Reflection is a natural phenomenon that occurs when light passes the interface between materials with different refractive index. In many applications, such as solar cells or photodetectors, reflection an unwanted loss process. Many ways to reduce from substrate have been investigated so far, including dielectric interference coatings, surface texturing, adiabatic index matching and scattering plasmonic nanoparticles. Here we present entirely new concept suppresses of silicon over broad...

We report on the design, fabrication, and measurement of ultrathin film a-Si:H solar cells with nanostructured plasmonic back contacts, which demonstrate enhanced short circuit current densities compared to having flat or randomly textured contacts.The primary photocurrent enhancement occurs in spectral range from 550 nm 800 nm.We use angle-resolved spectroscopy confirm that absorption is due coupling guided modes supported by cell.Full-field electromagnetic simulation active layer agrees...

Plasmonic nanostructures have been recently investigated as a possible way to improve absorption of light in solar cells. The strong interaction small metal with allows control over the propagation at nanoscale and thus design ultrathin cells which is trapped active layer efficiently absorbed. In this paper we review some our recent work field plasmonics for improved We two ways integrating nanoparticles cell. First, Ag that improves standard antireflection coating used crystalline amorphous...

Nanophotonic structures have attracted attention for light trapping in solar cells with the potential to manage and direct absorption on nanoscale. While both randomly textured nanophotonic been investigated, relationship between photocurrent spatial correlations of random or designed surfaces has unclear. Here we systematically design pseudorandom arrays nanostructures based their power spectral density, correlate frequencies measured simulated photocurrent. The integrated cell consists a...

Light sources based on reliable and energy-efficient light-emitting diodes (LEDs) are instrumental in the development of solid-state lighting (SSL). Most research efforts SSL have focused improving both intrinsic quantum efficiency (QE) stability light emitters. For this reason, it is broadly accepted that with advent highly efficient (QE close to 1) stable emitters, fundamental phase coming an end. In study, we demonstrate a very large improvement emission (above 70-fold directional...

The impact of controlled nanopatterning on the Ag back contact an n-i-p a-Si:H solar cell was investigated experimentally and through electromagnetic simulation. Compared to a similar reference with flat contact, we demonstrate efficiency increase from 4.5% 6.2%, 26% in short circuit current density. Spectral response measurements show majority improvement between 600 800 nm, no reduction photocurrent at wavelengths shorter than nm. Optimization pattern aspect ratio using simulation predicts...

We present indications of thermalization and cooling quasiparticles, a precursor for quantum condensation, in plasmonic nanoparticle array. investigate periodic array metallic nanorods covered by polymer layer doped with an organic dye at room temperature. Surface lattice resonances the array--hybridized plasmonic-photonic modes--couple strongly to excitons dye, bosonic quasiparticles which we call plasmon-exciton polaritons (PEPs) are formed. By increasing PEP density through optical...

Directional emission of colour-converted light-emitting diodes (LEDs) can be enhanced and accurately controlled using hexagonal arrays aluminum nanoparticles, which sustain plasmonic–photonic modes. Left: scanning electron micrograph a nanoimprinted array with lattice constant 375 nm. Right: Fourier image the directional device featuring such an array.

We study the hybridized plasmonic-photonic modes supported by two-dimensional arrays of metallic nanoparticles coupled to light-emitting optical waveguides.Localized surface plasmon polaritons in can couple guided underlying waveguide, forming quasi-guided hybrid modes, or diffracted orders plane array, lattice resonances.We consider three kinds samples: one sustains only, another resonances and a third sample both modes.This constitutes first demonstration simultaneous coupling localized...

We demonstrate the generation of light in an optical waveguide strongly coupled to a periodic array metallic nanoantennas. This coupling gives rise hybrid waveguide-plasmon polaritons (WPPs), which undergo transmutation from plasmon mode and vice versa as eigenfrequency detuning bare states transits through zero. Near zero detuning, structure is nearly transparent far-field but sustains strong local field enhancements inside waveguide. Consequently, light-emitting WPPs are enhanced at...

