Tunable bandpass filter for mid-infrared wavelengths using liquid crystal elastomer actuators
Tunable bandpass filter for mid-infrared wavelengths using liquid crystal elastomer actuators
复制标题
使用液晶弹性体执行器的中红外波长可调谐带通滤波器
DOI：
10.1117/12.2289594
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
H. Zappe
中科院分区：
文献类型：
--
作者：
Z. Wang;Y. Folwill;P.-H. Cu-Nguyen;H. Zappe
中红外光谱是一种识别不同分子种类的有效方法，因为分子振动在该光谱范围内表现出强烈的响应。为了控制和优化化学过程，提高化学产量，现场测量是必要的。然而，传统的MIR光谱仪通常体积庞大，价格昂贵，难以用于空间分布的实时检测，特别是在微型反应器中。我们在这里提出了一个高度小型化的连续可调光学带通滤波器在MIR范围内用于微反应器中的化学检测。与法布里-珀罗干涉仪类似，微滤光片由两个平行的多薄膜布拉格反射镜和一个由液晶弹性体（LCEs）隔开的气隙组成。LCE是一种新型的由交联聚合物链组成的致动器材料，随着温度的升高，其宏观收缩性很强。我们将证明，LCE可以提供一个非常精确的，但大的机械运动的两个平行镜子，导致在波长调谐范围内的大自由度。将展示设计、制造和测量，展示滤波器的功能。
Mid-Infrared (MIR) spectroscopy is a powerful method to identify different molecular species due to the fact that molecular vibrations exhibit strong responses in this spectral range. In order to control and optimize the chemistry process, as well as enhance the chemical output, an in-situ measurement is necessary. However traditional MIR spectrometers are usually bulky and expensive, and are difficult to use for a spatially distributed, real-time detection, especially in a micro-reactor.We present here a highly-miniaturized continuously tunable optical bandpass filter in the MIR range for chemical detection in microreactors. Similar to a Fabry-Perot interferometer, the micro filter consists of two parallel multi-thin-film Bragg mirrors and an air gap, spaced by Liquid Crystal Elastomers (LCEs). The LCE is a novel actuator material composed of crosslinked polymer chains exhibiting strong macroscopic contraction as temperature is raised. We will show that the LCE can provide an extremely precise yet large mechanical movement of the two parallel mirrors leading to large freedom in the wavelength tuning range. Design, fabrication and measurements will be shown, demonstrating the functionality of the filter.
用于中红外气体光谱的紧凑型大口径法布里-珀罗干涉仪模块
DOI：
--
发表时间：
2014
期刊：
Photonics West - Optoelectronic Materials and Devices
影响因子：
--
作者：
U. Kantojärvi;A. Varpula;Tapani Antila;C. Holmlund;J. Mäkynen;A. Näsilä;R. Mannila;A. Rissanen;J. Antila;R. Disch;T. Waldmann
通讯作者：
T. Waldmann
液晶弹性体：新兴趋势和应用。
影响因子：
3.4
作者：
T. White;R. Verduzco
通讯作者：
R. Verduzco