國立虎尾科技大學 |

High-speed Imaging of Spatiotemporal Liquid Crystal Switching Dynamics.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	High-speed Imaging of Spatiotemporal Liquid Crystal Switching Dynamics./
作者:	Jin, Yang.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2015,
面頁冊數:	62 p.
附註:	Source: Masters Abstracts International, Volume: 76-12.
Contained By:	Masters Abstracts International76-12.
標題:	Materials science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1589463
ISBN:	9781321770964

High-speed Imaging of Spatiotemporal Liquid Crystal Switching Dynamics.
Jin, Yang.

High-speed Imaging of Spatiotemporal Liquid Crystal Switching Dynamics. - Ann Arbor : ProQuest Dissertations & Theses, 2015 - 62 p.

Source: Masters Abstracts International, Volume: 76-12.

Thesis (M.S.)--Tufts University, 2015.

This item must not be sold to any third party vendors.

Liquid crystals (LCs) are widely used for light modulation in industrial and commercial applications including device display technologies and optical switches for telecommunications. The elongation of LC molecules and their alignment to applied electric fields confers their unique electro-optical properties. However, their temporal response or `switching speed' due to an applied electric field is the primary limitation governing the overall performance of LC devices. To engineer better LC materials and faster devices, detailed knowledge of complex electrodynamic phenomena in LCs is required, yet no diagnostic methods are currently available to characterize fast temporal dynamics with high spatial resolution. In an effort to mediate this gap between instrumentation and LC physics, we have developed a technique based on high-speed imaging and polarization microscopy, which is used to characterize the spatiotemporal dynamics of LC switching on millisecond time scales with micron spatial resolution. To demonstrate the efficacy of this high-speed imaging method, we characterize the switching time scale for a standard Freedericksz cell as a function of the applied voltage. As a second industrially-relevant LC device geometry, we microfabricated an in-plane switching device that generates a highly non-uniform electric field, enabling us to measure spatial variations in switching speed within a single micro-scale device. Experimental results were compared with theoretical models to benchmark results, and also to quantitatively determine the LC switching dynamics from processed digital high-speed videos.

ISBN: 9781321770964Subjects--Topical Terms:

557839
Materials science.
Subjects--Index Terms:

High-speed imaging

High-speed Imaging of Spatiotemporal Liquid Crystal Switching Dynamics.
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