High-performance photorefractive organic glass with near-infrared sensitivity
نویسندگان
چکیده
A high-performance organic glass mixture comprised of two dicyanomethylenedihydrofuran derivatives is presented. A pronounced two-beam coupling effect was observed at a wavelength of 830 nm in an unsensitized composition. Sensitization with ~2,4,7-trinitro-9fluorenylidene!malononitrile ~TNFM! led to a significant increase in the two-beam coupling gain coefficient, reaching a net value of ;370 cm at an electric field of 45 V/mm at 1% TNFM, and resulted in an improvement in photorefractive speed. © 2003 American Institute of Physics. @DOI: 10.1063/1.1577214#
منابع مشابه
Transmission near-field scanning microscope for infrared chemical imaging
We report transmission infrared near-field scanning microscopy ~IR-NSOM! imaging of chemically amplified photoresist polymers patterned by ultraviolet exposure. Chemical specificity was attained using infrared wavelengths tuned to the 3 mm OH stretch absorption band of the polymer, a band sensitive to the chemical changes characteristic of the lithographic photochemical process of this material...
متن کاملOn-chip sensing of volatile organic compounds in water by hybrid polymer and silicon photonic-crystal slot-waveguide devices
Lab-on-chip integrated infrared spectroscopy and sensing with hybrid polymer and silicon photonic crystal slot waveguides is demonstrated for the specific and selective identification of volatile organic compounds, xylene and toluene, in water. A 300 micron long photonic crystal slot waveguide was demonstrated that enabled the detection of 100ppb xylene in water by near-infrared absorption sign...
متن کاملHigh-performance photorefractive organic glasses: understanding mechanisms and limitations
Since the first observation of the photorefractive (PR) effect in polymers, extensive efforts have been directed toward understanding the physics of the PR process in these systems, as well as optimizing polymer composites and glasses for various applications. Despite remarkable progress both in elucidating the mechanisms and processes contributing to the PR effect and in designing organic mate...
متن کاملEnhanced near-infrared electrochromism in triphenylamine-based aramids bearing phenothiazine redox centers†
A series of organosoluble polyamides based on N-phenothiazinylphenyl redox units showing anodically electrochromic characteristics both in the near-infrared (NIR) and visible light regions were prepared from the phosphorylation polyamidation reactions of a newly synthesized diamine monomer, 4,40-diamino-40 0-N-phenothiazinyltriphenylamine, with various dicarboxylic acids. These polymers were re...
متن کاملInvestigation of silver-only and silver / TOPAS ® coated hollow glass waveguides for visible and NIR laser delivery
Hollow Glass Waveguides (HGWs) present a viable option for the low-loss transmission of radiation over a broad range spanning from visible to far-infrared wavelengths. Cyclic Olefin Copolymer (COC), a commercially available polymer known as TOPAS ® , is chosen for this study due to its exceptionally low absorption losses throughout the spectrum, particularly in the visible and near-infrared (NI...
متن کامل