Au-plasmon-assisted holographic azopolymer nano-cavity for wideband and low-threshold distributed feedback lasing.

Optically pumped polymer nanolasers drive the development of integrated optoelectronic devices. Introduction of surface plasmon into nanolasers can effectively enhance the local electromagnetic field in the optical pumping processes. However, significant quenching effects on organic fluorescence emissions bring the challenge in high-efficient lasing from the distributed feedback (DFB) nano-device loaded with noble metal particles.

Voltage-controlled holography mediated with the metal ions sandwiched in TiO/FTO electrodes.

Combining multiple physical fields to achieve on-demand signal conversion is essential. Optical manipulation based on holography, especially electric field-driven holography, can promote efficient information processing. However, there is a lack of a platform that can effectively connect optical recording/reading with electric field.

Orthogonal hologram memory extending from visible to UV mediated with TaO/TiO:Ag heterojunctions.

The photon-energy conversion covering the full spectral wave band is crucial for detecting and storing information. Schottky junctions in nanoscale such as TiO:Ag enable multicolor photochromism and information storage in the visible region. However, the photoelectrons from the UV-excited semiconductor cause the loss of information.

Bi-path color tunable plasmonic micro-nano hybrid structures for encrypted printing.

Colored information is crucial for humans to perceive the world. Plasmonic spectra modulation can serve as an effective means to create different colors. Although several solutions for plasmonic color-printing have been proposed, further information encryption has not received any attention.

Semi-spontaneous temporal evolution of relief/fluorescence hybrid gratings for holographic encryption.

Holographic systems can reconstruct the entire wavefront of light which are developed as an excellent platform of information encryption. Although holography has utilized multiple modulation dimensions, little attention is given to its combination with fluorescence emitting. Herein, we propose a semi-spontaneous time-dependent encryption strategy of hybrid holographic fringes with surface relief and fluorescent emission mediated by a plasmonic polymer doped with fluorescent dyes.

Exciting-frequency-adaptive amplitude/phase hybrid holographic inscription in plasmonic polymers.

Plasmonic holography is generally regarded as an effective technology for 3D display that meets the requirements of the human visual system. However, low readout stability and large cross talk in the frequency field during a plasmonic photo-dissolution reaction set a huge obstacle for application of color holography. Herein, we propose a new, to the best of our knowledge, route toward producing exciting frequency sensitive holographic-inscription based on plasmonic nano-Ag adaptive growth.

Dual-path inscription of plasmonic nano-Ag moiré fringes.

Construction of moiré surface patterns has attracted considerable attention due to the fascinating function of photoelectric manipulation. Holographic inscription offers superposition of two or more sinusoidal gratings to form moiré structures. However, the current material platforms primarily depend on a single process of photoinduced physical property change to build up multicomponent gratings.

Plasmonic Optoelectronic Memristor Enabling Fully Light-Modulated Synaptic Plasticity for Neuromorphic Vision.

Exploration of optoelectronic memristors with the capability to combine sensing and processing functions is required to promote development of efficient neuromorphic vision. In this work, the authors develop a plasmonic optoelectronic memristor that relies on the effects of localized surface plasmon resonance (LSPR) and optical excitation in an Ag-TiO nanocomposite film. Fully light-induced synaptic plasticity (e.

Adjustable color response during plasmon resonance by monochromatic light irradiation.

A combination of plasmonic nanoparticles with a semiconductor is a feasible approach to realize multiple color exhibitions. The phenomenon is based on plasmon-driven charge separation between electrons and metal ions, but suitable only for light excitation with different wavelengths. Here, we introduce a color-adjustable method under monochromatic light irradiation.

Plasmon-driven light harvesting in poly(vinyl alcohol) films for precise surface topography modulation.

Efficient light harvesting is essential for advanced photonic devices. Complex micro/nano surface relief structures can be produced via light-triggered mechanical movement, but limited in organic active molecular units. In this Letter, we propose to embed noble-metal particles into light-inactive polyvinyl alcohol matrix to construct a light harvesting system driven by plasmon for inscription of surface relief gratings.

Enhancing hologram memory via deposition of plasmonic nanocubes on orderly mesoporous titania.

Hologram is regarded as a key platform for large-volume data storage and information encryption. Diversity of plasmonic nanostructures makes it being a kind of vibrant hologram memory media. However, recording of amplitude, phase and polarization of light is restricted by difficulty to obtain anisotropic morphology of metal particles.

Bidirectional Photochromism via Anchoring of Carbon Dots to TiO Porous Films.

