Nanoplasmonics

Topic Description

Nanoplasmonics studies the interaction of light with metallic nanostructures, in which collective oscillations of electrons — plasmons — make it possible to localize the electromagnetic field at scales smaller than the wavelength of light. The optical response of such materials is determined not only by the choice of their chemical composition but also by their design and structural geometry. All this makes it possible to create media with properties unavailable to conventional optical materials, as well as to resonantly enhance various optical effects.

Laboratory Research Focus

In our research, special attention is paid to hyperbolic metamaterials (HMMs) — artificial composites consisting of metallic nanorods embedded in a dielectric matrix. Such structures possess a number of features: pronounced optical anisotropy, nonlocal optical response, etc. This leads to the emergence of unusual properties of such structures — for example, the existence of the Epsilon-Near-Zero (ENZ) regime, in which one of the main components of the effective permittivity tensor becomes zero. Our laboratory has also conducted research on a number of other plasmonic nanostructures, such as magnetoplasmonic crystals, chiral plasmonic structures, and others.

Key Achievements

To date, the following key results have been obtained in this area:

  1. Active control of the optical response of hybrid structures consisting of HMMs and liquid crystals has been implemented.
  2. Generation of spatial and spatiotemporal optical vortices in HMMs has been demonstrated.
  3. Experimental demonstration of light self-action and enhancement of second-harmonic generation in HMMs due to resonant electric-field enhancement in the spectral vicinity of ENZ.
  4. Enhancement of magneto-optical effects in HMMs has been demonstrated.
  5. Experimental observation of fast- and slow-light effects during the propagation of a laser pulse through HMMs.

Topics for Course and Diploma Projects

Students interested in research are offered the following tasks:

  1. Plasmonic effects in metamaterials with near-zero permittivity.
  2. Metamaterials with near-zero permittivity: optical properties.

Publications on this topic

Ion beam etching of anodic aluminium oxide barrier layer for Au nanorod-based hyperbolic metamaterials
Size effects in optical and magneto-optical response of opal-cobalt heterostructures
Optical effects in magnetoplasmonic crystals based on 1D metal-dielectric lattice
Nonlinear magneto-optical kerr effect in Co/Pt and Co/Ta bilayer films
Tuning the optical properties of hyperbolic metamaterials by controlling the volume fraction of metallic nanorods
Magnetoplasmonic crystal waveguide
Surface plasmon-mediated nanoscale localization of laser-driven sub-terahertz spin dynamics in magnetic dielectrics
Second harmonic generation in core (shell) γ-Fe2O3 (Au) nanoparticles