NIR light-directing self-organized 3D photonic superstructures loaded with anisotropic plasmonic hybrid nanorods

Wang, Ling; Gutiérrez-Cuevas, Karla G.; Bisoyi, Hari Krishna; Xiang, Jie; Singh, Gautam; Zola, Rafael S.; Kumar, Satyendra; Lavrentovich, Oleg D.; Urbas, Augustine; Li, Quan

doi:10.1039/c5cc06146f

Cited by 95 publications

(50 citation statements)

References 30 publications

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“…In addition, by varying the type, shape, and size of metallic NPs used, the bandwidth of spectral response could be modified from the visible to cover ultraviolet or near infrared. It is noteworthy that light-induced order-changing phase transition of LCs has been achieved in various liquid crystalline nanocomposites doped with gold nanoparticles, graphene, or carbon nanotubes, where the 'photothermal effect' of nanomaterials upon light irradiations play an important role in changing the orientational order of LC host [98][99][100][101][102][103][104][105]. All these nanomaterials possess superior optical absorption in a wide wavelength range upon light irradiations.…”

Section: Nano-dispersed Nematic Liquid Crystalsmentioning

confidence: 99%

Self-activating liquid crystal devices for smart laser protection

Wang

2016

Liquid Crystals

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Lasers are now extensively used in a multitude of optical devices and photonic systems spanning from sensing, communication, entertainment, medical surgery to military applications. Direct accidental or intentional exposures to high power lasers may lead to severe temporary or even permanent harm of human eye, skin, or optical sensors. The effective laser protection and shielding are currently not only a subject of scientific research but also a potential public safety issue, therefore there is an urgent need to develop the intelligent laser protection devices for keeping human eyes, optical sensors, and other sensitive components from these unintended or intended damages by laser radiations without warning. Self-activating liquid crystal devices undoubtedly represent such an elegant example because they could be autonomously activated to block or attenuate the lasers when the laser intensity is higher than a maximum permissible exposure value. This review is devoted to summarising the up-to-date significant advances of selfactivating liquid crystal devices for potential smart laser protection, including twist-aligned nematic liquid crystal devices, liquid crystal cored waveguide fibre arrays, and photovoltaic/ pyroelectric-hybridised liquid crystal devices. Finally, the review concludes with the perspectives and challenges for the future development of self-activating liquid crystal devices. It is anticipated that this glimpse and further endeavours in the emerging field will help the researchers from different backgrounds towards the fabrication of highly efficient laser protection devices, their real-world widespread applications and beyond. ARTICLE HISTORY

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Section: Nano-dispersed Nematic Liquid Crystalsmentioning

confidence: 99%

Self-activating liquid crystal devices for smart laser protection

Wang

2016

Liquid Crystals

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“…Inspired by the movement of biomolecular motors, chemically powered micro/nanomotors have been extensively studied and designed to perform different tasks in the past decade . Alternatively, fuel‐free synthetic motors propelled by magnetic field, electrical field, ultrasonic wave, heat gradient, and light, have been recently studied. Compared to the limitation caused by using chemical fuels, such as hydrogen peroxide, such external physical stimuli can provide remote interventions on the “on/off” states, the speed and direction of movement as well as the position in a controlled manner.…”

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confidence: 99%

Superfast Near‐Infrared Light‐Driven Polymer Multilayer Rockets

Gao

et al. 2015

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A gold nanoshell‐functionalized polymer multilayer nanorocket performs self‐propulsion upon the irradiation with NIR light in the absence of chemical fuel. Theoretical simulations reveal that the NIR light‐triggered self‐thermophoresis drives the propulsion of the nanorocket. The nanorocket also displays efficient NIR light‐triggered propulsion in biofluids and thus holds considerable promise for various potential biomedical applications.

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“…[279,280] Similar to the CLC phases, BPs may also be used as diffraction gratings. BPs are observed in highly chiral LCs and are basically composed of double twist cylinders that form a defect lattice and arrange themselves in symmetric structures, such as simple cubic (BPII) or body-centered cubic (BPI) lattices.…”

Section: Blue Phase Lc Gratingsmentioning

confidence: 99%

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

et al. 2018

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the duality consolidation, the idea of controlling light and how it interacts with matter has always been an exciting topic. Visible light, as we perceive it, is a small portion of the electromagnetic spectrum composed of mutually perpendicular oscillating electric and magnetic fields that propagate through space and presents wave-like and particle-like behavior. Since the elements comprising matter possess dynamic electron clouds, the electromagnetic nature of light prompts different responses when it interacts with different materials, depending on its intensity, frequency, the arrangement of molecules, and so on. Whenever light interacts with matter, it might be absorbed, re-emitted, scattered, or transmitted. Although these effects are well known, the combination of them with new, innovative materials pushes optics forward. In fact, advances in optics have often occurred through the development of materials with improved optical properties, thus creating remarkable applications that tremendously influence our daily lives. These exciting applications include image processing and recording, lasing, data storage, display devices, detector systems, propulsion systems, and optical tweezers, which have enabled remote micromanipulation of colloidal particles and promising applications in various biomedical and biological applications. [1][2][3] There is, however, one component that stands out: the diffraction grating. It is generally regarded as one of the most important devices in the development of several fields of science. [4] Such importance comes from the fact that a diffraction grating is a device with a periodic structure capable of changing the propagation and splitting the spectrum The ability to control light direction with tailored precision via facile means is long-desired in science and industry. With the advances in optics, a periodic structure called diffraction grating gains prominence and renders a more flexible control over light propagation when compared to prisms. Today, diffraction gratings are common components in wavelength division multiplexing devices, monochromators, lasers, spectrometers, media storage, beam steering, and many other applications. Next-generation optical devices, however, demand nonmechanical, full and remote control, besides generating higher than 1D diffraction patterns with as few optical elements as possible. Liquid crystals (LCs) are great candidates for light control since they can form various patterns under different stimuli, including periodic structures capable of behaving as diffraction gratings. The characteristics of such gratings depend on several physical properties of the LCs such as film thickness, periodicity, and molecular orientation, all resulting from the internal constraints of the sample, and all of these are easily controllable. In this review, the authors summarize the research and development on stimuli-controllable diffraction gratings and beam steering using LCs as the active optical materials. Dynamic gratings fabricated by applying external f...

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NIR light-directing self-organized 3D photonic superstructures loaded with anisotropic plasmonic hybrid nanorods

Cited by 95 publications

References 30 publications

Self-activating liquid crystal devices for smart laser protection

Self-activating liquid crystal devices for smart laser protection

Superfast Near‐Infrared Light‐Driven Polymer Multilayer Rockets

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

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