Graphene-based liquid-crystal microlens arrays for synthetic-aperture imaging
Graphene-based liquid-crystal microlens arrays for synthetic-aperture imaging
复制标题
用于合成孔径成像的石墨烯液晶微透镜阵列
DOI：
10.1088/2040-8986/aa7c7e
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发表时间：
2017-08
影响因子：
2.1
通讯作者：
Xie Changsheng
中科院分区：
文献类型：
--
作者：
Wu Yong;Hu Wei;Tong Qing;Lei Yu;Xin Zhaowei;Wei Dong;Zhang Xinyu;Liao Jing;Wang Haiwei;Xie Changsheng
本文设计并制作了一种新型的石墨烯电极电控液晶微透镜阵列。石墨烯基液晶微透镜阵列（GLCMA）在可见光和近红外（NIR）波长区域均表现出优异的光束聚焦性能，并具有合成孔径成像功能。用于制造GLCMA的电极的石墨烯膜通过化学气相沉积在铜箔上生长，在上述两个波长范围内表现出低薄层电阻和高透射率的若干特性。形成GLCMA的关键工艺包括：将石墨烯膜从铜箔转移到选定的晶片上，常规UV光刻，ICP蚀刻和液晶封装。通过普通的光学测量，得到了不同波长的入射激光，如波长为600 nm的红光、波长为532 nm的绿色激光和波长为980 nm的近红外激光的点扩展函数。对焦斑尺寸、平均归一化光强、焦距、平均偏差率和对比度等关键参数进行了测量和分析。实现了一种基于GLCMA的特殊合成孔径成像，证明了基于几十或几百微米尺度的子孔径图案可以有效地构造出单个目标图案，从而为快速处理局部或小区域图案以提高特殊目标的探测效率提供了一条途径。
In this paper, a new kind of liquid-crystal microlens array with graphene electrodes controlled electrically are designed and fabricated successfully. The graphene-based liquid-crystal microlens arrays (GLCMAs) exhibit excellent beam focusing performances in both the visible and near infrared (NIR) wavelength regions and also synthetic aperture imaging function. The graphene films used to fabricate the electrodes of the GLCMAs are grown by chemical vapor deposition over copper foils, demonstrating several characters of low sheet resistance and high transmittance in both wavelength ranges above. The key processes for shaping the GLCMAs include: transferring graphene films from copper foils to wafers selected, conventional UV-photolithography, ICP etching, and liquid-crystal encapsulation. Through performing common optical measurements, the point spread functions of incident lasers with different wavelength, such as red lasers of ∼600 nm, green lasers of ∼532 nm, and NIR lasers of ∼980 nm, have been obtained. Several key parameters including focal spots size, average normalized light intensity, focal length, average deviation rate and contrast ratio have been acquired and analyzed. A particular synthetic-aperture imaging based on the GLCMA is realized so as to certify a fact that a single target pattern can be constructed effectively based on some sub-aperture patterns with several tens or hundreds of micrometer scale, and thus highlight a way to fast process partial or small-zoned patterns for enhancing the detection efficiency of special targets.
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影响因子：
56.9
作者：
Nair, R. R.;Blake, P.;Geim, A. K.
通讯作者：
Geim, A. K.
用于混沌加密的双模液晶微透镜阵列
影响因子：
2.2
作者：
Fan Di;Wang Cheng;Tong Qing;Lei Yu;Zhang Xinyu;Sang Hongshi;Wang Haiwei;Xie Changsheng
通讯作者：
Xie Changsheng
影响因子：
3.6
作者：
H. Ren;Su Xu;Shin‐Tson Wu
通讯作者：
H. Ren;Su Xu;Shin‐Tson Wu
DOI：
10.3390/ma9010036
发表时间：
2016-01-11
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Algorri JF;Urruchi V;García-Cámara B;Sánchez-Pena JM
通讯作者：
Sánchez-Pena JM
影响因子：
2.2
作者：
Seungwon Shin;Y. Jung;Kibeom Kim;Suk‐Won Choi;S. Kang
通讯作者：
Seungwon Shin;Y. Jung;Kibeom Kim;Suk‐Won Choi;S. Kang