Plasmonic antenna thesis

Get PDF Abstract Periodic rectangular gold nanomonopoles and nanodipoles in a piecewise inhomogeneous background, consisting of a silicon substrate and a dielectric aqueous cover, have been investigated extensively via 3D finite-difference time-domain simulations.

Now, internal redistribution processes occur between different states of coronene. BPR avoids the need for small grain media but it can be difficult to address the patterned bits at very small track pitch using a conventional write head.

Finally, possible approaches are proposed to optimize quantum yield of plasmon-induced current enhancement. If the material has been adapted instead of reproduced from the original RSC publication "Reproduced from" can be substituted with "Adapted from". He has filed more than 30 US patents. His thesis research at Cornell included the first demonstrations of single molecule vibrational spectroscopy and manipulation using a scanning tunneling microscope, for which he won the Morton M.

These redistributions are much faster than any radiation relaxaion of the states itself. Focusing on Al, I will move on to the next category that discusses Plasmonic antenna thesis other plasmonic nanostructures to achieve UV nano-focusing - the V-groove geometry, nano-crescent antenna array coupled to a ground plane, and two variations on a 3D nano-cavity antenna array.

An approximate expression resting on modal results is proposed for the resonant length of nanomonopoles, and a simple equivalent circuit, also resting on modal results, but involving transmission lines and a capacitor modelling the gap is proposed to determine the resonant wavelength of nanodipoles.

Tunable emission from two-dimensional semiconductor with platelet optical antennas

The smallest antenna gap size that was achieved was 46 nm. This writing technique allows one to use extremely high anisotropy media such as L10 FePt for reduced grain Plasmonic antenna thesis while maintaining the requirements of thermal stability and writability. In this thesis, two types of room-temperature high-responsivity graphene-based THz detectors are presented, relying on the unique properties of graphene and the function of plasmonic antenna arrays which boost the interaction between THz waves and graphene.

As we have seen earlier, plasmonic nanoantennas may be used to realize effects that were impossible before, for example to allow forbidden transitions.

For reproduction of material from PPS: For reproduction of material from NJC: Finally the behavior of localized surface plasmon resonators is studied and chimera stats which are the concurrent combination of synchronous and incoherent oscillations in a set of identical oscillators is shown for the first time in the optical regime.

Second application is dedicated to the field of intrachip optical communication which shows how VO2 phase transition Plasmonic antenna thesis effectively switch a communicating antenna on and off.

Designing nanoparticle-based resonant elements is a promising route for achieving optical metamaterials with smoother resonance dispersion and lower optical losses. The plasmonic device creates an intense optical pattern in the near-field, heating the disk at the nanometer scale.

This would simplify the identification of these molecules to a great extent. Similarly, nanoparticle-based split-ring resonators provide significant size reduction that could be used for smaller metamaterial and metasurface building blocks.

The fluidic structure of the device was fabricated using UV-nanoimprint lithography, and the gold plasmonic antennas were fabricated using a shadow evaporation and lift-off process. The molecule is placed inside the feed of the carefully designed graphene antenna. Therefore, motivated by its tremendous potential in the biochemistry and photochemical applications, this presentation focuses on the advancement of UV Plasmonics in terms of metallic nanostructure design, fabrication and material characterization.

Search articles by author. Its tunable conductivity makes the material a prime candidate for sophisticated light-matter interactions.

Nanofabrication procedures are optimized to develop Au nano-antenna arrays on SrTiO3 substrate, to determine the photocurrent dependence on illumination condition and mechanisms of hot electron effect. The application of selective enhancement cannot be realized with conventional plasmonic structures made of metals for two main reasons: Coronene can now lose energy very easily through this transition whereas other transitions are barely affected.

VO2 scattering functionality in absence of localized surface plasmons is studied to illustrate their promising performance in light reflection.

Engineering methology is discussed for plasmonic nanostructure design, optimization and fabrication that results in significant enhancement of the resonance field by factors greater than KW - gold nanoparticle.

The authors call the entire process consequentially selective emission. This talk will be itemized into two main categories - materials and nanostructures. The transmittance, reflectance and absorptance response of the nanoantennas were studied as a function of their geometry length, width, thickness, gap and found to vary very strongly.

It is demonstrated that the tunable optical filter by VO2 phase transition can compensate realtime input carrier frequency shifts and pulse span variations to stabilize the output pulse.

Svetlana Alekseeva, Physics

We may ask if the predicted selective enhancement of coronene emissions is a special behavior of the very molecule.

In a typical TAR head design, a waveguide delivers light to a plasmonic aperture or antenna located at the air-bearing surface.

Schematically, the process works as follows. Barry has written a number of highly cited works including five papers with more than citations each. The development of a depletion region results in the transition of electron transport mechanism from edge-effect-induced tunneling to inhomogeneity-induced statistical variations, as the interface decreases below a critical size.Title of doctoral thesis: Plasmonic Nanospectrocopy of Individual Nanoparticles Studies of Metal-Hydrogen Interactions and Catalysis Abstract Localized surface plasmon resonance (LSPR) is the phenomenon of collective oscillation of conduction electrons in metal nanoparticles smaller than the wavelength of light used for the excitation.

Despite extensive research efforts in this area, there is still an urgent need for a systematic design method for plasmonic circuits. In this thesis, different SSP-based transmission lines, antenna feeding networks and antennas are designed and experimentally evaluated.

With their high field confinement, the SSPs do not suffer from the.

Fabrication, Simulation and Characterization of Tunable Plasmonic Nano Antennas

Spontaneous Emission Rate Enhancement Using Optical Antennas. By. Nikhil Kumar. A dissertation submitted in partial satisfaction of the. requirements for the degree of. Role of epsilon-near-zero substrates in the optical response of plasmonic antennas Radiation patterns and the resonance wavelength of a plasmonic antenna are significantly influenced by its local environment, particularly its substrate.

Here, we experimentally explore the role of dispersive substrates, such as alu- plasmonic materials. Using the center-fed plasmonic antenna as shown in Fig. 7a, Chen et al. demonstrated a bistable device by exploiting nonlinearity of the dielectric feed. The scattering resonance of center-fed plasmonic antennas can be systematically tuned by engineering the suitably defined impedance of the feed element [33].

Steve Blair

Thesis for the degree of Master of Science in Engineering Physics Towards Plasmon-Enhanced Heterogeneous Catalysis on Metal Nanoparticles Jenny Andersson.

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