Photoresponsive Transparent Conductive Metal with a Photobleaching Nose

Jamali, Mohammad Vahid; Hedayati, Mehdi Keshavarz; Mozooni, Babak; Javaherirahim, Mojtaba; Abdelaziz, Ramzy; Zillohu, Ahnaf Usman; Elbahri, Mady

doi:10.1002/adma.201102353

Cited by 19 publications

(20 citation statements)

References 25 publications

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“…Upon illumination with UV radiation, the C-O bond of the closed form breaks, and the molecule transforms to its planar merocyanine state (or 'open form/ON state'). Owing to its planar structure and extended p-conjugation, merocyanine shows a delocalized transition in absorption shifted to the visible region, which originates from the promotion of an electron from the bonding level (p) to the antibonding level (p*) under UV illumination 5 . Figure 1d shows the typical dipole and quadruple nature of the oscillating chromophores originating from the p-p* transition 18 .…”

Section: Resultsmentioning

confidence: 99%

“…No splitting was observed as the reflection minimum was indeed in the range where the imaginary part of the refractive index of the photochromic film was dominant. This result highlights the control of color and peak shifts, based on the interference and refractive index of the photochromic film, and introduces a very promising design map for controlling the optical properties of photochromic devices based on tailoring molecular photonic coupling instead of plasmonic coupling shown in our previous reports 5,6 .…”

Section: Polymermentioning

confidence: 99%

“…Photochromic molecules incorporated in a polymeric matrix compose a versatile system that has been investigated and developed for the construction of novel dynamic materials 5,6 wherein the desired properties are not only tunable but also reversible 7 . Most of the progress is solely based on the optical absorption of the molecules.…”

Section: Introductionmentioning

confidence: 99%

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Photoswitchable molecular dipole antennas with tailored coherent coupling in glassy composite

et al. 2015

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Here, we introduce the first experimental proof of coherent oscillation and coupling of photoswitchable molecules embedded randomly in a polymeric matrix and acting cooperatively upon illumination with UV light. In particular, we demonstrate the specular reflection and Brewster phenomenon alteration of photochromic molecular dipole antennas. We successfully demonstrate the concept of Brewster wavelength, which is based on the dipolar interaction between radiating dipoles and the surrounding matrix possessing a net dipole moment, as a key tool for highly localized sensing of matrix polarity. We also introduce the concept of 'tailored molecular photonic coupling' while highlighting the role of interferences for the design of optically active media by adjusting the photonic response of the medium with the real and imaginary refractive index of photoswitchable molecules in the 'ON' state. Our results enhance our fundamental understanding of coherent dipole radiation and open a new vein of research based on glassy disordered dipolar composites that act as macroscopic antenna with cooperative action; furthermore, these results have important implications for new design rules of tailored photonics.

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Section: Resultsmentioning

confidence: 99%

Section: Polymermentioning

confidence: 99%

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Photoswitchable molecular dipole antennas with tailored coherent coupling in glassy composite

et al. 2015

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“…Beside classical uniform single-layer ARCs, many structured or patterned films and surfaces have also been developed which exhibit very low reflection in a range of spectra. These designs include (but are not limited to) silica particles [11,12,13,14,15,16,17,18] (see Figure 1c,d), silica particle-polymer hybrids [19], polymer particles [20] and films [21], composites (silica-Teflon [22], spirooxazine-doped polystyrene [23,24]), vinyltrimethoxy silane films [25], SiO 2 /TiO 2 particles [26,27], and TiO 2 film [28] and AlN x [29]. Although a single-layer (wavelength) ARC is desired in laser and photodiodes [30] and solar cells [31] the narrow band of the reflection dip makes it impractical for many applications such, eyeglasses and displays.…”

Section: Conventional Antireflective Coatings (Arcs)mentioning

confidence: 99%

Antireflective Coatings: Conventional Stacking Layers and Ultrathin Plasmonic Metasurfaces, A Mini-Review

2016

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Reduction of unwanted light reflection from a surface of a substance is very essential for improvement of the performance of optical and photonic devices. Antireflective coatings (ARCs) made of single or stacking layers of dielectrics, nano/microstructures or a mixture of both are the conventional design geometry for suppression of reflection. Recent progress in theoretical nanophotonics and nanofabrication has enabled more flexibility in design and fabrication of miniaturized coatings which has in turn advanced the field of ARCs considerably. In particular, the emergence of plasmonic and metasurfaces allows for the realization of broadband and angular-insensitive ARC coatings at an order of magnitude thinner than the operational wavelengths. In this review, a short overview of the development of ARCs, with particular attention paid to the state-of-the-art plasmonic- and metasurface-based antireflective surfaces, is presented.

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“…Metal nanoparticles embedded in dielectric matrices in the form of nanocomposite films have gained significant research interest due to their multifunctional properties appropriate for various applications ranging from solar cells to targeted drug delivery [1] [2] [3] [4]. The plasmonic properties of the nanocomposite films mainly depend upon the type of nanoparticles (Au or Ag), their morphology and the dielectric constant of the embedding matrix [5] [6] [7] [8] [9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Substrate Temperature on Structural and Optical Properties of Au/SiO2 Nanocomposite Films Prepared by RF Magnetron Sputtering

Belahmar¹,

Chouiyakh²

2017

OALib

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Silica films containing gold nanoparticles were grown by magnetron radio frequency (rf) sputtering technique under various deposition conditions. The structural and optical properties of the composite films deposited at 400˚C substrate temperature were compared with those deposited at room temperature. Effect of substrate temperature of AuNPs on micro structural properties of the Au/SiO 2 nanocomposite films, such as size, dislocation density (δ), strain (ε) and lattice distortion (LD) have been investigated. The face-centered cubic crystalline structure of Au nanoparticles inclusion in the amorphous silica dielectric matrix was confirmed using X-ray diffraction. The average grain size of AuNPs has been found in the range of 0.56 -0.60 nm and 1.15 -1.23 nm at 3 × 10 −3 mbar and 2 × 10 −3 mbar argon pressure respectively. The δ, ε, LD values change inversely with the increasing of the substrate temperatures. These composites exhibit the optical features of a semiconductor with direct band gap. The band gap energy of 3.85 eV and 4.1 eV achieved for gold nanoparticles when the substrate temperatures increases from 25˚C to 400˚C. A peak wavelength of the surface plasmon resonance band absorption (SPR) characteristic of gold nanoparticle was found around 500 nm for the sample deposited at 2 × 10 −3 mbar and at 400˚C substrate temperature.

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Photoresponsive Transparent Conductive Metal with a Photobleaching Nose

Cited by 19 publications

References 25 publications

Photoswitchable molecular dipole antennas with tailored coherent coupling in glassy composite

Photoswitchable molecular dipole antennas with tailored coherent coupling in glassy composite

Antireflective Coatings: Conventional Stacking Layers and Ultrathin Plasmonic Metasurfaces, A Mini-Review

Effect of Substrate Temperature on Structural and Optical Properties of Au/SiO2 Nanocomposite Films Prepared by RF Magnetron Sputtering

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