2.5D photonic nanostructures with narrow‐band diffraction characteristics have a vast range of potential applications in information storage, tunable lasers, optical filters, and biosensors. However, fabrication devices over large areas remains expertise‐dependent, inaccurate, high‐cost, limiting their widespread use practical consumer products. Here, area printing quasi holograms is demonstrated the visible spectrum. These holographic surface‐relief gratings are hexagonally packed lateral...

We present a novel method to promote intersystem crossing (ISC) and triplet state formation in boron dipyrromethenes (BODIPYs) via asymmetrical substitution within the chromophore. This approach reduces synthetic complexity compared...

Inkjet printing and patterning strategies have been developed for fabrication of hybrid holographic sensors using zeolite nanocrystals on glass-supported photopolymers. The flexibility the proposed techniques was demonstrated by characterization two types sensors. first type, which is a reversible sensor, based transmission hologram recorded in hydrophobic MFI-type doped layer with high sensitivity toward alcohols. In this type sensor volume polymer achieved recording; pattern periodicity...

This paper explores the effects of humidity on gratings recorded in a polyvinylalcohol–acrylamide photopolymer medium. Investigation behaviour transmission exposed to high is significant interest for two reasons, firstly because grating's sensitivity can be exploited development irreversible indicators, secondly too much limit use these materials applications where an environmentally stable hologram needed. In this we focus effect properties volume phase PVA/AA layers temperature range 8–24...

The aim of this paper is to discuss the benefits as well limitations utilizing photopolymer materials in design holograms that are responsive changes their environment, such concentration a specific substance, temperature, and pressure. Three different case studies presented, including both surface volume phase holograms, order demonstrate flexibility approach holographic photopolymers for sensors interactive optical devices. First, functionalized relief hologram demonstrated operate an...

In recent years, functionalized photopolymer systems capable of holographic recording are in great demand due to their potential use the development sensors. This work presents a newly developed N-isopropylacrylamide (NIPA)-based for reflection and transmission modes. The optimized composition material is found reach refractive index modulation up 5×10-3 1.6×10-3 after mode, respectively. addition fulfilling requirements materials, NIPA-based sensitive temperature has lower toxicity than...

Abstract Advancements in hybrid sol‐gel technology have provided a new class of holographic materials as photopolymerizable glasses. Recently, number photosensitive glass compositions with high dynamic range and spatial resolution been reported their excellent capability for volume holography has demonstrated. Nevertheless, challenges remain, particularly relation to the processing time environmental stability these materials, that strongly affect performance durability fabricated holograms....

Novel BODIPY forming triplet excited states via the SOCT-ISC process was used for polymerization of methacrylate monomers inside a hybrid sol–gel material. Holographic recording diffractive structures with high efficiency demonstrated.

Continual improvements to holographic recording materials make the development of volume optical elements increasingly more attainable for applications where highly efficient, lightweight diffractive can replace conventional optics. A fast-curing, water resistant photosensitive sol–gel capable has recently drawn attention its extreme environmental and physical robustness, in particular water/moisture scratch resistance. However, date, refractive index modulation been limited. While...

Holographic sensors have significant potential in various applications ranging from vitro diagnostics to optical security. They are capable of providing fast, real-time, reversible or irreversible, visual colorimetric readouts. The main challenge the development holographic is improve their selectivity by functionalizing recording material and achieve a response specific analyte. This should be permeable analyte its properties change under exposure work explores humidity temperature volume...

Photopolymerisable glasses are holographic recording materials which provide good capability, improved dimensional stability, and negligible shrinkage. Recently, a novel photopolymerisable hybrid sol-gel (PHSG) for of volume gratings has been reported. The PHSG significantly gelation time high water resistance, both make it an attractive material mass production optical elements (HOEs) with no sensitivity to ambient humidity. In order achieve full control over the performance further improve...

Volume reflection hologram-based sensors are designed to visibly change colour in response a target stressor or analyte. However, holograms fabricated thick photopolymer films highly angularly selective, making these challenging view and interpret by non-experts. Here, the use of speckle holography improve visibility is presented. A novel recording approach combining techniques with Denisyuk geometry described. The recorded grating operates as series multiplexed gratings range spatial...

Recently, functionalised photopolymer has emerged as a versatile recording material in the field of optical holography due to its novel characteristics and potential use development holographic based sensors, elements. This work describes temperature response newly developed photopolymer, containing monomer N-isopropylacrylamide (NIPA) which under photopolymerisation forms sensitive polymer - Poly(N-isopropylacrylamide) (PNIPA). The photonic sensor was by volume phase transmission gratings...

Holographic multiplexing techniques enhance functionality and information storage by leveraging the inherent selectivity of holograms. This is crucial for advancing holographic sensors, which excel in simultaneously detecting multiple parameters from a single input signal. study explores potential recent photopolymerisable hybrid sol-gel (PHSG) material application Space sensing systems through investigation its angular capabilities. For first time, to best our knowledge, we report...

The progress of space based scientific research leads to an increasing demand for more efficient and less bulky instruments. Conventional refractive elements make up a critical part many optical instruments launched into space; however, they can be heavy. Holographic are alternative replace the conventional as lightweight miniaturized. Current materials typically used volume holographic not robust enough use in environment. Recently promising photopolymerisable glass has been developed using...

Wounds that fail to heal impact the quality of life 2.5 % total population. The costs chronic wound care will reach $15–22 billion by 2024. These alarming statistics reveal financial strain for both medical industry and society. A solution can be found in compact accessible sensors offer real-time analysis site, facilitating continuous monitoring immediate treatment, if required. Benefits these include reduction cost extend healthcare remote areas. progression a site closely monitored with...

The acoustic output of clinical therapeutic ultrasound equipment requires regular quality assurance (QA) testing to ensure the safety and efficacy treatment that any potentially harmful deviations from expected power density are detected as soon possible. A hologram, consisting a reflection grating fabricated in an acrylate photopolymer film, has been developed produce immediate, visible, permanent change color reconstructed hologram red green response incident energy. influence insonation...

A series of new heavy-atom-free photosensitizers using 2,6-diethoxycarbonyl-BODIPY was designed and synthesized. Photoinduced electron transfer between the BODIPY meso-aryl subunits followed by formation triplet excited states via spin-orbit charge intersystem crossing (SOCT-ISC) studied steady-state ultrafast pump-probe transient optical spectroscopy. Highly efficient photosensitization observed for dyads bearing pyrene anthracene substituents, which exhibited singlet oxygen generation with...

Heavy-atom-free diethoxycarbonyl-BODIPY undergo SOCT-ISC and enable photopolymerization of acrylamide monomers inside a cellulose acetate matrix that was applied for holographic recording diffractive structures with high efficiency.

Recently, a new class of holographic recording materials based on photopolymerisable glass has been developed using the sol-gel technology. Photopolymerisable have demonstrated excellent capability for volume holography due to their good optical quality and high dynamic range. Other advantages include thermal chemical stability, dimensional stability robustness because rigid matrix. However, preparation period non-tacky, dry layers suitable depends both composition sample thickness, varies...