Photochromic materials present photocontrollable properties, which is of great interest for potential applications including high-density storage and optical displays. Herein, we demonstrate a promising pathway toward smart photochromic nanocomposite exploration by anchoring of carbon dots (CDs) to titanium dioxide (TiO) porous films. This study reveals that the color of the CDs/TiO film obtained by dropping anchoring becomes darker and that obtained by immersion anchoring becomes lighter, both under blue light irradiation.

Bi-photonic reduction of anisotropic Ag nanoparticles for color-tunable hologram reconstruction.

Efficient optical phase modulation is essential for information processing. The polarization response of metallic nanoparticles plays a key role in the formation of vector hologram. Commonly, Ag nanoparticles reduced by incoherent UV lamp tend to grow in isotropy, which is unsuitable for the formation of polarization hologram and the resultant multicolor holograms recording-readout in polarization channels.

Graphene-oxide/TiO nanocomposite films with electron-donors for multicolor holography.

Graphene oxide (GO) with an ideal two-dimensional structure, presents outstanding optical, electric, and mechanical properties which draws great attention in advanced information devices. Recently, GO-based films were found to show photochromic behavior, especially for the TiO involved system which has potential data processing capability, such as storing holograms. However, expanding spectral response range and increasing exposure sensitivity are still challenges for such a film, due to the limited photo-quantum efficiency in reduction reaction.

Fluorescent Holographic Fringes with a Surface Relief Structure Based on Merocyanine Aggregation Driven by Blue-violet Laser.

Stability and integration are the goals for developing photonic devices. Spirooxazines have the property of photoinduced merocyanine-aggregation in polymer matrix, which can be applied to fluorescence emission and stable information storage. Although visible light coherent radiation with UV-assist has been used to achieve polarization-modulated holographic memory in spirooxazine doped PMMA films, the complexity of optical systems is increased and the aggregation ability of merocyanine is decreased.

Visible laser-assisted reduction of plasmonic Ag nanoparticles with narrow-band optical absorption for colored holographic reconstruction.

Noble metal plasmonic resonance has been utilized in optical data storage widely for its excellent photo-transformation efficiency. TiO nanoporous films deposited with Ag nanoparticles present outstanding polarization-response and color-modulation ability. However, the low exposure-sensitivity at single wavelength inhibits their application in optical information processing, which is urgent to be improved by innovative methods.

Nonvolatile plasmonic holographic memory based on photo-driven ion migration.

Stability of data storage is essential for optical information processing. TiO nanoporous films loaded with small-sized Ag nanoparticles thus attracted much attention due to their fast and polarization-sensitive photochemical response, which is able to realize optical phase modulation and high-density optical memory. However, little attention was given to the modulation of the silver ion migration, which plays a key role in anti-erasure of the recorded hologram.

Selective photo-oxidation induced bi-periodic plasmonic structures for high-density data storage.

Stable and controllable optical memory is necessary for the development of current information technology. In this context, Ag/TiO films have received much attention for their photosensitivity in wavelength and polarization, which can be applied to high-density optical storage. Here, we carried out dual-wavelength holographic recording using 403.

Blu-ray-sensitive localized surface plasmon resonance for high-density optical memory.

Tunable spectrum-response is desired for efficient photo-energy transformation. Blu-ray (~405 nm) and polarization sensitive Ag/TiO nanocomposite films are thus fascinating in application of fast-response and high-density optical memory device. The Ag/TiO film has the ability of replicating hologram based on optical coherence by laser-stimulated dissolution of Ag nanoparticles (NPs).

Biphotonic holographic grating recordings for different polarization configurations in spirooxazine-doped polymers.

Spirooxazine-doped polymers exhibit a fast photochromism response and high polarization sensitivity after irradiation in the short-wavelength range. Based on such properties, holographic grating recordings accompanying a linearly polarized blue-violet beam (405 nm) in a photochromic film were performed by two coherent green beams (532 nm) for s-s, p-p, s-p left-to-right circular polarization and right-to-right circular polarization. Under the biphotonic action of 405 and 532 nm, the temporal evolution of the diffraction efficiency was strongly dependent on the polarization configuration of the recording beams.

Photoinduced anisotropy and polarization holographic gratings formed in Ag/TiO2 nanocomposite films.

Formation of anisotropy and polarization holographic gratings (s-s, p-p, and s-p) in Ag/TiO2 nanocomposite films were investigated using Nd:YAG lasers (532 nm) as pumping and writing source, respectively. The observations can be well explained by the anisotropic photodissolution of Ag nanoparticles, the photomobility and reduction of Ag+ ions, and the light scattering induced by Ag nanoparticles. Taking these effects into account, a phenomenological model based on simultaneous formation of the absorption grating and the two coupling phase gratings is proposed and found to be in good agreement with the measurements.