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首页> 外文会议>Nanobiosystems: Processing, characterization, and applications VI >Grating formation in bi-layered DNA-complex devices: Application to thin-film tunable dye lasers
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Grating formation in bi-layered DNA-complex devices: Application to thin-film tunable dye lasers

机译：双层DNA复合设备中的光栅形成：应用于薄膜可调染料激光器

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Interaction of some organic dyes with DNA induces fluorescence enhancement through intercalation or groove binding, stimulating the development of compact tunable thin-film dye lasers. We have demonstrated amplified spontaneous emission (ASE), laser emission and its tuning via distributed feedback (DFB) with a dynamic grating formed in DNA-surfactant complexes doped with cyanine or hemicyanine dyes. The formation of semi-persistent (or quasi-dynamic) grating is more preferable in order to realize stable and easily tunable laser sources, so we fabricated bi-layered devices composed of a DNA-CTMA layer doped with pyridine 1 (Py1) and an PMMA layer including an azo dye, Disperse Red 1 (DR1). Under simultaneous excitation of the azo layer with interfering two beams for grating formation and the emission layer with another beam as pumping, we observed laser emission from the device. The oscillation wavelength was controlled by varying the incident beam angles allowing the fast tuning suitable to applications. Furthermore, monolithic DNA device having two functions of lasing and grating formation would be more promising. DNA-CTMA complex had been considered to be a poor matrix for grating inscription, but we found that doping of an azo-carbazole compound made it possible to inscribe gratings with relatively high diffraction efficiency and with fast response which could be applicable to monolithic tunable laser system.
机译：一些有机染料与DNA的相互作用通过插层或凹槽结合诱导荧光增强，从而刺激了紧凑型可调谐薄膜染料激光器的发展。我们已经证明了使用分布在花青或半花菁染料中的DNA表面活性剂络合物中形成的动态光栅，可以通过分布反馈（DFB）来放大自发发射（ASE），激光发射及其调谐。为了实现稳定且易于调谐的激光源，更优选半永久性（或准动态）光栅的形成，因此我们制造了由掺有吡啶1（Py1）和吡啶1的DNA-CTMA层组成的双层器件。包括偶氮染料Disperse Red 1（DR1）的PMMA层。在同时激发偶氮层并干涉两束光束以形成光栅，而发射层又激发另一束光的情况下，我们观察到了该装置的激光发射。通过改变入射光束角度来控制振荡波长，从而使快速调谐适合于应用。此外，具有激光和光栅形成两种功能的整体式DNA装置将更有希望。 DNA-CTMA复合物被认为是光栅刻写的较差基质，但我们发现，偶氮咔唑化合物的掺杂使刻写具有相对较高衍射效率和快速响应的光栅成为可能，这可适用于整体可调激光器系统。

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