The spatial confinement of surface plasmon polaritons is a promising route for realizing optical on-board interconnects. However, mode losses increase with the factor. To overcome this road block, we investigate propagation assisted by stimulated emission in polymer strip-loaded plasmonic waveguide doped nanocrystals. We achieve 27% length at telecom wavelength corresponding to 160 cm−1 gain coefficient. Such configuration step toward integrated amplifiers.

Waveguiding of surface plasmon polaritons by dielectric-loaded metal structures is studied in detail combining numerical simulations and leakage radiation microscopy. These types waveguides are first numerically investigated using the effective index model differential method. We analyzed systematically influence ridge width thickness waveguide on properties guided modes. In particular we confinement factor modes their associated propagation lengths. two parameters can be optimized adjusting...

The guiding properties of polymer waveguides on a thin gold film are investigated in the optical regime. details propagation studied simultaneously object and Fourier planes, providing direct measurement both real imaginary parts effective index guided mode. A fair agreement between theoretical analysis provided by differential method experimental leakage radiation microscopy data is shown. All these tools bring valuable information for designing understanding such devices.

Fiber in- and out-coupling of radiation guided by dielectric-loaded surface plasmon-polariton waveguides (DLSPPWs) is realized using intermediate tapered dielectric waveguides. The waveguide structures fabricated large-scale UV-lithography consist 1-microm-thick polymer ridges from 10-microm-wide deposited directly on a magnesium fluoride substrate to 1-microm-wide placed 50-nm-thick 100-microm-wide gold stripe. Using fiber-to-fiber transmission measurements at telecom wavelengths, the...

We investigate the guiding properties of a dielectric-loaded surface plasmon polariton waveguide on finite-width metal strip. The guided mode is characterized by leakage radiation microscopy for different strip widths. show strong attenuation widths below 1.75 μm at telecom wavelength λ=1.55 μm. estimate minimal width using numerical methods and propose an original interpretation. Good agreement with measured data achieved. determination this critical prerequisite designing miniaturized...

We express the density of states (DOS) near guided resonances plasmonic waveguides by using multiple-scattering theory. In direct analogy with case localized electronic defect in condensed matter, we demonstrate that optical DOS variations follow a lorentzian profile modes resonances. The shape gives quantitative information on (effective index, propagation length, and polarization state). numerically investigate both leaky bound (lossy) supported dielectric-loaded surface-plasmon-polariton...

Summary Using a single‐mode dielectric‐loaded surface plasmon polariton waveguide doped with quantum dots, we were able to slightly increase the propagation length of mode by stimulated emission plasmon. We analyse amplification phenomenon in visible range combining leakage radiation microscopy and coupled techniques.

Local and nonlocal models for the diffusion of photopolymers are applied to dynamic formation transmission gratings recorded in holographic polymer-dispersed liquid crystals (H-PDLCs). We retrieve main parameters H-PDLCs (refractive-index modulation coefficient) by combining a solution one-dimensional equation rigorous coupled-wave theory gratings. The method provides us with information on higher harmonics refractive profile (not only first harmonic as when classical Kogelnik is applied)....

We report on surface-plasmon propagation along coupled coplanar cavities periodically distributed in an otherwise unperturbed plasmonic crystal. show that the dispersion of particular Bloch modes can exhibit multiple energy gaps be adjusted by choosing cavity size. For resonant sizes, composite crystals composed juxtaposed support plasmon at frequencies within gap grating. In this case, we demonstrate relies a hopping mechanism.

This paper demonstrates the efficiency of differential method, a conventional grating theory, to investigate dielectric loaded surface plasmon polariton waveguides (DLSPPWs), known be potential solution for optical interconnects. The method is used obtain mode effective indices (both real and imaginary parts) profiles. results obtained with are found in good agreement those provided by index or finite elements. versatility demonstrated considering complex configurations such as trapezoidal...

The behavior of highly concentrated aqueous solutions two thermoresponsive polymers poly(N-isopropylacrylamide) (PNIPAm) and poly(N-vinylcaprolactam) (PVCL) have been investigated by terahertz time-domain spectroscopy (THz-TDS). Measurements performed for concentrations up to 20 wt %, over a frequency range from 0.3 1.5 THz temperatures 45 °C including the zone lower critical solution temperature (LCST). THz-TDS enables study water present in (i.e., free or bound polymer). From these...

