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首页> 外文期刊>Applied optics >Holographically formed polymer dispersed liquid crystal films for transmission mode spectrometer applications
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Holographically formed polymer dispersed liquid crystal films for transmission mode spectrometer applications

机译：全息形成的聚合物分散液晶膜，用于透射模式光谱仪应用

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摘要

We show proof of concept of a transmission-mode wavelength filtering device consisting of layeredholographically formed polymer dispersed liquid crystal (H-PDLC) cells. H-PDLC cells were fabricated from a thiolene based polymer composite to have transmission notches in the near-IR wavelength range. Wavelength filtering was achieved by stacking four H-PDLC cells with transmission notches spaced at 10 nm intervals. Results show a broad transmission notch spanning the spectral width of the constituent cells. With bias applied to an individual cell within the stack, the transmission notch of the cell inverts and the overall transmission envelope changes shape. Using a transmitted energy sensing device and a lineshape mapping algorithm, spectral content can be determined to a resolution of 0.1 nm for narrow banded signals. Applications for this switchable wavelength filtering device include serial detection of spectral content for telecom data signals or chemical and biological sample identification through absorption or emission spectroscopy.
机译：我们展示了由层状全息形成的聚合物分散液晶（H-PDLC）单元组成的传输模式波长过滤设备的概念证明。 H-PDLC电池由基于硫烯的聚合物复合材料制成，具有在近红外波长范围内的透射切口。波长滤波是通过堆叠四个H-PDLC单元并以10纳米间隔隔开的传输陷波来实现的。结果显示跨越组成细胞的光谱宽度的宽传输陷波。通过对堆叠内的单个电池施加偏压，电池的传输槽口将反转，整个传输包络线也会改变形状。使用发射的能量传感设备和线形映射算法，可以将窄带信号的光谱含量确定为0.1 nm的分辨率。这种可切换的波长过滤设备的应用包括对电信数据信号的光谱内容进行串行检测，或者通过吸收或发射光谱法进行化学和生物样品鉴定。

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