Imaging of terahertz surface plasmon waves excited on a gold surface by a focused beam.

  title={Imaging of terahertz surface plasmon waves excited on a gold surface by a focused beam.},
  author={Raimund Mueckstein and Oleg Mitrofanov},
  journal={Optics express},
  volume={19 4},
Surface plasmon polariton (SPP) waves formed near a tightly focused THz beam on a metallic surface are detected by an integrated sub-wavelength aperture THz near-field probe. The probe allows mapping the electric field pattern of the SPP wave and tracking the SPP propagation from the center of the focal spot. The SPP nature of the observed wave is confirmed by time-resolved measurements. Analysis of the detected patterns leads to an explanation of how THz SPP waves can be detected by the… 

Figures from this paper

Near-field imaging of terahertz plasmon waves with a subwavelength aperture probe

Visualization of terahertz (THz) plasmons with local probes allows studying ultra-fast plasmonic phenomena in the time domain. We demonstrate that the integrated sub-wavelength aperture near-field

Imaging and Analysis of THz Surface Plasmon Polariton Waves with the Integrated Sub-wavelength Aperture Probe

We demonstrate that the integrated sub-wavelength aperture probe designed for THz near-field scanning probe microscopy can be used to map surface plasmon waves at THz frequencies. Observed near-field

Near-Field Spectroscopy and Imaging of Subwavelength Plasmonic Terahertz Resonators

We present the temporal evolution of the terahertz (THz) field leading to the excitation of plasmonic resonances in carbon microfibers. The field evolution is mapped in space and time for the 3/2

Modelling of surface waves on a THz antenna detected by a near-field probe.

The first assessment of the probe invasiveness is carried out and it is found that the pattern of the surface plasmon wave on the antenna is not modified significantly by the proximity of the Probe, making the experimental system an effective tool for near-field imaging of THz antennas and other metallic structures.

Terahertz probe for spectroscopy of sub-wavelength objects.

A system of two probes is designed for terahertz (THz) time-domain spectroscopy of sub-wavelength size objects to be applied to single micrometer-size objects in the 1-2.5THz region.

Digital holographic imaging of terahertz surface waves

To push the development of surface plasmonic devices (SPDs), a practical characterization means is essential for accurately observing a THz surface wave (TSW). In this work, a THz digital holographic

Zenneck THz surface waves-assisted imaging of subwavelength dielectric particles

Electromagnetic Zenneck THz surface waves propagating on a bow-tie antenna are employed for time-resolved near-field imaging of subwavelength-size SrTiO3 and TiO2 particles. This approach provides

Application of Surface Waves for THz Spectroscopy

Weak coupling of THz waves to sub-wavelength size objects makes detection and spectroscopic analysis of small amounts of illicit materials challenging at THz frequencies. THz surface waves can be

Visualization of terahertz surface waves propagation on metal foils

A THz digital holographic imaging system is employed to coherently exhibit temporal variations and spectral properties of TSWs activated by a rectangular or semicircular slit structure on metal foils, and it can be anticipated that this imaging system will provide a versatile tool for analyzing the performance and principle of SPDs.



Excitation of Surface Plasmon Polaritons by a Focused Laser Beam

In this chapter, the idea of the localized surface-plasmon-polariton (SPP) is described. The excitation method of the localized SPP and some theoretical analyses of its field distributions on a

Femtosecond microscopy of surface plasmon polariton wave packet evolution at the silver/vacuum interface.

A movie of the dispersive and dissipative propagation of surface plasmon polariton (SPP) wave packets at a silver/vacuum interface is recorded by the interferometric time-resolved photoemission

Surface plasmon interference excited by tightly focused laser beams.

It is shown that interfering surface plasmon polaritons can be excited with a focused laser beam at normal incidence to a plane metal film and can be accurately explained by use of the angular spectrum representation.

Terahertz near-field imaging of metallic subwavelength holes and hole arrays

Metallic microstructures are investigated by time-resolved terahertz near-field imaging. By our approach, we can directly follow field diffraction from subwavelength structures as well as coupling to

Local Excitation, Scattering, and Interference of Surface Plasmons.

The optical probe of a scanning near-field optical microscope is shown to act as a point source of surface plasmon (SP) polaritons on gold and silver films, which provide detailed information about SP scattering, reflection, and interference phenomena.

Launching and decoupling surface plasmons via micro-gratings

Controlling separately the launching of surface plasmons and their recovery as freely propagating light is essential for the development of surface plasmon photonic circuits. With this target in

Waveguide mode imaging and dispersion analysis with terahertz near-field microscopy

Propagation of terahertz waves in hollow metallic waveguides depends on the waveguide mode. Near-field scanning probe terahertz microscopy is applied to identify the mode structure and composition in

THz surface wave collapse on coated metal surfaces.

Experimental measurements of the THz surface wave on an aluminum surface covered with a 12.5 microm thick dielectric layer have completely characterized the resultant single-mode dielectrics layer THzsurface wave (DL-TSW), and the measured frequency-dependent exponential fall-off of the evanescent wave from the surface agrees well with theory.

Near-field microscope probe for far infrared time domain measurements

A near-field probe fabrication technique for far-infrared frequencies based on photoconducting antennas is developed by means of an aperture and protruding high refractive index tip, and may be used for near- field transmission microscopy in illumination and collection modes.