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Proceedings Paper

An electrically controlled liquid crystal Fabry-Perot hyperspectral imaging chip in mid-infrared region
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Paper Abstract

This paper proposes a method to characterize a tunable liquid crystal Fabry-Perot (LC-FP) hyperspectral imaging detectors with electrically controlling and shifting wavelength of light beam penetrating the LC-FP chip proposed. Based on the effect of the directing vector distribution of LC materials can be remarkably changed and stably anchored in an electric field applied over the electrodes of the device, the refractive index of the LC materials filled into FP cavity can be modulated by voltage signal with relatively low amplitude. By the thin film matrix equation utilized, we calculated the transmissivity properties of the infrared radiation out from the LC-FP and continuously incident upon the photosensitive structure, and then acquired the basic relationship among the transmissivity, and the applied voltage signal, and the wavelength parameter selected. The key features of the proposal approach is as follows: (1) the device is mainly composed of very thin electrically modulating refractive-index architecture, which are generally two basic FP interferometers connected closely so as to accurately perform the choice of the wavelength desired in the spectral range by the interference filtering; and (2) the depths of the two FP interferometers are designed to be different, and through combination two parts mention ed above we can obtain some single wavelength desired of penetrating beam. The proposed device is being produced currently. The final device will be used to sequentially choose each desired infrared (IR) wavelength from incident IR radiation.

Paper Details

Date Published: 11 September 2013
PDF: 7 pages
Proc. SPIE 8907, International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications, 89074A (11 September 2013); doi: 10.1117/12.2034687
Show Author Affiliations
Anbang Fu, Huazhong Univ. of Science and Technology (China)
Huaidong Zhang, Huazhong Univ. of Science and Technology (China)
Xinyu Zhang, Huazhong Univ. of Science and Technology (China)
Hongshi Sang, Huazhong Univ. of Science and Technology (China)
Changsheng Xie, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 8907:
International Symposium on Photoelectronic Detection and Imaging 2013: Infrared Imaging and Applications
Haimei Gong; Zelin Shi; Qian Chen; Jin Lu, Editor(s)

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