Hot carrier dynamics in a dispersionless plasmonic system

  title={Hot carrier dynamics in a dispersionless plasmonic system},
  author={Banoj Kumar Nayak and Shriganesh S. Prabhu and Venu Gopal Achanta},
  journal={arXiv: Mesoscale and Nanoscale Physics},
Hot carrier dynamics in a dispersionless plasmonic structures over a broad wavelength are studied by pump-probe measurements with 45 fs time resolution. The role of direct excited as well as plasmon generated hot carriers on low energy probe plasmons are studied by simultaneous measurement of differential transmittance and reflectance. While the pump fluence dependence on the decay times is linear for hot electrons and plasmon generated hot electrons, when pump is near resonant with the X… 
5 Citations

Figures and Tables from this paper

Role of non-thermal electrons in ultrafast spin dynamics of ferromagnetic multilayer
Quantitative analysis of the E3TM extended three-temperature model reveals that energy flow from non-thermal electrons plays a decisive role in determining the type I and II photoinduced spin dynamics behavior, proposing a new mechanism for understanding ultrafast remagnetization dynamics.
Programmable Organic-Free Negative Differential Resistance Memristor Based on Plasmonic Tunnel Junction.
A novel negative differential resistance (NDR) phenomenon is reported herein based on planar plasmonic tunnel junction, resulting from plasmon-assisted long-range electron tunneling (P-tunneling) and
Relaxation dynamics of hot electrons in the transition metals Au, Ag, Cu, Pt, Pd, and Ni studied by ultrafast luminescence spectroscopy
The ultrafast relaxation dynamics of photoexcited electrons in six transition metals, Au, Ag, Cu, Pt, Pd, and Ni, were investigated using femtosecond luminescence spectroscopy in the infrared region
Surface waves at metal-dielectric interfaces: Material science perspective
Abstract Surface modes at interfaces, especially, the surface plasmon polaritons at metal-dielectric interfaces localize field. Associated applications are well pursued in addition to their basic


Energy-resolved hot carrier relaxation dynamics in monocrystalline plasmonic nanoantennas
Hot carriers are energetic photo-excited carriers driving a large range of chemico-physical mechanisms. At the nanoscale, an efficient generation of these carriers is facilitated by illuminating
Theoretical predictions for hot-carrier generation from surface plasmon decay
It is found that carrier energy distributions are sensitive to the electronic band structure of the metal: gold and copper produce holes hotter than electrons by 1–2 eV, while silver and aluminium distribute energies more equitably between electrons and holes.
Anomalous ultrafast dynamics of hot plasmonic electrons in nanostructures with hot spots.
General principles to enhance the generation of energetic electrons through specifically designed plasmonic nanostructures that could be used in applications where hot electron generation is beneficial, such as in solar photocatalysis, photodetectors and nonlinear devices are developed.
Ultrafast Resonant Dynamics of Surface Plasmons in Gold Nanorods
Electron dynamics in Au nanorods are studied with femtosecond nonlinear spectroscopic techniques, by directly exciting and probing the longitudinal surface plasmon resonance. The dispersive and
Increased rise time of electron temperature during adiabatic plasmon focusing
With femtosecond-resolution measurements, this work confirms the extraordinary capability of plasmonic tapers to generate hot carriers by slowing down plasmons at the taper apex, and evidence a substantial increase of the “lifetime” of the electron gas temperature at the apex.
Nonradiative Plasmon Decay and Hot Carrier Dynamics: Effects of Phonons, Surfaces, and Geometry.
First-principles calculations that capture all of the significant microscopic mechanisms underlying surface plasmon decay and predict the initial excited carrier distributions are presented, including ab initio predictions of phonon-assisted optical excitations in metals, which are critical to bridging the frequency range between resistive losses at low frequencies and direct interband transitions at high frequencies.
Experimental and Ab Initio Ultrafast Carrier Dynamics in Plasmonic Nanoparticles.
Pump-probe measurements of plasmonic nanoparticles are presented along with a complete theoretical description based on first-principles calculations of carrier dynamics and optical response, free of any fitting parameters, to identify the two major contributions of the initial response with distinct signatures.
Theory of Photoinjection of Hot Plasmonic Carriers from Metal Nanostructures into Semiconductors and Surface Molecules
We investigate theoretically the effects of generation and injection of plasmonic carriers from an optically excited metal nanocrystal to a semiconductor contact or to surface molecules. The energy
Optical Generation of Hot Plasmonic Carriers in Metal Nanocrystals: The Effects of Shape and Field Enhancement
We investigate theoretically photogeneration of excited carriers in plasmonic nanocrystals. The theory is based on the solution of the quantum equation of motion for the density matrix. Efficient
Hot-electron nanoscopy using adiabatic compression of surface plasmons.
Adiabatic focusing of surface plasmons on a Schottky diode-terminated tapered tip of nanoscale dimensions allows for a plasmon-to-hot-electron conversion efficiency of ∼30% and it is demonstrated that, with such high efficiency, hot electrons can be used for a new nanoscopy technique based on an atomic force microscopy set-up.