中红外硫系玻璃微球传感器

项目名称： 中红外硫系玻璃微球传感器

项目编号： No.61205207

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 杨志勇

作者单位： 江苏师范大学

项目金额： 27万元

中文摘要： 本项目建议研制一种以高纯硫系玻璃为基质在分子振动指纹光谱区（2-20um中红外波段）高度透明的新型无标记光学传感器。这种传感器可探测痕量气体、化学和生物分子，并具有识别分子的能力。我们的研究策略是将目标分子的特征振动模与工作在中红外波段的光学微腔谐振频率相匹配，从而结合光学微腔传感器的高灵敏度优势和红外振动光谱的高选择性特点，进而探测和识别痕量分子。由于制作光学微腔传感器材料的透光范围限制，目前光学微腔传感器技术主要局限在可见光和近红外区域，无法探测分子振动模，对分子的识别通常采用微腔表面功能化处理，工艺复杂且表面功能化的传感器只能探测一种分子。硫系玻璃在中红外波段具有优异的透射性能，本项目中，我们将基于长期从事红外传输硫系玻璃和光纤材料的经验，研制可工作在中红外波段的高灵敏度硫系玻璃谐振微球传感器，尝试痕量多种分子的探测和识别。

中文关键词： 硫系玻璃；光纤；微球；中红外；

英文摘要： We propose to develop a novel label-free optical microcavity sensor fabricated from high-purity chalcogenide glasses that operate in the molecular fingerprint region of the spectrum between 2 and 20um. The devices will be capable of detecting as well as identifying trace quantities of gaseous, chemical and biological molecules. The strategy will consist of matching highly specific mid-infrared molecular vibrational modes of target molecules with the resonant frequencies of an optical microcavity. This will allow us to combine the outstanding sensitivity of optical resonator sensors with the high selectivity of vibrational spectroscopy. Current sensor technology based on optical microcavities has been restricted to the visible and near-IR due to the limited transparency of oxide materials, and the mid-infrared vibrational modes are therefore not accessible. The specificity is typically obtained by functionalizing the sensor surface with site-specific recognition molecules. The process is complicated and also limits the sensor to only one type of target. Chalcogenide glasses have superior transparency in the mid-infrared spectral region. Based on our extensive experience with infrared transmitting chalcogenide glasses and fibers, we will develop a chalcogenide resonant microsphere sensor with high sensitivity and

英文关键词： chalcogenide glasses；fibers；microspheres；mid-infrared；