immobilised on a plasmon active nanocavity array support. Results show that both Raman and luminescence intensities…

Optics · Physics 2015-05-20 Frances Lordan , James H Rice , Bincy Jose , Robert J Forster , Tia E Keyes

Effects of coupling between a molecular exciton and a surface plasmon (exciton-plasmon coupling) on the luminescence properties of the molecule and the surface plasmons are investigated using the nonequilibrium Green's function method.…

Materials Science · Physics 2013-06-12 Kuniyuki Miwa , Mamoru Sakaue , Hideaki Kasai

Interaction between plasmonic nanostructures and molecules is modeled based on the concept of quantized optical cavity for surface enhanced Raman scattering process. We have found that the background emission from plasmonic nanostructures…

Optics · Physics 2017-03-22 Yuqing Cheng , Jingyi Zhao , Te Wen , Guantao Li , Jianning Xu , Qihuang Gong , Guowei Lu

The amplification of evanescent waves by flat superlens requires a near-resonance coupling which has been linked to resonant surface plasmons. A subtle interplay has been proposed to exist between the excitation of well-defined resonant…

Classical Physics · Physics 2021-01-14 Ali Isa

Strongly coupled plasmon-exciton systems offer promising applications in nanooptics. The classification of the coupling regime is currently debated both from experimental and theoretical perspectives. We present a method to unambiguously…

Mesoscale and Nanoscale Physics · Physics 2023-07-19 Felix Stete , Wouter Koopman , Matias Bargheer

Two-magnon Raman scattering provides important information about electronic correlations in the insulating parent compounds of high-$T_c$ materials. Recent experiments have shown a strong dependence of the Raman signal in $B_{1g}$ geometry…

Strongly Correlated Electrons · Physics 2009-10-30 Dirk K. Morr , Andrey V. Chubukov
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