Y.A.Pusep Institute of Physics of São Carlos, University of São Paulo Collaborators: Experiment – A.D.Rodrigues, UFSCar. Theory - S.S.Sokolov, B.Verkin.

Slides:

Advertisements

Similar presentations

A.V. Koudinov, Yu. G. Kusrayev A.F. Ioffe Physico-Technical Institute St.-Petersburg, Russia L. C. Smith, J. J. Davies, D. Wolverson Department.

Advertisements

Anderson localization: from single particle to many body problems.

Separation of neutral and charge modes in one dimensional chiral edge channels

SERS Biosensor for Endocrine Disruption Biomarker: Vitellogenin

Nanophotonics Class 2 Surface plasmon polaritons.

Strong coupling between Tamm Plasmon and QW exciton

SPECTRAL AND DISTANCE CONTROL OF QUANTUM DOTS TO PLASMONIC NANOPARTICLES INTERACTIONS P. Viste, J. Plain, R. Jaffiol, A. Vial, P. M. Adam, P. Royer ICD/UTT.

Probing Superconductors using Point Contact Andreev Reflection Pratap Raychaudhuri Tata Institute of Fundamental Research Mumbai Collaborators: Gap anisotropy.

Optical properties of (SrMnO 3 ) n /(LaMnO 3 ) 2n superlattices: an insulator-to-metal transition observed in the absence of disorder A. Perucchi.

Optics of Nanostructures: Science, Technology, Applications Sergey V. Gaponenko Institute of Molecular and Atomic Physics National Academy of Sciencs of.

Collective Response of Atom Clusters and Nuclei: Role of Chaos Trento April 2010 Mahir S. Hussein University of Sao Paulo.

GaAs band gap engineering by colloidal PbS quantum dots Bruno Ullrich Instituto de Ciencias Físicas, Universidad Nacional Autónoma de México, Cuernavaca,

Plasmonics in double-layer graphene

Propagation of surface plasmons through planar interface Tomáš Váry Peter Markoš Dept. Phys. FEI STU, Bratislava.

Beam manipulation via plasmonic structure Kwang Hee, Lee Photonic Systems Laboratory.

School of Physics and Astronomy, University of Nottingham, Nottingham, NG7 2RD, UK. Electrically pumped terahertz SASER device using a weakly coupled AlAs/GaAs.

Materials for Thermoelectric Applications Jorge O. Sofo Department of Physics, Department of Materials Science and Engineering, and Materials Research.

Surface Enhanced Infrared Absorption (SEIRA) Spectroscopy

Magnificent Optical Properties of Noble Metal Spheres, Rods and Holes Peter Andersen and Kathy Rowlen Department of Chemistry and Biochemistry University.

1 Simulation and Detection of Relativistic Effects with Ultra-Cold Atoms Shi-Liang Zhu ( 朱诗亮 ) School of Physics and Telecommunication.

Stability of RVB state with respect to charge modulations Rastko Sknepnek Iowa State University and DOE Ames Lab In collaboration with: Jun Liu and Joerg.

Anderson Localization and Nonlinearity in One-Dimensional Disordered Photonic Lattices Yoav Lahini 1, Assaf Avidan 1, Francesca Pozzi 2, Marc Sorel 2,

H. C. Siegmann, C. Stamm, I. Tudosa, Y. Acremann ( Stanford ) On the Ultimate Speed of Magnetic Switching Joachim Stöhr Stanford Synchrotron Radiation.

Energy Level diagram for n- 2 level atoms. Radiation from an Extended Sample Destroy photon Raise Energy level Interaction with Radiation field.

Theoretical investigations on Optical Metamaterials Jianji Yang Supervisor : Christophe Sauvan Nanophotonics and Electromagnetism Group Laboratoire Charles.

1 K. Stasiewicz, Plasma Space Science Center, NCKU Swedish Institute of Space Physics, Uppsala Multi-spacecraft studies of nonlinear waves.

Rodolfo Jalabert CHARGE AND SPIN DIPOLE RESONANCES IN METALLIC NANOPARTICULES : collective versus single-particle excitations R. Molina (Madrid) G. Weick.

H. J. Metcalf, P. Straten, Laser Cooling and Trapping.

Picosecond needs for phonon dynamics in nanoscience / energy science Yuelin Li, X-ray Science Division, Argonne National Laboratory.

