Detection Of Surface Plasmon Polaritons Research Articles

Anisotropic Generation and Detection of Surface Plasmon Polaritons Using Near-Field Apertured Probes

Anisotropic Generation and Detection of Surface Plasmon Polaritons Using Near-Field Apertured Probes

Wavelength-Polarization Multiplexer for Routing and Detection of Surface Plasmon Polaritons Based on Plasmonic Gratings

High-bandwidth and high-speed plasmonic interconnection is a long-term goal in constructing next-generation optoelectronic integrated circuits (OEICs). Here, we report a strategy to achieve plasmon...

Investigation of leaky and bound modes of graphene surface plasmons

In this paper, the dispersion equation for TM polarized surface plasmon modes in the graphene layer embedded in a layered structure has been derived and numerically solved in THz frequencies (0.5–10 meV). Our model results show that this configuration, depending on the frequency region, can support both bound and leaky surface plasmons. Investigation of the supporting frequency region, electromagnetic field distribution, and propagation length of these two modes has been studied. Comparison of these modes with bound modes propagated in a graphene layer surrounded by two semi-infinite media shows that the propagation characteristics are strongly affected by the coupling effects of a high refractive index medium in its neighbor. The leakage of the power into this medium results in distinct decreasing of the propagation length in special frequencies which depend on the geometrical parameters. Additionally, the radiation efficiency depends on the frequency and it can be modified by the structure parameters. This radiation can be important in designing the plasmonic devices such as plasmonic antennas and may be applicable for light detection of surface plasmon polaritons.

Electronic detection of surface plasmon polaritons by metal-oxide-silicon capacitor

An electronic detector of surface plasmon polaritons (SPPs) is reported. SPPs optically excited on a metal surface using a prism coupler are detected by using a close-coupled metal-oxide-silicon (MOS) capacitor. Incidence-angle dependence is explained by Fresnel transmittance calculations, which also are used to investigate the dependence of photo-response on structure dimensions. Electrodynamic simulations agree with theory and experiment and additionally provide spatial intensity distributions on and off the SPP excitation resonance. Experimental dependence of the photoresponse on substrate carrier type, carrier concentration, and back-contact biasing is qualitatively explained by simple theory of MOS capacitors.

Excitonic Resonant Emission–Absorption of Surface Plasmons in Transition Metal Dichalcogenides for Chip-Level Electronic–Photonic Integrated Circuits

The monolithic integration of electronics and photonics has attracted enormous attention due to its potential applications. However, the realization of such hybrid circuits has remained a challenge because it requires optical communication at nanometer scales. A major challenge to this integration is the identification of a suitable material. After discussing the material aspect of the challenge, we identified atomically thin transition metal dichalcogenides (TMDs) as a perfect material platform to implement the circuit. The selection of TMDs is based on their very distinct property: monolayer TMDs are able to emit and absorb light at the same wavelength determined by direct exciton transitions. To prove the concept, we fabricated simple devices consisting of silver nanowires as plasmonic waveguides and monolayer TMDs as active optoelectronic media. Using photoexcitation, direct optical imaging and spectral analysis, we demonstrated generation and detection of surface plasmon polaritons by monolayer TMDs. Regarded as novel materials for electronics and photonics, transition metal dichalcogenides are expected to find new applications in next generation integrated circuits.

A Concentric Plasmonic Platform for the Efficient Excitation of Surface Plasmon Polaritons

We propose a plasmonic device consisting of a concentric ring grating acting as an efficient tool for directional launching and detection of surface plasmon polaritons (SPPs). Numerical simulations and optical characterizations are used to study the fabricated structured gold surface. We demonstrate that this circularly symmetrical plasmonic device provides an efficient interface between free space radiation and SPPs. This structure offers an excellent platform for the study of hybrid plasmonics in general and of plasmon-emitter couplings in particular, such as those occurring when exciting dye molecules placed inside the ring. As illustrated in this work, an interesting property of the device is that the position of excitation determines the direction of propagation of the SPPs, providing a flexible mean of studying their interactions with molecules or dipole-like emitters placed on the surface.

Electrical detection of confined gap plasmons in metal–insulator–metal waveguides

Plasmonic waveguides offer promise in providing a solution to the bandwidth limitations of classical electrical interconnections1,2,3. Fast, low-loss and error-free signal transmission has been achieved in long-range surface plasmon polariton waveguides4,5. Deep subwavelength plasmonic waveguides with short propagation lengths have also been demonstrated6,7, showing the possibility of matching the sizes of optics and today's electronic components. However, in order to combine surface plasmon waveguides with electronic circuits, new high-bandwidth electro-optical transducers need to be developed. Here, we experimentally demonstrate the electrical detection of surface plasmon polaritons in metallic slot waveguides. By means of an integrated metal–semiconductor–metal photodetector, highly confined surface plasmon polaritons in a metal–insulator–metal waveguide are detected and characterized. This approach of integrating electro-optical components in metallic waveguides could lead to the development of advanced active plasmonic devices and high-bandwidth on-chip plasmonic circuits. Electrical detection and characterization of gap plasmons is achieved by means of an integrated metal–semiconductor–metal photodetector. Integration of electro–optical components in metallic waveguides may lead to active high-bandwidth on-chip nano-optical circuits.

Organic diodes as monolithically integrated surface plasmon polariton detectors

The authors show that organic p∕n heterojunction diodes enable the direct electric detection of surface plasmon polaritons (SPPs). The organic diodes are built from two organic semiconductor thin film layers with an area of 150×500μm2 deposited on an extended silver thin film. Besides serving as the bottom electrode of the diode this silver thin film is as well a waveguide feeding SPPs to the diode area. The authors visualize the direct SPP detection by a spatially resolved induced current map.