Phototunable Photonic Crystals Based on Porous Silicon Filled with Photochromic LC mixture

Svyakhovskiy, S.; Bobrovsky, A.; Shibaev, V.

Авторы: Svyakhovskiy Sergey, Bobrovsky Alexey, Shibaev Valery
Сборник: 14th European Conference on Liquid Crystals, June 25-30, 2017, Moscow, Russia. Book of abstracts.
Тезисы
Год издания: 2017
Место издания: Москва, Россия
Аннотация: Nowadays, development of the stimuli-responsive photonic structures presents an important task due their unique optical properties promising for the different applications in photonic. In this work we present a new approach for the creation of phototunable photonic crystals based on porous silicon photonic crystal (PhC) filled with photochromic LC mixtures. The possibility of the reversible shift of the photonic band gap by UV-irradiation has been demonstrated.The photonic crystal was produced by electrochemical etching of porous silicon by technique described elsewhere [1] filled with photochromic nematic mixture 5CB + 6DABU (32.0%) (Fig. 1a). The composite structure was irradiated by focused light of UV diode (370 nm). The reflectance spectra of the initial structure, composite structure before and after UV-irradiation are shown in Fig. 1b. The photonic band gap of the composite structure is red-shifted by ~40 nm after UV radiation and returned to previous state in 3-5 days. The obtained phototunable photonic crystals can be used for the creation of photonic devices such as optical switches, color displays and sensors.References:[1] S.E. Svyakhovskiy et al., J. Appl. Phys. 112 (1), 013106 (2012).
Добавил в систему: Бобровский Алексей Юрьевич

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