Nano-Tungsten Oxide Thin Films Photoluminescence Application(a)

Photochromic properties of tungsten oxide in the optical information storage, optical control, field optical switches, optical device materials, optical information such as genetic material has broad application prospects. Using photochromic properties of tungsten oxide system has been designed, and creating a lot of practical applications of the device, such as can be used to split water WO3 / TiO2 composite solar cells while having photochromic properties of wisdom electrochromic window (PV-ECsmartwindows).

The Optical Recording And Image Storage

When using light-induced photochromic compound by different wavelengths of light irradiation intensity and color characteristics of repeated cycles, which can be made from computer memory storage device, to achieve the elimination process and memory information. Recorded information density is very large, and good fatigue resistance, fast write and erase information. Amorphous WO3 being a KrF excimer laser wavelength for the next generation of laser irradiation will turn purple 248nm wavelength longer be produced Nd-Y-Al garnet laser for laser irradiation can become another 1.06μm colorless. The study also found that the use of WO3 changes in the optical properties of the annealing process characteristics made write-once optical recording disk, the data storage density of up to a maximum 25GB. Furthermore WO3 blue under UV irradiation can be used autoradiography photosensitivity holographic recording camera. Painted on transparencies WO3 thin film layer, which is not sensitive to visible light, into a colored image in the UV irradiation. This high resolution imaging method, operator error will not occur, and the image can be repeatedly recorded and eliminated.

Optical Tunable Photonic Band Gap Crystals

Photonic crystals are artificial dielectric constant in the spatial structure of a periodic arrangement was formed. Like ordinary crystals, photonic crystals are arranged with a band structure, there may photonic bandgap or photonic band gap between the photonic band. Photonic band gap, or band gap refers to a range of frequencies of electromagnetic waves in this frequency range can not propagate in the photonic crystal in the inside, and the frequency band is located in the electromagnetic wave is able to propagate almost lossless in the photonic crystal. Width and position of the band gap and the photonic crystal has a dielectric constant ratio relationship. WO3 can be continuously varied in a wide range of light irradiation or under the action of the electric field of the dielectric constant, and therefore with the tungsten oxide in the production of polystyrene template inverse opal photonic crystal structures can be more effective regulation of the optical path.

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