Abstract Releasing the potential of advanced material properties by controlled structuring materials on sub-100-nm length scales for applications such as integrated circuits, nano-photonics, (bio-)sensors, lasers, optical security, etc. requires new technology to fabricate nano-patterns large areas (from cm 2 200 mm up display sizes) in a cost-effective manner. Conventional high-end lithography stepper/scanners is highly capital intensive and not flexible towards substrate types. Nanoimprint...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation S. R. K. Rodriguez, G. Lozano, M. A. Verschuuren, Gomes, Lambert, B. De Geyter, Hassinen, D. Van Thourhout, Z. Hens, J. Gómez Rivas; Quantum rod emission coupled to plasmonic lattice resonances: A collective directional source of polarized light. Appl. Phys. Lett. 12 March 2012; 100 (11): 111103....

We demonstrate an effective light trapping geometry for thin-film solar cells that is composed of dielectric scattering nanocavities at the interface between metal back contact and semiconductor absorber layer. The based on resonant Mie scattering. It avoids Ohmic losses found in metallic (plasmonic) nanopatterns, scatterers are well compatible with nearly all types cells, including produced using high temperature processes. external quantum efficiency a-Si:H grown top a nanopatterned...

We demonstrate that the coupling between light emitters in extended polymer layers and modes supported by arrays of plasmonic particles can be selectively enhanced accurate positioning regions where electric field intensity a given mode is maximized. The enhancement, which we measure to reach up 70%, due improved spatial overlap optical emitters. This improvement leads modification emission spectrum luminous efficacy sample.

A generic process has been developed to grow nearly defect free arrays of (heterostructured) InP and GaP nanowires. Soft nanoimprint lithography used pattern gold particle on full 2 inch substrates. After lift-off organic residues remain the surface, which induce growth additional undesired We show that cleaning samples before with piranha solution in combination a thermal anneal at 550 C for 700 results uniform nanowire 1% variation length, without extra Our chemical procedure is applicable...

We demonstrate effective mode coupling by light scattering from periodic Ag nanoparticle arrays printed onto a completed thin-film a-Si:H solar cell. Current-voltage measurements show photocurrent enhancement of 10% compared to flat reference cell with standard antireflection coating. External quantum efficiency for the nanopatterned cells clear infrared peaks, corresponding discrete waveguide modes in layer. The data are good agreement three-dimensional finite element simulations, which...

Abstract Using soft-imprint nanolithography, we demonstrate large-area application of engineered two-dimensional polarization-independent networks silver nanowires as transparent conducting electrodes. These have high optical transmittance, low electrical sheet resistance and at the same time function a photonic light-trapping structure enhancing absorption in absorber layer thin-film solar cells. We study influence nanowire width pitch on network transmittance improved performance compared...

A system comprising an aluminum nanoantenna array on top of a luminescent colloidal quantum dot waveguide and covered by thermotropic liquid crystal (LC) is introduced. By heating the LC above its critical temperature, we demonstrate that concomitant refractive index change modifies hybrid plasmonic–photonic resonances in system. This enables active control spectrum directionality narrow-band (∼6 nm) enhancement photoluminescence metallic nanoantennas.

We propose aluminum nanopyramids (ANPs) as magnetoelectric optical antennas to tailor the forward versus backward luminescence spectrum. present light extinction and emission experiments for an ANP array wherein localized resonances couple in-plane diffracted orders. This coupling leads spectrally sharp collective resonances. Luminescent molecules drive both resonances, we experimentally demonstrate unconventional Through analytical calculations, show that magnetic, magnetoelectric,...

We present a direct experimental investigation of the thermal ordering in an artificial analogue asymmetric two-dimensional Ising system composed rectangular array nano-fabricated magnetostatically interacting islands. During fabrication and below critical thickness magnetic material islands are thermally fluctuating thus is able to explore its phase space. Above freeze-in resulting arrested thermalized state for array. Determining we demonstrate genuine which can be analyzed context nearest...