2011/12/14 2nd term M1 colloquium Creation of huge metal-insulator domain and its electrical conduction property in VO 2 thin film on TiO 2 (001) substrate.

Integrated optical tornadoes for efficient light harvesting Svetlana V. Boriskina, Selcuk Yerci & Gang Chen NanoEngineering group Department of Mechanical.

(M.eq.) Size dependence of the number, frequencies and radiative decays of plasmon modes in a spherical free-electron cluster K.Kolwas, A.Derkachova and.

Lecture 11: Quarks inside the proton 9/10/ Idea: try to identify a kinematic regime in which the electrons scatter from pointlike constituents.

The authors gratefully acknowledge the financial support of the EPSRC High slope efficiency liquid crystal lasers designed through material parameter optimisation.

Electromagnetic field radiated by a point emitter on a graphene sheet Alexey Nikitin Instituto de Ciencia de Materiales de Aragón (Universidad de Zaragoza-CSIC)

Engineering Spontaneous Emission in Hybrid Nanoscale Materials for Optoelectronics and Bio-photonics Arup Neogi Department of Physics and Materials Engineering.

All-Optical Field-Induced Second-Harmonic Generation

Effect of Thin Coatings on Surface Plasmon-Enhanced Infrared Spectroscopy using Ni Mesh Microarrays Kenneth R. Rodriguez, Shannon Teeters- Kennedy, Hong.

0 APS-Sherwood Texas 2006-April Study of nonlinear kinetic effects in Stimulated Raman Scattering using semi- Lagrangian Vlasov codes Alain Ghizzo.

Magnetization dynamics

Outline Damping mechanisms  Plasmons in ribbons Experimental results Graphene Nanophotonics Benasque, 2013, Mar Mar 08 Momentum dependence and losses.

J.R.Krenn – Nanotechnology – CERN 2003 – Part 3 page 1 NANOTECHNOLOGY Part 3. Optics Micro-optics Near-Field Optics Scanning Near-Field Optical Microscopy.

Light-induced instabilities in large magneto-optical traps G. Labeyrie, F. Michaud, G.L. Gattobigio, R. Kaiser Institut Non Linéaire de Nice, Sophia Antipolis,

Nanostructured Thermoelectric Materials

Spin-wave nanograting coupler Haiming Yu 1,2, Georg Dürr 1, Rupert Huber 1, Michael Bahr 1, Thomas Schwarze 1, Florian Brandl 1, and Dirk Grundler 1 1.

R. Kupfer, B. Barmashenko and I. Bar

Strong coupling between a metallic nanoparticle and a single molecule Andi Trügler and Ulrich Hohenester Institut für Physik, Univ. Graz

Drude weight and optical conductivity of doped graphene Giovanni Vignale, University of Missouri-Columbia, DMR The frequency of long wavelength.

Wigner-Mott scaling of transport near the two-dimensional metal-insulator transition Milos Radonjic, D. Tanaskovic, V. Dobrosavljevic, K. Haule, G. Kotliar.

Superconductivity in HgBa 2 Ca m-1 Cu m O 2m+2+δ (m=1,2, and 3) under quasihydrostatic pressures L. Gao et al., Phys. Rev. B 50, 4260 (1994) C. Ambrosch-Draxl.

Quenching of Fluorescence and Broadband Emission in Yb 3+ :Y 2 O 3 and Yb 3+ :Lu 2 O 3 3rd Laser Ceramics Symposium : International Symposium on Transparent.

Raman Scattering As a Probe of Unconventional Electron Dynamics in the Cuprates Raman Scattering As a Probe of Unconventional Electron Dynamics in the.

Fawaz S. K. Aldafeery. Introduction Quantum memories are important elements for quantum information processing applications such as quantum networks,

OPTOFLUIDIC DEVICES FOR SINGLE CELL MANIPULATION Ana Rita Ribeiro, Ariel Guerreiro, Pedro Jorge New Challenges in the European Area - Young Scientist's.

Structural Determination of Solid SiH 4 at High Pressure Russell J. Hemley (Carnegie Institution of Washington) DMR The hydrogen-rich solids are.

Superconductivity with T c up to 4.5 K 3d 6 3d 5 Crystal field splitting Low-spin state:

Nanolithography Using Bow-tie Nanoantennas Rouin Farshchi EE235 4/18/07 Sundaramurthy et. al., Nano Letters, (2006)

Single Molecule Raman Detection with a Composite Microresonator and Metal Nanocavity System Xudong Fan (University of Missouri – Columbia) WGM field profile.

