An electron-beam sensitive inorganic-organic hybrid SiO2TiO2 glass was synthesized for the fabrication of structures with sub-micron sized features. The sensitivity of the sol-gel material was characterized with the electron beam dosage and the optimized doses were found to cross-link the material for sub-micron structures. Due to its properties of low thermal expansion, good mechanical strength and chemical durability, the sol-gel material can be used as resistance in the dry etching process in optoelectronics fabrications. For micro-optical elements, the diffractive optical elements can be fabricated directly into the sol-gel glass without etching.
Fabrication and application of periodic grating have been spreading widely in optical systems. In this paper, we report a single step UV imprinting of sinusoidal surface grating on photosensitive hybrid sol-gel SiO2/TiO2 glasses by a holography technique utilizing a rotary mirror stage. The synthesis of the hybrid sol-gel glass film is introduced. Characteristics of the sol-gel glass including refractive index and film thickness are discussed and experimental results are presented as a function of baking temperature and UV exposure time respectively.
The hybrid sol-gel materials have been extensively studied and widely used in the fabrication of optical devices due to their attractive properties. In this work, the synthesis of the UV sensitive organic- inorganic SiO2/TiO2 sol-gel glass is presented. The effect of the fabrication parameters such as doping concentration, bake temperature and UV light exposure time on the film characteristics (thickness and refractive index) are studied. A simple way of patterning the material by UV light radiation is also introduced. These demonstrate the material possesses high potential application for the micro-optics device fabrication.
Conjugated polymers are a novel class of semiconductors that combine the optical and electronic properties of semiconductors with the processing advantages and mechanical properties of polymers. Since the first discovery of electroluminescence from conjugated polymer, PPV has been reported by JH Burroughs, et al, in 1990, the research on polymer light emitting diodes (PLEDs) has progressed rapidly. However, the number of soluble conjugated polymers with relatively high luminescence efficiency is still limited. In this paper, a recently synthesized soluble PPV derivative MBPPV is adopted to fabricate PLEDs. We studied the photoluminescence and electroluminescence properties of MBPPV and its polyblend with PVK. The energy transfer between MBPPV and PVK matrix in different blending concentration is also investigated. The emission peak and efficiency of the device ITO/MBPPV: PVK/Alq3/Al are 570nm and 1.35% respectively.
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