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This work addresses analysis of hybrid plasmonic/dielectric metamaterials operated in guided wave configurations in the near-infrared domain (» = 1.5 µm). The objective is to achieve an efficient control over the flow of the light in the waveguide using effective index variation induced by metasurface resonances. Specifically we consider a composite guiding structure made of a 2D plasmonic metasurface...
Different types of plasmonic waveguides have been recently proposed such as metal nanoparticle chains, metal films, metal/insulator/ metal (MIM) slabs, metal strips, etc. We have shown recently that the nonlinear optical phenomena are strongly pronounced at the interface of a metal and a smectic A liquid crystal (SALC) due to the nonlinear surface plasmon polariton (SPP) mixing in SALC with a large...
Efficient light management is critical for the enhancement of the efficiency of solar cells. The performance of a solar cell is determined by the efficiency of the absorption process of light via excitation of electron-hole pairs and extraction of these generated charge carriers. The absorption, in turn, has a few limiting factors: one is related to the small size and acceptance angle of the active...
The radiation pattern of a single nano-object completely encodes its multipole decomposition in amplitude, polarization, and phase. In this sense you could argue that a complete measurement of far-field information allows full resolution of the physics of a nano-object, even though converting a multipole decomposition to a near-field will require additional information on an objects size and shape...
We report our recent results of investigation of the interactions between localized plasmons in gold nanorods and excitons in J-aggregates. We were able to track an anticrossing behavior of the hybridized modes both in the extinction and in the photoluminescence spectra of this hybrid system. We identified the nonlinear optical behavior of this system by transient absorption spectroscopy. Finally...
The decades long development in shrinking footprint and improving performance of photonics integrated circuits has seemingly slowed down in recent years, posing problems in e g interconnects in data centers with their ever increasing power requirements. Thus, routes to a continued development towards smaller footprint, lower power, higher performance integrated nanophotonics will be presented and...
The influence of ordered plasmonic arrays on energy transfer from a quantum well to a quantum dot layer has been investigated. The ordered arrays are comprised of nanostructures of different geometries, including boxes, disks and rings. Despite no signature of non-radiative energy transfer in the absence of an array, an efficiency of ∼51% is observed for a ring array, though strong emission quenching...
We investigate the effect of loss and gain on transmission characteristics of Kerr-nonlinear directional couplers. We consider a symmetric coupler made of two hybrid dielectric-plasmonic slot waveguides and introduce asymmetric gain profile. We classify the resulting steady states of the nonlinear system and demonstrate that asymmetric steady states, which can only occur for an asymmetric gain profile,...
Printing plasmonic nanoparticles is of interest e.g. in the fields of large area printing for photovoltaic applications, biomedical and photonic sensor developments, as well as for digital printing of security tags for smart packaging and anti-counterfeit applications. We have studied plasmonic gold nanoparticles embedded in printable PEDOT:PSS (poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate),...
On-chip wireless optical communications among distant cores in chip multiprocessors can lead to a completely new approach to the limits of current on-chip communication. In fact, using wireless connections mitigates the problems related to the design and the fabrication of hugely complex switching fabrics, where long paths suffer of crosstalk and loss issues. We investigate the possibility of integrating...
Silicon cluster superlattices, which have been generated by direct deposition of a silicon cluster beam with a monodisperse size distribution, give a just solution to bring forth new functional nanomaterials consistent with a sustainable society. Silicon clusters correctively form a unclosed-packed body centered cubic (bcc) superlattice structure with a lattice constant of 2.134±0.002 nm, retaining...
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