Electronically Driven Structure Changes of Si Captured by Femtosecond Electron Diffraction Outreach/Collaboration with other research groups, showing impact.

My research topics related to surface plasmon

Thermal and electrical quantum Hall effects in ferromagnet — topological insulator — ferromagnet junction V. Kagalovsky 1 and A. L. Chudnovskiy 2 1 Shamoon.

SPINTRONICS Submitted by: K Chinmay Kumar N/09/

Introduction of Nanoplasmonics 2011 Spring Semester.

Direct Observation of Polariton Waveguide in ZnO nanowire at Room Temperature motivation abstract We report the direct experimental evidence of polariton.

Structured Electron Beams from Nano-engineered Cathodes

Electrical Engineering

Figure 6 Selected examples of TERS applications in material systems

Magneto-Photoluminescence of Carbon Nanotubes at Ultralow Temperatures

Collective Dynamics of Nanoscale Magnets

Fig. 1 Plasmonic pumping experiment and photoinduced near-field optical response in Hg0.81Cd0.19Te. Plasmonic pumping experiment and photoinduced near-field.

Presentation transcript:

Y.A.Pusep Institute of Physics of São Carlos, University of São Paulo Collaborators: Experiment – A.D.Rodrigues, UFSCar. Theory - S.S.Sokolov, B.Verkin Institute for Low- Temperature Physics and Engineering, National Academy of Sciences of Ukraine. Samples – H.Arakaki, C.A. de Souza, IFSC/USP.

Why plasmons ? Advantages of optical and electrical circuits: Fast data transfer by transmitting optical signals through minuscule nanoscale structures. Optical fibers versus electrical circuits. Diffraction limit. Manipulation of plasmons (localization and propagation).

1. Electrons: single-particle excitations 2. Plasmons: collective excitations

1.Random superlattices 2.Raman scattering by collective excitations 3.Plasmon localization: theory and experiment 4.Conclusions 1.Random superlattices 2.Raman scattering by collective excitations 3.Plasmon localization: theory and experiment 4.Conclusions

Electrons  (  T = 0)  0,  /  T < 0  (  T = 0) = 0,  /  T > 0 metal (k F l>1): insulator (k F l<1): Obs: l is the electron free path length, k F = 2 π / λ e, λ e is the electron wavelength.

Criterion of Plasmon localization - ?

Plasmon wave function: with Results of calculations Neutral impurity scattering potential:

Localized plasmon: L c < R 0 Delocalized plasmon: L c > R 0 2. Relation between L c and R 0 determine propagation of plasmons: 2. Relation between L c and R 0 determine propagation of plasmons: 1. Plasmon damping ( Г p ) independent of disorder parameter (L c, δ ) indicates localization. 1. Plasmon damping ( Г p ) independent of disorder parameter (L c, δ ) indicates localization. Criteria of Plasmon localization

Non-conservation of quase-momentum [Yu.A.Pusep, et al., Phys.Rev. B 58, (1998)]:

Doped superlattices (weak plasmon localization) Doped superlattices (weak plasmon localization) Disordered superlattices (strong plasmon localization) Disordered superlattices (strong plasmon localization) L c > R 0 L c < R 0

L c > R 0 L c < R 0 Weak plasmon localization: (plasmonic “metal”) Weak plasmon localization: (plasmonic “metal”) Strong plasmon localization: (plasmonic “insulator”) Strong plasmon localization: (plasmonic “insulator”) Temperature Effect

Delocalized plasmon: Lc > Ro – the increasing disorder results in increasing plasmon linewidth; Localized Plasmon: Lc < Ro – no influence of the disorder on plasmon linewidth; The independence of the plasmon linewidth on disorder is the manifestation of plasmon localization. The increasing temperature enhances the localization of the weakly localized plasmons, while it causes the delocalization of the strongly localized plasmons. Yu.A.Pusep, A.D.Rodrigues, S.S.Sokolov, Phys.Rev.B 80, (2009).

Damped plasmon : Overdamped plasmon: Non-conservation of the quase-momentum:

Electrons T.F.Rosenbaum et al., Phys.Rev.Lett. 45, 1723 (1980)Y.Liu, et al., Phys.Rev.Lett. 67, 2068 (1991)  (  T = 0)  0,  /  T < 0  (  T = 0) = 0,  /  T > 0 metal (k F l>1): insulator (k F l<1):