Electroinduced Diffraction Gratings in Cholesteric Polymer with Phototunable Helix Pitch

Ryabchun, A.; Bobrovsky, A.; Stumpe, J.; Shibaev, V.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 26 ноября 2015 г.

Авторы: Ryabchun A., Bobrovsky A., Stumpe J., Shibaev V.
Журнал: Advanced Optical Materials
Том: 3
Номер: 10
Год издания: 2015
Первая страница: 1462
Последняя страница: 1469
DOI: 10.1002/adom.201500293
Аннотация: For the first time the cholesteric mixture containing nematic polymer with small amount of chiral-photochromic dopant is used for electroinduced diffraction gratings production. The gratings are obtained by applying electric field to the planar-aligned cholesteric polymer layer causing its periodical distortion. Material developed permits manipulating supramolecular helical structure by means of UV exposure resulting in helix untwisting. Photo-controlling of helix pitch brings to change parameters of the electroinduced gratings. Due to macromolecular “nature” of the material one can easily stabilize electroinduced gratings by fast sample cooling. All-known cholesteric grating types are realized in the studied polymer material. It is observed that the grating vector can be oriented along or perpendicular to the rubbing direction of the cell. It is shown that the diffraction efficiency is dictated by grating type and the amplitude of the applied electric field and can achieve about 80%. Moreover, the period of gratings can be tuned upon UV light illumination. The possibility of 2D gratings creation is also demonstrated. The described material and approach gives an opportunity to easily fabricate a variety of diffraction gratings with flexibly controllable parameters. Such gratings can be potentially applied in optics, optoelectronics, and photonics as intelligent diffraction elements.
Добавил в систему: Рябчун Александр Васильевич

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Electroinduced Diffraction Gratings in Cholesteric Polymer with Phototunable Helix Pitchстатья

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