Integrating an absorbing thin film into a resonant cavity is the most practical way to achieve perfect absorption of light at selected wavelength in mid-to-far infrared, as required target blackbody radiation or molecular fingerprints. The designed resonate and enable chosen \lambda. However, current state-of-the-art designs, still large thickness (\lambda/50) needed tuning over broad range requires changing materials. Here, we introduce new concept infrared much thinner thus really...

The design and performance of borate glass samples compositionally pre-designed to be femtosecond laser writable via laser-induced ion migration is reported in this Letter. It demonstrated that glasses modified on purpose with small amounts La2O3 Na2O can straightforwardly used produce high-index contrast (Δn) waveguides by femtosecond-laser-assisted migration. positive Δn the caused local enrichment guiding region a slope 8·10-3(mol.%)-1. value consistent numerical aperture measurements...

Abstract The active and analog tuning of the phase light by metamaterials is needed to boost switching performance photonic devices. However, demonstrations this type in pivotal visible spectral region are still scarce. Herein, we report reflected a bismuth (Bi)-based metamaterial, enabled reversible solid-liquid transition. This fabricated following lithography-free approach, consists two-dimensional assemblies polydisperse plasmonic Bi nanostructures embedded refractory transparent...

Interband Plasmonics Structural color generation driven by plasmonic nanostructures is nowadays mostly based on archetypal metals such as Au and Ag. In article number 2302130, Carlota Ruiz de Galarreta, Rosalia Serna, co-workers demonstrate how single-element, non-conventional interband materials, bismuth, can be successfully nanostructured towards the realization of both gap-plasmon metasurfaces Fabry–Pérot cavities for subtractive displays. This work demonstrates potential bismuth a...

In our study, we show that compositional engineering of the "A" site cation ABX3 perovskite structure formed by a mix organic and inorganic cations is an effective route to improve thermal stability solar cells (PSCs). this work, mixed-cation mixed-halide PSCs have been fabricated characterized with temperature, from 253 up 333 K. The active layer based on CsRbFAMAPb(IBr)3 results in more stable device compared standard MAPbI3 devices. Electrical characterization reveals decrease cell...

Abstract Sensing devices for environment, safety, healthcare, and optoelectronic applications require an accurate noninvasive monitoring of their temperature, because its variations markedly affect the overall response device. Monitoring optical temperature‐sensitive integrated photonic elements, such as microresonators or microinterferometers, is appealing solution in this context. However, achieving high‐resolution thermometry with elements unpractical costly requires lithography...

The local modification of the composition glasses by high repetition femtosecond laser irradiation is an attractive method for producing photonic devices. Recently, successful production waveguides with a refractive index contrast (Δn) above 10−2 fs-laser writing has been demonstrated in phosphate containing La2O3 and K2O modifiers. This large related to enrichment lanthanum light guiding region accompanied depletion potassium. In this work, we have studied influence initial glass on...

Abstract Random metasurfaces based on disordered phase‐change nanostructures with broadband ultraviolet–visible plasmonic properties are fantastic platforms for the development of active photonic components due to their versatility. Here optical ON–OFF switching upon nanosecond laser irradiation Bi‐based random is demonstrated profiting from solid–liquid phase transition Bi nanostructures. The fast time revealed by using single‐pulse real‐time reflectivity measurements sub‐nanosecond...

The measurement of the refractive index optical waveguides is a difficult task that involves different methods, among which those based on refracted near field determination (RNF) are likely ones providing best resolution. Still, most such methods lack spectral resolution, impedes accessing dispersion waveguide, an essential parameter for many applications. In this work, channel produced by fs‐laser induced ion‐migration in P 2 O 5 ‐La 3 ‐K O‐based glass measured imaging ellipsometry. Along...

Abstract Plasmonic metasurfaces for structural color generation are typically built using the archetypal noble metals, gold, and silver. These possess plasmonic properties in visible spectrum due to their inherent high free carrier densities. However, they much more expensive compared many other metals exhibit several nanofabrication issues such as bad surface adhesion or thermally activated inter‐diffusion. In this work, it is shown that interband materials –whose optical driven by...

Abstract Semi-transparent solar cells are the next step for photovoltaics into our daily life. Over last years, kesterite-type material has attracted a special attention to be used as an absorber in thin-film because of its low toxicity and earth abundant constituents. Here, Cu 2 ZnGeSe 4 (CZGSe) thin films grown by co-evaporation subsequent annealing at maximum temperature 480 °C or 525 onto Mo/V O 5 /FTO/glass stacks. The goal this work is investigate influence on composition, morphology,...

Fs-laser induced element redistribution (FLIER) has been a subject of intensive research in recent years. Its application to various types glasses already resulted the production efficient optical waveguides, tappers, amplifiers and lasers. Most work reported on FLIER-based waveguides refers structures produced by cross-migration alkali (Na, K) lanthanides (mostly La). The latter elements act as refractive index carrying elements. Herein, we report Ba-based, FLIER-waveguides phosphate glass...

In our study, we show that compositional engineering of the “A” site cation ABX3 perovskite structure formed by a mix organic and inorganic cations is an effective route to improve thermal stability solar cells (PSCs). this work, mixed-cation mixed-halide PSCs have been fabricated characterized with temperature, from 253 up 333 K. The active layer based on CsRbFAMAPb(IBr)3 results in more stable device compared standard MAPbI3 devices. Electrical characterization reveals decrease cell...

In article number 1800241 by Giorgio Baraldi, Rosalía Serna, Johann Toudert, and co-workers, the temperature of a self-assembled subwavelength-thin metasurface is determined optically monitoring phase reflected light in quasi-darkness conditions, which occur at specific angles incidence photon energies.

Active and analog tuning of the phase light is needed to boost switching performance photonic devices. However, demonstrations this type in pivotal visible spectral region are still scarce. Herein we report active reflected by a bismuth-based metamaterial, enabled reversible solid-liquid transition. This fabricated lithography-free approach, consists two-dimensional assemblies polydisperse plasmonic bismuth nanostructures embedded refractory transparent aluminum oxide matrix. Analog achieved...

This work reports on the production of fs-laser written waveguides based cross migration Ba and/or La against alkali in modified phosphate glass, and presence Ba-La ion competition effects.

Gap-plasmon metasurfaces based on metal-insulator-metal (MIM) nanostructures have been extensively employed over the last years, as they provide a versatile design platform for local and/or global control of amplitude, phase and polarisation light from visible to THz domain [1] . However, current research in plasmonic lacks good material building blocks, choice is fundamentally limited Ag, Au Al [2] Particularly spectrum, Ag are preferred (and only realistic) option towards development MIM...