Complementary metal-oxide semiconductor (CMOS) image sensor sensitivity in the near-infrared spectrum is limited by absorption length silicon. To deal with that limitation, we evaluate implementation of a polysilicon nano-grating inside pixel, at transistor gate level 90 nm standard CMOS process, through opto-electrical simulations. The studied pixel structure involves nano-grating, designed fabrication layer gate, which does not require any modifications process flow. diffraction effect...

The optimization of the experimental parameters two multiplexed holographic transmission gratings recorded in polymer-dispersed liquid crystals is investigated. Two methods are used to record holograms: simultaneous and sequential multiplexing. These processes optimized produce Bragg that have same highest possible diffraction efficiencies first order. show similar results when suitable recording used. (mainly refractive-index modulation) retrieved by use an extension rigorous coupled-wave...

This paper presents a CW raster-scanning THz imaging setup used to perform Non-Destructive Testing of Kevlar <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">™</sup> and carbon fibre samples. The uses 2.5 Quantum Cascade Laser as source. Delamination defect in sample was detected showing sensitivity laser polarization orientation. Detection break carbon/epoxy also performed.

This paper presents a CW raster-scanning THz imaging setup, used to perform Non-Destructive Testing of KevlarTMand carbon fibre samples. The setup uses 2.5 Quantum Cascade Laser as source. Delamination defect in Kevlar sample was detected showing sensitivity laser polarization orientation. Detection break carbon/epoxy also performed.

Terahertz waves can penetrate opaque materials and fingerprint spectra appear as those in infrared bands. The technique is expected to be used a new non-invasive analysis method for various materials. authors have applied terahertz time domain spectroscopy (THz-TDS) observe cracks of two types fibre-reinforced polymers (FRPs) which were Kevlar-and Carbon - FRPs reflection mode. Internal defects, or void Kevlar FRP clearly observed, cannot detected non-invasively by existing methods, such...

Bell's inequality violation experiments are becoming increasingly popular in the practical teaching of undergraduate and master's degree students. parameter S is obtained from 16 polarization correlation measurements performed on entangled photons pairs. We first report here a detailed analysis uncertainty u(S) taking into account coincidence count statistics errors polarizers' orientation. show using both computational modeling experimental measurement that actual sequence polarizer...

Two-dimensional photonic crystals composed of two orthogonal volume diffraction gratings have been photogenerated in photopolymers. When the read beam is set at Bragg angle, efficiency transmission grating strongly enhanced band edge reflection recorded material. Such a device provides operation and enhancement thin together with good wavelength selectivity. advantages could be interesting for optical signal processing.

We present in the following a quantum optics experiment appropriate for advanced undergraduate students with former experience optics. It extends classical single photon setups to time dependent domain. demonstrate self-heterodyning of heralded photons using Mach-Zehnder like interferometer where beamsplitters are replaced by two acousto-optic modulators (AOMs). The beat note is recorded over at frequency difference between RF generators driving AOMs, which makes it observable directly on...

In this paper, experimental characterization of dielectric materials from RF, mm-Wave to THz frequencies accounting for Anisotropy is presented. Broadband extraction complex permittivity values and dissipation factors various proposed. A more specific focus particularly done on a Liquid crystal Polymer (LCP) passive components BiCMOS technology with Deep-Trench-Insulator patterns (DTI). Perspectives the derivation scalable broadband models fulfilling Kramers-Kronig relationships use in...

This paper deals with the integration of metallic and dielectric nanostructured planar lenses into a pixel from silicon based CMOS image sensor, for monochromatic application at 1.064 μm. The first is Plasmonic Lens, on phase delay through nanoslits, which has been found to be hardly compatible current technology exhibits notable absorption. second Phase-Fresnel Lens integrated top pixel, it an Optical Efficiency (OE) improved by few percent angle view 50°. third one diffractive lens inside...

This paper proposes a complementary multi-physics material analysis approach based on broadband dielectric characterization and Atomic Force Microscopy. In the prospect of integrated sensor design, this was applied to polymers commonly employed by various emerging technologies.

Waveguiding by dielectric-loaded surface plasmon-polaritons (DLSPP) structures are numerically and experimentally investigated. We used the effective index model to understand influence of basic waveguide parameters such as width thickness on properties plasmon guided modes. A was fabricated studied. The indices modes supported their propagation length evaluated leakage radiation microscopy in both Fourier imaging planes. Several excitation schemes were tested including coupling diascopic or...